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Govt Job Papers - Public Sector Units (PSUs) Exam Papers
Article Index
BHEL Electrical Question Papers 2008
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1. The ratio of two specific heats of air is equal to. = 1.41
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. A perfect gas at 270C is heated at constant pressure till its volume is double. The final temperature is = 3270C

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. Indicated power of a 4-stroke engine is equal to = pLAN/2

7. The unit of entropy is = J/kg 0K

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. Air fuel ratio in a jet engine is = 60:1
10. 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)
11. A distributor in spark ignition engines performs the function of : = Providing the correct firing order in engine
12. The spark plug gap is normally maintained at: = 0.45 to 0.6mm

13. Which of the following does not relate to C.I. engine:: a) fuel pump b) fuel injector c) governor d) carburetor e) flywheel = (d)

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. Wet bulb temperature is. = indication of amount of moisture in air

17. Which refrigerants has the highest critical point temperature. = Freon-11

18. On psychrometric chart, dry bulb temperature lines are. = Vertical

19. The line of action of the buoyant force acts through the. =centroid of the displaced volume of fluid
20. Surface tension has the units. = newtons/m



 
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