Here I am providing you Previous Years Question Papers (Mechanical Engineering) of BHEL Supervisor Trainee Exam.


Question Papers (Mechanical) of BHEL Supervisor Trainee Exam:

1. Euler’s load for columns (end conditions)
2. Relation b/w longitudinal stress nd Hoops stress (thin cylindrical shell)
3. First atomic power plant in India?
4. Drawing paper sizes:A0,A1,A2,A3,A4
5. In an electrolytic soln conduction takes place by…….
6. Problem in natural nd induced frequency……
7. Stud diameter for Boilers in Thermal Power plant…..
8. Kinematic pair…..
9. Rake angle….
10. Double bucket is used in which turbine……
11. If original size of a drawing was reduced to half, what is the scale size……
12. TIG welding process is used for which Metal…….
13. Laser is produced from which of the following…..(ruby, diamond, titanium, gold)
14. 8085 microprocessor is what bit……(4,8,16,32)
15. Problem in friction…..
16. In shafts operating at very high temp what s the lubricant used…..
17. For mass production which of the following process is preferable…(process, product, line)
18. Dynamometer s used to measure……
19. In casting, the content of the facing sand used is,,,,,
20. Boundary layer property,,,,,,
21. Formula for two springs in series…..
22. Nu=f(Pr,Gr)
23. First law of thermodynamics….(Q=W+dE)
24. Transistors-(CE,CB) qns2
25. npn diodes,,,,dopin(2qns)
26. Power Factor(2 problems)
27. 1 qn from IC chip
28. Which s the universal gate among the following (AND,OR,NAND,Ex-OR)
29. Semiconductor Material among following…..(germanium,gold,copper,silica)
30. Current, 2 resistance in series,,,,find voltage,,,
31. In car battery Voltage used was….
32. Material used for making high speed bearings,,,,,


A) Technical
B) Aptitude
Both parts consists 120 marks each. There is negative marking which 0.2.
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 =
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

1. The ratio of two specific heats of air is equal to. = 1.41
2. A perfect gas at 270C is heated at constant pressure till its volume is double. The final
temperature is = 3270C
3. 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
4. Internal energy of a substance depends on = Temperature
5. Work done in compressing 1kg of gas adiabatically from p1,V1,T1 to p2, V2, T2 is equal to =
Cv(T2-T1)
6. The unit of entropy is = J/kg 0K
7. Indicated power of a 4-stroke engine is equal to = pLAN/2
8. 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)
9. 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)
10. The spark plug gap is normally maintained at: = 0.45 to 0.6mm
11. A distributor in spark ignition engines performs the function of : = Providing the correct firing
order in engine
12. Which of the following does not relate to C.I. engine:: a) fuel pump b) fuel injector c) governor
d) carburetor e) flywheel = (d)
13. Air fuel ratio in a jet engine is = 60:1
14. What is the value of Prandtl No.?
15. In domestic refrigerator, the tubes at the back of the refrigerator are: a) evaporator b) condenser
c) capillary tubes d)………
16. Which refrigerants has the highest critical point temperature. = Freon-11
17. Wet bulb temperature is. = indication of amount of moisture in air
18. On psychrometric chart, dry bulb temperature lines are. = Vertical
19. Surface tension has the units. = newtons/m
20. The line of action of the buoyant force acts through the. =centroid of the displaced volume of
fluid
21. A pressure of 25m of head of water is equal to. =245kN/m2
22. For a submerged body to be in stable equilibrium, the centre of gravity should be. =Below the
centre of buoyancy.
23. The actual velocity at vena contracta for flow through an orifice from a reservoir of height H=?.
=Cv√2gH
24. A body weighing 2kg in air weights 2.5kg when submerged in water. Its specific gravity is. = 6
25. In a free vortex motion: = each particle moves in a circular path with a speed varying inversely
as the distance from the centre.
26. 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
27. 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.
28. 10m of water column is equal to = 100kN/m2
29. M.I. of a circular area about an axis perpendicular to the area is: = πr4/2
30. A projectile is fired at an angle θ to the vertical. Its horizontal range will be maximum when θ is
. =450
31. 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.
32. 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
33. A car is moving with a velocity of 60km/hr and possesses energy of 5x105 joules. The mass of
the car will be. =3000kg.
34. 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
35. 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.
36. 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
37. 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
38. 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.
39. Automobile steering gear is an example of: = lower pair.
40. The type of coupling used to join two shafts whose axes are neither in same straight line nor
parallel, but intersect is. = Universal coupling.
41. To transmit power from one rotation shaft to another whose axes are neither parallel nor
intersecting, use: = Spiral gear.
42. 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.
43. The secondary critical speed of a shaft occurs at: = twice the speed of primary critical speed.
44. Brittle coating technique is used for: = experimental stress analysis.
45. Factor of safety is the ratio of: = yield stress/working stress.
46. Type of gear used for non-intersection perpendicular shafts: = Hypoid gears.
47. Corrosion resistance of steel is increased by adding: = Chromium & Nickel
48. The product of Cupola is called: = cast iron
49. Brinell tester uses a hardness steel ball of size: = 10mm
50. Sintered and tungsten carbides can be machined by: = EDM
51. What kind of abrasive cut off wheel should be used to cut concrete, stone and masonry?
=Diamond grit.
52. In break-even analysis, total cost consists of: = Fixed cost + Variable cost.
53. The amount deducted from the salary of workers towards employees provident fund is :
=deposited in the account of worker with Provident Fund Commissioner.
54. PERT is: = event oriented technique
55. Bar charts are suitable for: = minor works.
56. on a PERT/CPM chart represents: = a significant event representing some mile-stone
57. Electron volt is the unit of : = Energy.
58. Seamless tubes are made by?
59. Reheating in gas turbine results in: = increase of work ratio and decrease of thermal efficiency.
60. Why DC current is not used in transformer?
61. What is the purpose of draft tube in hydraulic turbines: = to convert the kinetic energy into
pressure energy.
62. 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?
63. 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?