COMPETATIVE QUESTIONS IN MECHANICAL ENGINNEERING

1
BAJAJ PAPER ON 8th AUGUST 2008
1.Three friends divided some bullets equally. After all of them shot 4 bullets the total number of bullets
remaining is equal to the bullets each had after division. Find the original number divided.
18
2.Find sum of digits of D. Let A= 19991999 B = sum of digits of A, C = sum of digits of B, D = sum of digits of
C. (HINT: A = B = C = D (mod 9))
3.There is a 50m long army platoon marching ahead. The last person in the platoon wants to give a letter to
the first person leading the platoon. So while the platoon is marching he runs ahead, reaches the first person
and hands over the letter to him and without stopping he runs and comes back to his original position. In the
mean time the whole platoon has moved ahead by 50m. The question is how much distance did the last
person cover in that time. Assuming that he ran the whole distance with uniform speed.
4.If you take a marker & start from a corner on a cube, what is the maximum number of edges you can trace
across if you never trace across the same edge twice, never remove the marker from the cube, & never
trace anywhere on the cube, except for the corners & edges?
9
5.One of Mr. Bajaj, his wife, their son and Mr. Bajaj's mother is an Engineer and another is a Doctor. If the
Doctor is a male, then the Engineer is a male. If the Engineer is younger than the Doctor, then the Engineer
and the Doctor are not blood relatives. If the Engineer is a female, then she and the Doctor are blood
relatives. Can you tell who is the Doctor and the Engineer?
6.Three men - Sam, Cam and Laurie - are married to Carrie, Billy and Tina, but not necessarily in the same
order. Sam's wife and Billy's Husband play Carrie and Tina's husband at bridge. No wife partners her
husband and Cam does not play bridge. Who is married to Cam?
7.There are 3 persons X, Y and Z. On some day, X lent tractors to Y and Z as many as they had. After a
month Y gave as many tractors to X and Z as many as they have. After a month Z did the same thing. At the
end of this transaction each one of them had 24. Find the tractors each originally had?
8.A certain street has 1000 buildings. A sign-maker is contracted to number the houses from 1 to 1000. How
many zeroes will he need?
9.There are 9 coins. Out of which one is odd one i.e weight is less or more. How many iterations of weighing
are required to find odd coin?
10.In a sports contest there were m medals awarded on n successive days (n > 1). On the first day 1 medal
and 1/7 of the remaining m - 1 medals were awarded. On the second day 2 medals and 1/7 of the now
remaining medals was awarded; and so on. On the nth and last day, the remaining n medals were awarded.
How many days did the contest last, and how many medals were awarded altogether?
11.A number of 9 digits has the following properties: The number comprising the leftmost two digits is
divisible by 2, that comprising the leftmost three digits is divisible by 3, the leftmost four by 4, the leftmost
five by 5, and so on for the nine digits of the number i.e. the number formed from the first n digits is divisible
by n, 2<=n<=9. Each digit in the number is different i.e. no digits are repeated. The digit 0 does not occur in
the number i.e. it is comprised only of the digits 1-9 in some order. Find the number.
12. 1/3 rd of the contents of a container evaporated on the 1st day. 3/4th of the remaining contents of the
container evaporated on the second day.
What part of the contents of the container is left at the end of the second day?
(x-1/3x)-((x-1/3x)3/4)=2/3x-1/2x= 1/6x
13.Vipul was studying for his examinations and the lights went off. It was around 1:00 AM. He lighted two
uniform candles of equal length but one thicker than the other. The thick candle is supposed to last six hours
2
and the thin one two hours less. When he finally went to sleep, the thick candle was twice as long as the thin
one. For how long did Vipul study in candle light? 3 hrs
14.If you started a business in which you earned Rs.1 on the first day, Rs.3 on the second day, Rs.5 on the
third day, Rs.7 on the fourth day, & so on. How much would you have earned with this business after 50
years (assuming there are exactly 365 days in every year)?
15.A worker earns a 5% raise. A year later, the worker receives a 2.5% cut in pay, & now his salary is Rs.
22702.68 What was his salary to begin with?
16.At 6'o a clock ticks 6 times. The time between first and last ticks is 30 seconds. How long does it tick at
12'o.
17.In Mr. Mehta's family, there are one grandfather, one grandmother, two fathers, two mothers, one fatherin-
law, one mother-in-law, four children, three grandchildren, one brother, two sisters, two sons, two
daughters and one daughter-in-law. How many members are there in Mr. Mehta's family? Give minimal
possible answer.
18.When Alexander the Great attacked the forces of Porus, an Indian soldier was captured by the Greeks.
He had displayed such bravery in battle, however, that the enemy offered to let him choose how he wanted
to be killed. They told him, "If you tell a lie, you will put to the sword, and if you tell the truth you will be
hanged." The soldier could make only one statement. He made that statement and went free. What did he
say?
20.A person wanted to withdraw X rupees and Y paise from the bank. But cashier made a mistake and gave
him Y rupees and X paise. Neither the person nor the cashier noticed that. After spending 20 paise, the
person counts the money. And to his surprise, he has double the amount he wanted to withdraw. Find X and
Y. (1 Rupee = 100 Paise)
TECHNICAL
What is the material of Crank Shaft?
Standard time=
a. normal time minus allowance b. reliability time
3. Energy stored in the spring when it is fully compressed without any deformation is -------- ans. Resilience
or proof resilience
4. Question on the relation ML=PL/AE. What is ε (strain)? Ans. P/AE
Lower spindle speed is necessary for?
if diameter of w/p is large
when depth of cut is high
6. For which of the following material machinability is high? Ans. Aluminium
7. 24 & 2 in M24X2 represent which of the following two parameters respectively?
What is the equation governing kinematic links and pairs?
a. L=2p-3 b. L=2p-4 c. L=3p-5]
Pick out the wrong statement
Joule cycle consists of 2 constant volume processes and 2 adiabatic processes
Otto cycle consists of 2 constant volume processes and 2 adiabatic processes
Ericsson cycle consists of 2 constant volume processes and 2 adiabatic processes
None of the above
For same compression ratio which of the following cycles is more efficient?
a. otto b. diesel
The angle between face of the tool and plane parallel to the base of the tool is
a. rake angle b. clearance angle c. cutting edge angle d. lip angle
3
Bevel gears are used for transmitting torque between
Intersecting & coplanar shafts
Non-intersecting & non-coplanar shafts
Non-parallel & non-coplanar shafts
None of the above
Expansion process in Otto cycle lasts
from TDC to BDC
30 degrees before TDC till 50 degrees before BDC
30 degrees after TDC till 50 degrees afterBDC
none of the above
Which type of thread is more effectve for power transmission
in one direction?
