Mechanical Engineering MCQ Quiz - Multiple Choice Questions & Answers Page 2

11. CNG is an excellent for

1. petrol engine
2. Kerosene engine
3. Diesel engine
4. All of above

12. Cochran boiler is .

1. Vertical boiler
2. Natural circulation boiler
3. Fire tube boiler
4. All Of above

13. Compressor in which compression of air from suction pressure to delivery pressure takes place in more than one cylinder is called compressor.

1. Single acting
2. Double acting
3. Single stage
4. Multi stage

14. Compressor is a machine which is used to do

1. lift liquid from low height to higher elevation
2. To store liquid
3. To compress gas.
4. none of the above

15. Dryness fraction of wet steam is

1. greater than 1
2. less than 1
3. #NAME?

16. During adiabatic process

1. heat transfer is zero
2. enthalpy remains constant
3. work transfer is zero
4. enthalpy change is zero.

17. During compression process which parameter will change?

1. Pressure
2. Volume
3. Density
4. All Of above

18. For earth moving machines, widely used engines are:

1. Petrol engine
2. Steam engine
3. Diesel engine
4. Gas engine

19. Function of piston rings is

1. To connect piston and connecting road
2. To transmit force from piston to crank
3. To maintain a gas tight between the piston and the cylinder
4. To convert reciprocating motion into rotary motion

20. If xl and x2 are the dryness fractions obtained in separating calorimeter and throttling calorimeter respectively, then actual dryness fraction of steam is

1. XI - X2
2. XI + X2 /2
3. X1 + X2
4. X1 * X2