a. square b. acme c. buttress
The state of a liquid during evaporation is
a. vapour b. steam c. water vapour
Throttle valve is used in steam engines to
control pressure of steam
control volume of steam
control temperature of steam
none of the above
BHEL PAPER ON 10th AUGUST AT SECUNDERABAD
SECTION-I----TECHNICAL
1. Critical load acting axially on a long column
Ans: (pi)2*E*I/L2
2. Relation between moment of area and radius of gyration
Ans: I=AK2
3. Cup shaped components are produced using which operation
Ans: drawing
4. A sheet of Al alloy having 2mm thickness is welded using which process
Ans: TIG
5. Two gears having teeth 18 and 40 and center distance 56…what is the module?
6. In thick cylinders, which of the following is true[*S stands for sigma*] (a) St>Sr (b) St=Sr (c)St
7. In a plane stress condition, if the centre of Mohr’s circle coincides with the origin then which is true…
….the relation between Sx and Sy is asked
8. Lame’s theorem….F1/sinA=F2/sinB=F3/sinC
9. Young’s modulus value for steel=200Gpa
10. Thermal conductivity of silver=400w/m0K
11. Fouling factor formula……F.F =1/Udirty-1/Uclean
12. Relation between notch sensitivity factor and theoretical stress concentration factor
13. Effectiveness of heat exchanger definition
4
14. Reynolds’s number formula
15. Clinical thermometer is which order system ….0,1,2, or 3
16. Piezometric transducer is used to find which signals—static or…. dynamic
17. Peclet number formula=Re*Pr
18. Radiation energy emitted, Eemitted=S*A*T4
19. Which of the following is not related to CI engine
(a) Fuel pump (b) carburetor (c).. (d) none
20. Two connected in series having stiffness’s K1, K2
Kequivalent=K1*K2/K1+ K2
21. Magnification factor at resonance, MF=1/2zeta
22. Coroili’s component value, =2vw
23. Hooks law holds good upto
(a)elastic point (b)UYP(c)LYP(d)Failure
24. Meshing of two gears fail if
(a)materials are different(b)
25. A beam whose one end is fixed and other is free is
(a)cantilever (b)ss(c)Udl(d)none
26. Deflection at the free end of cantilever =PL3/3EI
27. Shear stress, twisting moment given ,find diamaeter….
28. Formula for polar moment of inertia of a hollow shaft
29. Formula for logarithmic decrement
30. A problem based on the above formula
31. Two question on transmissibility(W/Wn ratio )
32. Question from vibration…mass,k given …cal frequency
33. Two more questions, one each from riveted joints and cotterjoint
34. 1BHN=N/m2
35. Temperature limits, given to find Carnot’s efficiency
36. Metacentric height is the distance between Metacentre and --------
Ans: Centre of gravity
37. Force and displacement vector given to find out the work done
5
38. Rota meter is used to find
(a)flow(b)velocity(c)pressure(d)density
In addition, 10-12 were asked from electrical basics.
BHEL PAPER ON 11th FEBRUARY AT NEW DELHI
The ratio of two specific heats of air is equal to. = 1.41
1. A perfect gas at 270C is heated at constant pressure till its volume is double. The final temperature
is = 3270C
2. An engine operates between temperature of 9000K and T2 and another engine between T2 and
8000K. For both to do equal work, value of T2 will be. = 6500K
3. Internal energy of a substance depends on = Temperature
4. Work done in compressing 1kg of gas adiabatically from p1,V1,T1 to p2, V2, T2 is equal to =
Cv(T2-T1)
5. The unit of entropy is = J/kg 0K
6. Indicated power of a 4-stroke engine is equal to = pLAN/2
7. Which of the following is not an internal combustion engine : a) 2 stroke petrol engine b)4 stroke
petrol engine c) Diesel engine d) steam engine e) Gas turbine. = (d)
8. If one cylinder of a diesel engine receives more fuel than the others, then for that cylinder the: a)
exhaust will be smoky b) piston rings would stick into piston grooves c) exhaust temperature will
be high d) engine starts overheating e) all of the above. = (e)
9. The spark plug gap is normally maintained at: = 0.45 to 0.6mm
10. A distributor in spark ignition engines performs the function of : = Providing the correct firing order
in engine
11. Which of the following does not relate to C.I. engine:: a) fuel pump b) fuel injector c) governor d)
carburetor e) flywheel = (d)
12. Air fuel ratio in a jet engine is = 60:1
13. What is the value of Prandtl No.?
14. In domestic refrigerator, the tubes at the back of the refrigerator are: a) evaporator b) condenser c)
capillary tubes d)………
15. Which refrigerants has the highest critical point temperature. = Freon-11
16. Wet bulb temperature is. = indication of amount of moisture in air
17. On psychrometric chart, dry bulb temperature lines are. = Vertical
18. Surface tension has the units. = newtons/m
19. The line of action of the buoyant force acts through the. =centroid of the displaced volume of fluid
20. A pressure of 25m of head of water is equal to. =245kN/m2
6
21. For a submerged body to be in stable equilibrium, the centre of gravity should be. =Below the
centre of buoyancy.
22. The actual velocity at vena contracta for flow through an orifice from a reservoir of height H=?.
=Cv√2gH
23. A body weighing 2kg in air weights 2.5kg when submerged in water. Its specific gravity is. = 6
24. In a free vortex motion: = each particle moves in a circular path with a speed varying inversely as
the distance from the centre.
25. A centrifugal pump has speed-1000rpm, Flow-1200l.p.m, Head-20m, Power-5H.P. If its speed is
increased to 1500rpm, new flow will be.: = 1800l.p.m
26. Runaway speed of a hydraulic turbine is: = the speed if the turbine runner is allowed to revolve
freely without load and with the wicket gates wide open.
27. 10m of water column is equal to = 100kN/m2
28. M.I. of a circular area about an axis perpendicular to the area is: = πr4/2
29. A projectile is fired at an angle θ to the vertical. Its horizontal range will be maximum when θ is .
=450
30. An elevator weighing 1000kg attains an upward velocity of 4m/sec in two seconds with uniform
acceleration. The tension in the supporting cables will be = 1200kg.
31. A 13m ladder is placed against a smooth vertical wall with its lower end 5m from the wall. What
should be the co-efficient of friction between ladder and floor so that it remains in equilibrium. =
0.21
32. A car is moving with a velocity of 60km/hr and possesses energy of 5x105 joules. The mass of the
car will be. =3000kg.
33. If l is the span of a light suspension bridge whose each cable carries total weight (w) and the
central diop is y, the horizontal pull at each support is: = wl/y OR
34. A beam of length l, having uniform load w kg/unit length is supported freely at the ends. The
moments at mid span will be: = wl2/8.
35. A boiler shell 200cm dia and plate thickness 1.5cm is subjected to internal pressure of 1.5MN/m2,
then the hoop stress will be. = 100N/m2
36. 100KW is to be transmitted by each of two separate shafts. A is turning at 250rpm and B at
300rpm. Which shaft must have greater diameter.: = B
37. Two identical leaf springs of spring constant k are arranged like cantilevers in parallel and attached
at free end by a spring of spring constant k. The equivalent spring constant of combination is; =
1.5k.
38. Automobile steering gear is an example of: = lower pair.
39. The type of coupling used to join two shafts whose axes are neither in same straight line nor
parallel, but intersect is. = Universal coupling.
40. To transmit power from one rotation shaft to another whose axes are neither parallel nor
intersecting, use: = Spiral gear.
7
41. A gear having 100 teeth is fixed and another gear having 25 teeth revolves around it, the centre
lines of both gears being joined by an arm. How many revolutions will be made by gear of 25 teeth
for one revolution of arm. = 5 rev.
42. The secondary critical speed of a shaft occurs at: = twice the speed of primary critical speed.
43. Brittle coating technique is used for: = experimental stress analysis.
44. Factor of safety is the ratio of: = yield stress/working stress.
45. Type of gear used for non-intersection perpendicular shafts: = Hypoid gears.
46. Corrosion resistance of steel is increased by adding: = Chromium & Nickel
47. The product of Cupola is called: = cast iron
48. Brinell tester uses a hardness steel ball of size: = 10mm
49. Sintered and tungsten carbides can be machined by: = EDM
50. What kind of abrasive cut off wheel should be used to cut concrete, stone and masonry? =Diamond
grit.
51. In break-even analysis, total cost consists of: = Fixed cost + Variable cost.
52. The amount deducted from the salary of workers towards employees provident fund is : =deposited
in the account of worker with Provident Fund Commissioner.
53. PERT is: = event oriented technique
54. Bar charts are suitable for: = minor works.
55. \ on a PERT/CPM chart represents: = a significant event representing some mile-stone
56. Electron volt is the unit of : = Energy.
57. Seamless tubes are made by?
58. Reheating in gas turbine results in: = increase of work ratio and decrease of thermal efficiency.
59. Why DC current is not used in transformer?
60. What is the purpose of draft tube in hydraulic turbines: = to convert the kinetic energy into pressure
energy.
61. A mass of 100kg is falling from a height of 1m and penetrates the sand to 1m. what is the
resistance force of the sand?
62. Two cars travel in the same direction at 40km/hr at a regular distance. A car comes in the opposite
direction at 60km/hr. It meets each car in a gap of 8 seconds. What is the distance between the two
cars?
1)Unit of Entropy (J/kg K or kJ/kg K)
2)A mass of 100kg is falling from a height of 1 m and penetrates the sand into for 1 m. What is the
resistance force given by sand.
3)Ratio of specific heats of air. (1.41)
4)A body weighs 3 kg in air. If it is submerged in a liquid, it weighs 2.5 kg. What is the specific gravity of the
liquid.
8
5)Two cars travell in same direction at 40 km/hr at a regular distance. A car comes in a opposite direction in
60km/hr. It meets each car in a gap of 8 seconds. What is the distance between them?
6)A simple problem involing in hoops stress. For sphere: M= [3/2]*p*V*[density of pressure vessel
material/Maximum working stress it can tolerate] For Thin walled pressure walls: Hoops stress or stress in
the radial direction =p*r/2t
7)A problem in force calculation in a body moving in a inclined surface.
8)Composition of bronze. (Copper+zinc)
9)Compostion of stainless steel.(iron+chromium+nickel+carbon)
10)CI is manifactured in which process. (cupola process)
11)What percentage of carbon is preset in pig iron. (4.5 to 6%)
12)Water is available at 10m height. What is the pressure available? (pressure=density*g*height;
p=1000*9.81*10; p=98100N/m2)
13)What will happen if the speed of the centrifugal pump doubles.
14)The unit eV is widely used in ? (Nuclear and atomic physics)
15)What will happen to the resistance, when the diameter of the conductor is doubled?
16)The power comsumed by a electrical device is 1000W at 250V, What is the resistance in the device?
(Power= Voltage*current; Current=Power/Voltage, Current,I=1000/250=4
amps. V=IR, Therefore R=250/4=62.5 ohms)
17)Why DC current is not used in transformer.
18)On what principle the sonar/ radar( I dont remember) works?
19)Bending moment diagram for the UDL is in what shape?
20)Function of the distributor in petrol vehicles? (Spark timing)
21)Which is not present in CI engines? (carburrettor)
22)What will happen if one cylinder receives more amount of fuel spray from injectors than other injectors?
23)Purpose of draft tube in hydraulic turbines? (The purpose of a draft tube is to convert some of the kinetic
energy of the flow from the runner (the rotating part of the turbine) into pressure energy and thereby
increase the efficiency of the hydro power turbine. )
24)What is the effect or reheater in the gas turbine? (The advantage of reheater is significantly increased
thrust; the disadvantage is it has very high fuel consumption and inefficiency)
25)Problems in involving with friction coefficient.
26)Factor of safety = Yield stress/Working stress.
27)Which is the example of non parallel power transmission (Universal coupling)
28)For perpendicular shafts worm gear is used.
29)A planet gear with 25 teeth is meshed with a sun gear of 100 teeth. Both are connected using a arm.
How many rotations are needed for planet gear to complete one rotation around the sun gear?
30)What is equivalent spring constant for spring in parallel?
31) Some questions was asked related to boundary layer and vortex flow.
32) 5 questions were asked in PERT, Process planning, Product planning, Break even analysis.
33)How are tungsten and sintered composite materials are machined? (Electro Discharge Machining, EDM)
Technical paper
1) How many links in slider crank mechanism?
2) Deflection of cantilever beam subjected to end point load?
3) Stress concentration factor Kf =?
4) What is the unit of BHN?
5) What is efficiency of riveted joint?
6) Composition of Munz metal?
7) One shaft is subjected to torque 1700 N-m having shear strength of 40Mpa. Determine the diameter?
8) A reversible engine is working between the 600F and 60F. Carnot efficiency is equal to =
9) Coefficient of restitution lies between =
10) Pectlet number is equal to = a)Re*Nu b)Re*Pr c)Re*Gr
11) Formula of effectiveness of heat transfer =
12) Emissivity depends on
13) Reynolds number formula
14) Production process for Al?
15) Thick metals welded by following processes…………
16) Logarithmic decrement is given by =
9
17) Magnification factor at resonance is given by =
18) Cutting forces decreases by = a) increasing rake angle b) decreasing rake angle c) increasing relief rake
angle
19) Some problem on Mohr’s circle radius…
20) Volumetric strain =
21) Pendulum problem Time is given length = ?
22) For undamped system Transmission Ratio is R then a) b)
23) Which is not related to CI engine = ans) spark plug
24) Cotter joint generally fail by
25) Which coupling is used for intersecting shafts?
26) No of teeth on gear and pinion is given, center distance is given, module = ?
27) Coefficient of friction and angle is given, what is ration of tension in belt?
28) What is lamis thoerm?
29) Condition for self locking ……
30) Discontinuous chips can be produced by ………….
31) For critical speed should be a)>√2 b) >√3
32) Air at 20C blows over a hot plate 50 by 75 cm maintained at 250C. The convective heat transfer
coefficient is 25W/m2. Cal the heat transfer.
33) Metacenter always lies ………….
34) Rotometer is used to measure….
35) Formula for effort of a governor……
36) Stroboscope is used to measure…..
37) What is size of A4 paper?
38) Some problem on riveted joint…..
39) Modulus of rigidity G is given by……
40) Wave properties in solids is depends on elasticity.
41) Radiation heat transfer is directly proportional to ………….
42) Escape velocity is given by √2gR
43) Kinetic energy formula….
44) Corolis component…….
45) Potent ional Energy theory is given by…………….
46) Perpendicular axis thoerm…………
47) Pappus thoerm…….
48) Center of gravity of a spherical shell……………..
49) Angle and linear dimension is given by chamfer.
50) For thick cylinders ………………..
51) N = 10 to N = 10E5 cycles then it is …. a) finite life b)infinite life
52) Value of steel young’s modulus ……
53) Endurance strength of steel equal to …………
54) Three problems on strain gauges ….
55) Three problems on vectors some related to work done….
56) Straight line mechanism…
57) Some problem springs..
58) Design on thermal stresses can be considered for a) concrete b)steel rolls c)blast furnace
59) Velocity problem it is in the vector form to find displacement?
60) Hardness is a property
10
BRAKES INDIA LIMITED
STAGE I:
TEST I : GENERAL APTITUDE : 15 MINS : 25 QUESTIONS
IN THE BELOW QUESTIONS BLOCKED WORDS WERE ANSWERS)
Commerce minister of India, ---------( Arun jaitley)
First car using CRDI is----------(hyundai Accent, Skoda Octavia,)
First Indigenous car sold in European market-------------(tata indica, M&M scorpio, fiat palio)
Selection Committee Leader of Indian cricket team-----------(kiran more, syed kirmani, brijesh patel)
Governor of RBI(Reserve Bank
of India)------------(s.rangarajan, sivathanu pillai, y.v.reddy, bimal jalan)
WTO meeting recently held at ---------(Cancun, Jakarta, Geneva)
Economic Growth Rate is measured by---------------(GDP,inflation,GNP)
HAL’s(Hindustan Aeronautical Limited) indigenous aircraft -----------(Tejas,trishul,danush)
Which European country does not have the same currency--------(U.K,spain,france,germany)
Meaning of URGE------(desire,strength,forceful demand)
Opposite of PHENOMENAL-------(ordinary)
Find in which part Grammatical /idiomatic error occurs in the sentence
Yesterday while/crossing the road/he was/ run out by a lorry
A B C D
13.ISRO chairman---------(madhavan nair)
14.opposite of “obscure”(explicit)
15.Meaning of apprehend (fear)
16. what is the name of the robot presented by japan to Indonesia- azimo Honda
17. it is very cold outside. You must take some clothes with you.
Ans: combined sentence will start with
As it is very cold outside.
18. By the time we reached the station the train had departed.(ans)
STAGE II:
TEST II : TECHNICAL TEST : 30 min : 75 QUESTIONS
In V belt drive contact is made on
1) bottom 2) sides 3)bottom and sides
Section modulus of hollow shaft
PI/32*(D4-d4)/D
3. Down milling is also called Climb milling
4.Drilling is an example of Oblique cutting
5.Section view of ’C’ washer
6.Deflection of simple supported beam carrying UDL 5/384*Wl4/EI
7.Flexible coupling is used because
8.Washer is used to provide bearing area
11
9.Initial tension is considered in
1)tension springs 2)Compression springs 3)Both
10.Kelvin plank law deals with 1) Conservation of work into heat 2) conservation of heat into work
11.Soldering alloy consists of Tin and lead
12.Why chromium is used in steel alloys? Corrosive resistance
13.High cutting speed is obtained while machining
1) HSS 2) carbide 3) CBN
14.Metal forming is an example of chipless machining
15.Top rake angle is provided for Easy removal of chip
16.Alloying is done for increased strength and application
17.Transformer is used welding 1)to convert AC to AC
2)AC to DC 3) DC to AC
18.spheroidal cast iron is getting from Grey cast iron by adding Mg
19.In throttling process Enthalpy constant
20.70 cc of engine means swept volume
21.Tan (a) = co efficient of friction
22.Geneva mechanism is used for Intermittent motion
23.In NC system for profile machining
1)point to point 2) contour motion 3)paraxial m
24.In centreless grinding, the grinding wheel and the regulating wheels rotate in the same direction.
25.Centridal distance of a semi circle 4*r/3*pi
26.Highest packing factor: FCC
27.Which chart takes care of conrol attributes : Pchart, C chart, R chart
28.Fixture is used for holding the workpiece without disturbing the tool path
29.Code for circular interpolation G 02
30.Order of transmission in a car: EFCPD
Engine Flywheel Clutch propeller shaft Differential
31.Reverse gear has less speed because
1.More speed is not necessary in reverse gear 2.Steering is difficult in the reverse direction 3.less space
availability 4.Design simplification
32. which of the following has no unit: specific gravity
12
33. use of annealing : to relieve stresses
34. question on stress concentration
4 figures: one with the notch is the answer
35. how many squares are there in this figure: 14
36. pulley question: w=f/2
37. equivalent stiffness of springs in series: k1k2/(k1+k2)
38. Deflection=5 mm.stiffness=k,.then applied load is 5 k
39 bevel gear is used in differential
Diagram Questions(Technical )20 Questions like
what is the stress in xx section? 1)bending 2)axial loading 3)both
Caterpillar-2004 FEB Sample Paper
Verbal:
1. Synonym: pontificate. (Talk in a dogmatic and pompous manner)
2. Antonym: loquacious. (Means Full of trivial conversation)
3. Analogies: Whiff: scent Birds: anthropology (doubtful) Generator: Current.
vacilliate :resolution as diobey :order…
4. odd man out: iconoclast,hyperbole,exaggeration amused ,bemused, preoccupied mural,nostalgia,dream
General Awareness:
1.Myopia
2.Scurvy
3. Montagu-chelmsford reforms
4. How can you remove the president from his office?
5. Minimum age for a person to be eligible to become a president.
6. Who can preside over the meetings of both the sabhas but still cannot vote?
7. regional army command is commanded by
8. strength of defenc epersonal is 10 lakhs ,12lk,15,lk
9. mirage 2000 aircraft is from which contry
10. broad gauge 1.67m,2m,1.83m
11. production of steam locomotives stopped from year
12. first presidensy ban in which city,Chennai,Mumbai,Calcutta,delhi
13. export import bank started in yr
13
14. what % of Re,1 coins in Indian currency
15. what earns more foreign money,tea,jute…
16. strength of indian army.
17. who commands the regional army.
18. mirage bought from ans:france
19. inflation occurs due to (increase in money)
20. from where india get max for exchange.(jute,iron steel,sugar,tea)
21. % of 1 rupee coin in total indian currency.
Tech:
1.Which of the following uses consumable electrodes.(I believe the options were MIG,TIG and stuff like that)
2.Alloy used in the manufacture of surgical instruments.
3. Uses of superconductors.
4.Four questions from IC engines :
a. For a given compression ratio the efficiency of Otto cycle>Diesel cycle.(Is this right?)
b. Turning moment diagram for compression stroke of IC engine.
5. What path does double slider crank mechanism follows. (Check if it is Elliptical).
6.Ratio between Brake horse power to the energy supplied.
7. Two emfs E1 and E2 are given. Among two lengths one is given. Be clear with the relation between ratio
of emfs to the lengths across.
anodizing
honing
thermoplastic
if fine powder is added to metal soln,it forms single crystal/ refines grains
function of draft allwance in moulding
if various sizes ,hp….etcof engines r to be tested the which measure is taken a.a/f ratio
b.swept vol etc
value of pressure used in elec resistance welding
up milling
down milling
one of the tool angles definition is give \n choose
hammer blow
pump in sewage
pump in oil
heat trnfer based oin which thdy law
sum usin thermal coeff of exp to fin stress
porytion hot in refridegeration
spinning causes bending or bending and stretching or..
critical speed of a shaft is affected by
starting friction is low in
ht transfer is based on which law(zeroth,first,2nd,kirchoff)
in refregeration where will temp be max?ans:between compres and condenser
stoichiometric AF ratio is (chemically correct mixture by wt,ans:chemically correct mixture by efficiency)
anodidising is
14
how will u compute performance of desel eng?ans:bsfc
how will u pump sewagw water ie which pump?
how will u pump viscous fluid?
honing process:
if thread angle is increased (mechanical adv decreases)
principal plane condition:(shear stress 0,normal stress max)
if refrigerator is opened in a room ,fan is also on.what will happen to room temp?
graft in casting
how will u improve resistance
Quantitative:
1.Two trains are travelling between two stations at a constant speed of 25kmph.The stations are 50km apart
.A bird traveling at 100kmph starts its flight along with one train and travels in the same direction until it
meets the other train. It changes its direction and goes in the reverse direction until it meets the initial train.
Find the distance travelled by the bird before the two trains collide.
2.A flight carrying food packets is flying at a height of 1960m from the ground. The speed of the flight is
given. Find the time taken for a food packet dropped at that instance to hit the ground.
(Hint: Use s=ut+(at^2)/2.Initial velocity as 0 coz the dropped food packet does not have velocity in the
vertical direction.)
when a square is constructed on 3 sides of a triangle ,their sides are in the ratio 1:3:4,THE WAT triangle is it
x2+y2=45,xy=18,then 1/x+1/y=
x-11/x>13/15,then x=
in race 100m,b bet c by 25m.a bet b by 20m.then a will beat c by what metres
5 tables and 10 chairs were sold for 20000.15%gain for table,10%loss on chair.overall profit rs 750.the cp of
table is
a man rows in still water in 9kmph in 2hr.if upstrm vel is 2times down,then find speed of stream
h:base dia of a cone is 3:2.icecream is filled usig hemisph scoop whose half part is inside cone.if total length
of icecrem is 36 cm,find vol of icecream
a,b,c complete work in 4 days.a &b finifh in 7 days.time for c is & similar sums
length of line perpendi to given line eqn
avg of 5 playrs is x.addition of 6th player increases avg by 2.add od 7thplyr decreases avg by 2.runs of 7th
plyr is
if 500 more cows r there then each cow gets 40% less hay.the no of cows is
value of gold is increasing by 11%.if present value is 10000,then value beforwe 2 months is
venn diagram verbal sum
an amount doubles in 5 yrs due to SI.wat will be the value of the amt.in 13yrs 9 months if princi is adden
every year
first a=I
vaue of a sqre is assigner to b
c=b+1
if sqrt of c>5o terminate,else goto beginning
wat is the last value of c
22. sum of sqr of 2 nos is 45,prod is 18 find the sum of the reciprocals.
23. labour sum(6 days)
24. Cows consume hay.500 more cows decreases the hay by 40% per head. find the no of cows.
Delphi-TVS 23 APRIL 20 03 ALAHABAD
TESTS:100 mins 130 qns.
Directions: For questions 1 to 5. Each sentence below has one or two blanks, each blank indicating that
something has been omitted. Beneath the sentence are four lettered words or sets of words. Choose the
word or set of words for each blank that best fits the meaning of the sentence a whole.
Though science is often imagined as a _______ exploration of external reality, scientists are no different
from anyone else: they are ______ human beings enmeshed in a web of personal and social circumstances.
a) fervent..vulnerable b) neutral..rational
15
c) painstaking..careless d) disinterested..passionate
Among the many ______ of the project, expense cannot be numbered; the goals of the project promoters
can be achieved with impressive ______.
a) highlights..efficiency b) features..savings
c) disadvantages..innovation d) defects..economy
A leading chemist believes that many scientists have difficulty with stereochemistry because much of the
relevant nomenclature is ______ in that it combines concepts that should be kept ______.
a) obscure..interrelated b) impressive..discrete
c) subtle..inviolate d) descriptive..seperate
The old man could not have been accused of ______ his affection; his conduct towards the child betrayed
his ______ her.
a) lavishing..fondness for b) sparing..tolerance of
c) rationing..antipathy for d) stinting..adoration of
Many of the earliest colonial houses that are still standing have been so modified and enlarged that the
______ design is no longer ______.
a) pertinent..relevant b) initial..discriminable
c) embellished..attractive d) appropriate..applicable
Directions: For questions 6 to 10. In each of the following question, a related pair of words or phrases is
followed by four lettered pairs of words or phrases. Select the lettered pair that best expresses the
relationship similar to that expressed in the original pair.
MISER : THRIFT
a) performer : artistry b) chauvinist : patriotism
c) mimic : ridicule d) politician : compromise
VOTING : ROLL CALL
a) termination : cloture b) amendment : constitution
c) majority : concession d) quorum : filibuster
ARTICULATE : CLEARLY
a) orate : strongly b) shout : loudly
c) lecture : willfully d) malign : incoherently
TALON : EAGLE
a) fang : snake b) hoof : horse
c) claw : panther d) quill : porcupine
INSULIN : PANCREAS
a) bile : liver b) menthol : eucalyptus
c) oxygen : heart d) honey : bee
16
Directions : For questions from 11 to 15. Each question below consists of a word printed in capital letters,
followed by four lettered words or phrases. Choose the lettered word or phrase that is most nearly opposite
in meaning to the word in the capital letters.
VAGUE
a) expressive b) Felicitous c) well-defined d)nearly perfect
FOCUS
a) disappear b) disperse c) link d) activate
PROLOGUE
a) soliloquy b) trilogy c) analogue d) epilogue
DISARM
a) hold close b) put on guard c) challenge d) entertain
INFLATE
a) converge b) inhibit c) audit d)minimize
In a telecommunication – cable assembly plant, cables are assembled by twisting plastic – coated wires
together. There are wires of exactly six different solid colours – red, yellow, violet, green, white and black.
Wires must be assembled into single cable according the following rules.
Each cable must contain at least three wires and wires of atleast three different colours.
At most two wires in a single cable can be black
At most two wires in a single cable can be white
There can be at most one wire of each of the other colours in a single cable
If one wire is red, then one wire must be yellow.
If one wire is violet, then no wire can be green.
Which of the following could be the complete set of wires in an acceptable cable?
A green wire, a white wire and a violet wire
A violet wire, a black wire and white wires
A red wire, a black wire and a green wire
A yellow wire and exactly two black wires
If exactly one black wire and exactly one white wire are used in an assembled cable, which of the following
must be true
the cable contains no more than five wires
the cable contains exactly six wires
the cable contains a yellow wire
the cable does not contain a red wire
The maximum number of wires that can be used in an acceptable is
a) 8 b) 7 c) 6 d) 4
If a white wire and a violet wire must be among the wires choose for a particular cable, any of the following
pairs of wires could complete the cable except a
black wire and a second white wire
yellow wire and second white wire
yellow wire and a black wire
red wire and a black wire
If an assembled cable consists of five wires, each a different colour, it could be true that a colour not used is
a) Black b) White c) Green d) Red
If there is an additional requirement that violet wire must be used, if yellow is used, which of the following
must be true?
No cable contains fewer than six wires
No cable contains more than five wires
17
Green is never used if red is used
Red is always used if violet is used
Directions:
The manager of a radio program is going to future six Vocalists – M,N,P,Q,R and S – on an half-an-hour
radio show during the course of one week. She will feature one vocalist on the show each day from Monday
through Saturday. The manager must schedule the vocalists for the show according to the following
conditions.
M must be featured earlier in the week than R
P must be featured on Tuesday
Q must be featured on the day immediately before or immediately after the day on which N is featured.
If N is to be featured on Thursday, the earliest day on which R can be featured is
a) Monday b) Tuesday c) Wednesday d) Friday
If S is to be featured on Friday, M must be featured on
a) Monday b) Tuesday c) Wednesday d) Thursday
If Q is to be featured on Thursday, the latest day on which M can be featured is
a) Monday b) Tuesday c) Wednesday d) Friday
Which of the following vocalist can be featured on Monday?
a) N b) P c) Q d) S
If S is to be featured on Thursday, which of the following is true?
a) M must be featured on Wednesday b) N must be featured on Saturday c) Q must be featured exactly two
days after R is featured
d) R must be featured on Wednesday
If S is to be featured on Friday, what is the total number of acceptable schedules available to the manager?
a) 1 b) 2 c) 3 d) 4
Directions: For Question 28 to 30. Each Question or group of questions is based on a passage or set of
conditions. In answering some of the questions, it may be useful to draw a rough diagram. For each
question, select the best answer choice given.
Questions
An instrument has exactly six keys, each sounding a different note. The notes are K, L, M, N, O and P.
Playing this instrument involves playing successive chords; each consisting of three of the notes produced s
simultaneously;
Notes K and N can only be produced simultaneously. Notes L cannot be produced simultaneously with note
O. a chord can neither be the same as the one immediately is nor be the same as the one immediately after
it.
Each of the following is an acceptable chord EXCEPT
a) KLP b) KMN c) KNP d) LMP e) MOP
29.Chord LMP could be immediately followed by each of the following chords EXCEPT
a) KLN b) KMN c) KNP d) LMP e) MOP
Which of the following pairs of notes can be played simultaneously with K to produce an acceptable chord?
a) LM b) LO c) LP d) MN e) OP
If both filling and emptying pipes of a pool are open, the pool fills in 10 hours. If just the filling pipes are
18
open, the pool fills in 4 hours. How many hours does it take to empty the pool if just the emptying pipes are
open
a) more than 5 but less than 6 b) exactly 5 c) more than 6 d) exactly 6
a cube has an edge of 4, if the cube is split into cubes with edges of 2, what is the total surface area of the
smaller cubes ?
a) 32 b) 64 c) 96 d) 192
a man traveled along a straight road from a town P to town Q at a uniform rate of 30 miles/hour, he then
returned at a uniform rate of 60 miles/hour. What was his average rate for the round trip in miles/hour?
a) 35 b) 38 c) 40 d) 45
Exactly how many degrees are there between the hands of a clock at 3:40 pm
a) 110 b) 120 c) 130 d) 140
a man walked diagonally across a square plot. What was the percent saved by not walking along the edges?
a) 20 b) 22 c) 24 d) 30
A gallon of oil is poured to a cubical container 7 inches on an edge. About how high in inches does the oil
rise in the container? (I gallon = 231 cubic inches)
a) 3.8 b) 4.2 c) 4.7 d) 5.2
the time allowed for completing a certain piece of work is 40 days. By extending the time by 10 days we find
that 25 fewer man will be needed. How many men are required to finish the work in 40 days?
a) 115 b) 125 c) 135 d) 145
A whistle blows every 14 minutes and a bell rings every 12 minutes. If the whistle and bell both sound
together at 12 :00 noon, at what time, afternoon, will they first sound together again ?
a) 2:48 b) 2:24 c) 1:54 d) 1:24
A truck can hold 3 cubic yards of sand. If a cubic foot of a sand weighs 80 pounds, the weight of the truck
load of sand in pounds is
a) 240 b) 270 c) 2160 d) 6480
A ship sails 60 miles south, 90 miles east and 60 miles south again. How many miles is it from its starting
point ?
a) 120 b) 135 c) 150 d) 160
41. The formula h= 16t2 represents the distance h; infeet, that an object falls from rest after 1 seconds. In
how many seconds will an object fall 400 ft.
a) 2 b) 3 c) 4 d) 5
Technical
1.machine tool drives are generally given in:
a) arithmetic progression b)geometric progression
c) harmonic progression d)none of the above
2.finite element analysis is used in
a) accurate measurement b)stress analysis
c)metallurgy d)none of the above
3.coolant is generally not used while machining
a) low carbon steel b)high carbon steel
c) cast iron d)alloy steel
19
4.Machinability of steel is improved by the presence of
a)nickel b)tungsten
c)sulphur d)chromium
5.negative rake angle
a)increases cutting force b)decreases cutting force
c)no effect on cutting force d)none of the above
6.the hardest tool material used is
a)coated carbide b)high speed steel
c)boron nitride d)diamond
7.stick slip phenomenon is associated with
a)spindle rotation b)belt drives
c)slide movement d)none of the above
8.Gear hobbing is
a)shaping process b)generating process
c)forming process
9.cutting speed of H.S.S tools while cutting low carbon steel
a)40m/min b)250m/min
c)500m/min d)none
10.cutting speed of carbide tools while cutting low carbon steel
a)40m/min b)250m/min
c)500m/min d)80m/min
11.straightness that can be achieved over a length of 300mm by grinding
a).005 -.01mm b)0.1-0.2mm
c)0.05-0.1mm d)0.5-0.8mm
12.the circularity that can be achieved by finish turning on a standard centre lathe is
a)0.005-0.008mm b)0.0-0.08mm
c)0.1-0.2mm d)0.2-0.3mm
13.honing can correct
a)oviality b)taper
c)straightness of bore d)axial curvature
14.Machine tool sliding surfaces are finish matched by
20
a)surface grinding b)fine milling
c)slide way grinding d)scraping
15.Close sliding fit is given by
a)H7/g6 b)H7/h6
c)H9/p6 d)H7/k6
16.60H6 can be achieved by
a)turning b)boring
c)drilling d)internal grinding
17.The displacement accuracy which can be achieved on a jig boring machine
a)5/cm b)50/cm c)100/cm
18.Hardness value in cast iron can be measured in
a)shore b)BHN c)Rockwell d)none
19.Auto collimator is used to measure
a)dia upto 0.001mm b)lengths
c)straightness d)Involute error
20.Surface finish is measured by
a)comparator b)planograph
c)sprit level d)none
21.The outside diameter of a 20 teeth 3 module gear is
a)54 b)60 c)63 d)70
22.Herring bone gear is used for
a)High speed transmission b)noise free transmission
c)Better load transmission d)none
23.In a right angle transmission by helical gears, the hand of the helix of the gears are
a)same b)opposite c)Immaterial d)none
24.Worm drive is always self-locking
a)True b)false
25.Most hydrostatic bearings normally work under
a)constant flow system b)constant pressure system
c)constant temperature system d)constant volume system
26.Ball bearings are not generally used in crank shafts of automobiles
21
because
a)of high cost b)of high speed c)cannot be assembled d)none
27.Bronze is used in journal bearings essential to
a)reduce friction b)reduce heat
c)eliminate oxidization d)eliminate seizing
28.The spindle of high precision cylindrical grinder is mounted on
a)Ball bearing b)Taper roller bearing
c)Hydrostatic bronze bearing d)needle bearing
29.To accelerate the flow of gases
a)nozzle is used b)diffuser is used
c)dia of pipe to increased d)none of these will help
30.Hydraulic accumulator
a)acts as an accumulator b)acts as a storage for hydraulic energy
c)acts as a pressure relief d)none
arrangement.
31.When ice which is floating in water, melts, does the level to water
a)go up b)go down c)remain the same.
32.Hammer blow in pipe happens due to
a)friction in pipes b)change in temperature
c)stoppage of flow d)none
33.Temperature rise in fluid flow causes
a)reduction in viscosity b)increase in viscosity c)no effect
34.Ratio between velocity of sound and velocity of any object is
a)Prandtl number b)Reynolds number
c)Avagadro’s number d)mach number
35.Cavitaion effect in flow occurs due to
a)excess pressure b)excess temperature
c)excess flow d)none
36.In electrical locomotives ultimate transmission is by
a)AC Motor b)DC Shunt Motor
c)DC Series Motor d)Synchronous motor
22
37.Four beams of identical sections and lengths are made of cast iron, aluminium,steel and hardened steel.
The beams are fixed at both ends; for a uniformly distributed load which will deflect least
a)cast iron b)aluminium c)steel d)hardened steel
38.Geneva mechanism is used for obtaining
a)Intermittent motion b)accelerating motion
c)continuous motion d)none
39.Corioles component is associated with
a)Displacement b)acceleration
c)velocity d)none
40.Effect of increase of outside diameter of a helical compression spring on its rigidity is
a)increased rigidity b)decreased rigidity
c)no effect d)dry friction
41.Jominey curve is related to the study of
a)hydraulics b)thermodynamics
c)electrical d)none
42.TTT diagram is used in
a)surface finish b)heat treatment
c)stress analysis d)thermodynamics
43.Mehanite is the name given to a type of
a)alloy steel b)granite
c)nodular cast iron d)cast iron
44.Unwanted impurity in molten aluminium is
a)oxygen b)carbon dioxide
c)nitrogen d)hydrogen
45.Hardness in steel is a s a result of
a)martensitic structure b)pearlitic structure
c)leduburetic structure d)austenitic structure
46.Carburising is done
a)for blackening of high carbon steel b)for case hardening of
low carbon steel
c)for post hardening d)to increase machinablility
process to reduce of high tensile steels
23
internal stresses
47.piston of an IC engine is made out of
a)cast iron b)steel casting c)beryllium alloy d)aluminium alloy
48.The crank shaft of a 300 HP IC engine is
a)hot forged b)shell moulded
c)cold forged d)obtained through investment casting
A 6kg ball is suspended from two wires of equal length. The angle between the wires is 90 degrees. What is
the tension in each wire?
58.8N
41.6N
29.4N
83.2N
a 523 kg experimental rocked sted can be accelerated from rest to 1602 km/h in 1.82s. what net force is
required?
4.6X106N
4.6X105N
1.6X106N
1.3X105N
a force that averages 984N is applied to a 0.42kg steel ball moving at 13.8 m/s by a collision that lasts
0.027s. if the force is in a direction opposite to the initial velocity of the ball, what is the final speed of the
ball?
77.1m/s
63.3m/s
13.8m/s
49.5m/s
a stone initially at rest is dropped over the edge of a very tall building. Taking g as 10m/s2 , what was the
change in the speed of the stone building during the 4th second?
10m/s
30m/s
15m/s
40m/s
how long will it take a 2000w motor to lift a 320kg container vertically upwards for 26m?(g = 9.8m/s2)
29s
6.3s
4.2s
4.1s
a collision between two isolated items will in generally conserve
the total kinetic energy and the total momentum of the system
the total kinetic energy but not the total momentum of the system
the total momentum but not the total kinetic energy of the system
the momentum of each object
what is the force exerted on a submarine window of 2m2 area, if the submarine is at a depth of 2km below
the surface?(the density of sea water is 1.03X103 kg/m3)
4.04X107N
4.04X104N
24
2.02X104N
2.02X107N]
how many of the following statements are true:
the buoyant force on a body depends on the shape of the body
the buoyant force on a body always acts in the same direction
the buoyant force on a body depends on the mass of the body
the buoyant force on a body depends on the density of the fluid surrounding the body
only one
only two
only three
only four
how many of the following statements may be false?
The pressure in a fluid depends on the density of the fluid
The forces due to pressure in a fluid act perpendicular to the surface of a body immersed in a fluid
The buoyant force experienced by a body immersed in a fluid depends on the density of the body
The buoyant force always acts vertically upwards on a body immersed in a fluid
Only one
Only two
Only three
All four
A body partially floats with 2/3rds of its volume under the surface of a fluid. If the density of the fluid is X
kg/m3, what is the density of the body?
3/2 X kg/m3
2/3 X kg/m3
14.7 X kg/m3
0.15 X kg/m3
how many atoms are present in a mole of CH4 ?(avagadro’s number = 6.023X1023 /mole)
1.2X1024
3.01X1024
1.2X1023
6.023X1023
a power station generates 500MW of power and exhausts 800MW as waste heat into the environment. What
is the efficiency of the power station?
61.5%
38.5%
62.5%
23%
how long does it take a 350W coffeepot to boil of 0.7L of water initially at 1000c. the latent heat of
vapourisation of water = 2.1X106 J/kg.
6.1 min.
7.0 min
3.9 min.
3.1 min.
a 16 ohm resistor and 8 ohm resistor are connected in series across a 12V battery. What is the voltage
across each resistor respectively?
8V , 4V
4V , 8V
12V, 12V
25
6V, 6V
how many of the following statements regarding sound are true?
Intensity depends on the square root of the amplitude
Loudness only depends on the intensity of a sound
The pitch of a sound depends on the frequency
Sound is reflected whenever a change in acoustic impedance is encountered
Only one
Only two
Only three
All four
How many of the following statements regarding light are true?
Light travels in a straight line even when it crosses between two media of different refractive index
Infrared light has longer wavelength than ultra-violet light
Light can behave both like a ray and like a particle
It is possible to get a real image with a concave lense
Only one
Only two
Only three
All four
NTPC PAPER
11 An ice block submerged in the water, if the ice melts level of water (increase,decrease,remains
same,none)
2 Simply supported beam with w point load at the middle, max. bending moment?(wl/4)
3 Simply supported beam with UDL ,max.deflection (wl4/384EI)
4 Cantilevel beam point load at tip,max.bending momemt comes at (end)
5 When bearing life L10 represents (bearings 10%survive,bearings 10% fails, none )
6 For welding high carbon steels which type of flame is used (oxidizing,carburizing,neutral,none)
7. Arrange the following cutting tools
in decreasing order of machining hardness…Ceramics
8. When P1 and P2 are the loads acting on bearings with life L1 and L2 then L1/L2=?
L1/L2={P2/P1}10/3
9.Product simplification does not mean??
Product characterization
10 Which of the following process has the most scope in manufacturing?
CAD/CAM, CAM, CIM, All the above.
26
11. Concurrent engineering means?
(Manufacturing, designing, both,none)
12. Which manufacturing process yields higher output and increases worker productivity-
(process layout,line+process,functional layout)
13. 18-4-1 represents-, Tungsten-Cr-Vn
14 For which material is negative allowance provided-(Graphite,steel,bronze,cast iron)
15. What is the recrystallisation temperature of tin- (60,300,1000,none)
16. What is the purpose of borax in soldering-
17. Top gates are provided in which type of casting-(Shallow casting,simple,complex,none)
18. Which statement is true regarding simple gear trains-(i/p and o/p shafts r fixed, each shaft has 2 gears,
i/p & o/p shafts r moving)
19. What is the purpose of normalizing- (Refining of grain structure)
20. As the grain size is decreased-(Hardness increases,corrosion resistance decreases,both)
21. Isothermal gas is filled in a vessel at a pressure P and temperature T then considering the compressible
forces as the height increases pressure ??(linearly increases linearly decreases exponentially increase )
22. A bottle is filled with water and air and is tied to a string and is rotated in horizontal direction. Then in
which direction will air bubble travel?
(bottom,neck,uniformly spread)
23. A empty bottle(in vaccum) filled with a gas at temp T and press P when the pressure of bottle reaches P
temperature of the gas is _? (T,T/K,TK)
24. Bearing somerfield number _ with load on bearing?
(increases,decreases,no change)
25. Critical radius for a sphere is-(2k/h)
26. Critical radius exist for_ (spherical,cylindrical,both,slab)
27. Convectional resistance/internal resistance is called (biot number)
28. Nusselt no. is? (hl/k)
29. EOQ=?
30 Which statement is true regarding critical path method? (i only one critical path exists for a network, more
than one with same duration,)
31. Shipment cost,inspection cost,storage cost comes under_ (carrying cost ,holding cost,)
27
32. Ischronous governers sensitivity is- (zero,infinite)
33. self energized brakes are-(friction moment acts in the direction of application of force,opposite to the
direction of force, does not need a force to act ,)
34 The ratio of heat capacities for evaporator and condenser is_ (Zero,infinity)
35. when steam and air mixture with partial pressure 0.06 and 0.07 enters a condenser what is the
condenser pressure? (0.06,0.07,0.53,0.03)
36. In pulverized burning of coal heat transfer from boiler to water occurs through_( predominant radiation,
convection, conduction, conduction+convection)
37. Rankine cycle efficiency for same parameters increases mostly with_(reheat, regeneration, super
heating )
38. Ericson cycle with all reversible processes assume_(carnot cycle,stirling,brayton
39. Air delivery tank at outlet of reciprocating compressor is provided for_ (provide constant pressure, avoid
cavitation, )
40. High speed centrifugal pump has _?
(vanes faces in forward direction side,backward,radial vanes)
41. Thermal efficiency in decreasing order_?
(Otto cycle>dual cycle>diesel cycle)
42. When a 1000 K body comes in contact with atmosphere at 300K a loss of 9000 KJ heat is transferred.
The net available energy transferred is_
43. When entropy of a system increases_?
(unavailable energy increases )
44. Rolling is a process widely used for_?
(I section,tubes)
45. Tool nomenclature_?
46. In francis turbine movement of steam?
47. For low power consumption _?
(rake angle should be increased / decreased, nose angle increased/ decreased)
47. Continuous chips occur in_?
(High speeds,low speeds,both,none)
28
48. Primary forces in a reciprocating engine_?
(fully balanced, partially balanced, completely unbalanced, none)
49. In proximate analysis pyrogallol is used for analysis of which element_?
(nitrogen,oxygen)
50. Sulphur content in fuel greatly affects_?
(corrosion)
51. Heat transfer through radiation can be increased by_?
(decreasing emissivity and increases temperature of hot body)
52. which theory of failure clearly explains the failure in case of ductile material?
(Maximun shear stress theory or Guests or trescas theory)
53. When a material is subjected to continuous cycles which limit is being verified?
(Endurance limit)
54. where is stress concentration maximum?
(notches, stress reducing throughcuts)
55. Power transmitted through a belt drive_?
P(T2-T1)
56. According to Eulers theory crippling or buckling load is
(Wcr = Cπ2EI/l2)
57. During sensible heating, specific humidity_?
(remains constant)
58. COP of a refrigerator is _?
(greater than 1 )
59. The maximum temperature in a refrigeration cycle is_?
(less than/greater than/equal to critical temperature)
60. The pressure at the throat of the nozzle_?
(maximum,min)
29
61. for a statically determinate set of forces for equilibrium_?
(Σ f(X),f(Y),f(Z)=0,ΣM=0)
62. For a statically determinate set of forces-
(there r as many equations as the no. of unknowns)
63. 1-2-3 analysis is used for_?
(1.break even analysis, ??)
64. A problem on mean time of service something like a salesman has a rating of 120. considering 10%
allowance time calculate the time required to serve 120???
65. A problem n determining time in a queue??
66. Energy equation for a laminar flow is _?
(Uniform and steady ,non uniform and unsteady)
67. Undercuts in welding occurs due to_?
(low welding current,high welding current)
68. Work holding equipment in shearing??
69. At the centre of a nozzle _?
(Mach no<1>=1;=1)
TATA MOTORS PAPER ON 23rd DECEMBER AT DELHI
TML conducts test for thermal mechanical. And electrical people. some of the mechanical questions I am
writing here .there will be no Aptitude test. with 25% -ve marking. its a 50 questions test for 1 hour. i won't
list the options. some of the questions are:
1. what is the poison’s ratio?
2. when boiler bursts, whom u would inform?
3. modular ratio?
4. envelope of damped free vibration?
5. a ball with a mass M is falling on to the ground with some velocity V1 and raising with velocity V2 .
find the impulse?
6. Contd.. for 5th problem. When time of contact is given then force exerted on the ground.
7. two masses are connecting with string on to pulley coefficient of friction of mass m1 is given and
also m1 and m2 are given. Find the relation b/n m1 and m2 , to make m2 move downwards
8. In a damped free excitation system maximum amplitude occurs
a. before resonance b. after resonance
9. Questions on set screws?
10. A four bar link mechanism is given with moment m acting on crank and also a force given at crank
end. Find the reaction at hinged end of crank.
11. Deflection due to self weight of a uniform rod of diameter D and unit density and length is given .
12. The type of key used in wrist watch?
13. Bending stress is proportional to….? Ans). Section modulus
14. The hypoid gears are …. Ans). Non intersecting non parallel gears.
30
15. Hollow cylinder of outer D0 is given find the diameter of solid cylinder for the same material and
same torsional strength. ?
16. principle plane is ?
17. Two masses are resting on a inclined plane with 30 degree angle and the two masses are welded
with weightless rod and coefficients of friction is given. Find the common acceleration of a two
masses.
18. two masses are of different weights smaller one is placed on the bigger mass. If the force is force is
acting on bigger mass given find the acceleration of smaller mass.
19. Stress on minor diameter of bolt when bolt is subjected to longitudinal force.
20. no of independent elastic constants required for isotropic material?
21. pitch of the bolt of 30 mm metric thread dia meter is?
22. the ratio of natural frequency on earth to moon?
23. upper portion of set screw is given fig shown and asked which type of set screw is ?
24. Efficiency of screw jack formula?
25. which of the parts given is harder one? Ans a). inner case b)outer case like that?
26. Max efficiency of screw jack formula?
27. Given some c/s of diffirent types which is having more torsional strength ?
28. Max principle stress theory is valid for which material?
29. efficiency of reveted joints of different types has given which is having max efficiency ?
30. if the roots are real then which type of vibrations will occur in damped systems ?
31. problem on transmissibility ?
32. when the disc is rotating on which on man is standing at the edge then what is the possibility of
increase in speed of the disc? A).man moves towards centre b)out ward? Like that
33. what is the principle behind the collisions of ball ?which is related to Q.7 ? ans constant linear
momentum.
34. Find the elongation of the bar due to self weight
35. Problem on the cantilever deflection
36. Problem on the two blocks connected by string one is on table and on is hanging from the
pulley…mechanics’ problem
37. Ratio of the tension of the band block breaks
38. max and normal efficiency of the power scew
39. what is monel metal
40. for which material max normal stress theory is used
41. efficiency of the riveted joints
42. coefficient of friction for the greased ball bearing
43. which key is used in wrist watch
44. bending stress is proportional to 1. directly/inversely proportional to section modulus
45. find the width of the strongest beam that can be cut of cylindrical log of wood whose dia is ‘d’
46. if the phi is friction angle then which of the following can not be the value of the tan(phi) a) 0 b) 1.5
mu etc. ans is 0
47. problem on the transmissibility …to calculate dynamic amplitude