Mechanical Engineering Quiz - Set 10


1. The ratio of the _________ to the volume at cut-off is called expansion ratio.
Swept volume
Clearance volume

2. Liquid fuels have lower efficiency than solid fuels.
True
False

3. The clearance, in a single stage, single acting reciprocating air compressor does not affect the work-done on the air and the power required for compressing the air.
True
False

4. The motion of the cam is transferred to the rocker arm, moving it upwards and downwards. This rocker arm motion then forces the valve downwards against the force in the valve spring so that the valve can open.
True
False

5. The steel produced by cementation process is known as __________ steel.
Blister
Crucible

6. During gas charging in an ammonia vapour compression system, the connection is made at the compressor outlet.
Agree
Disagree

7. If the Francis turbine is run below 50 percent head for a long period, it will not only lose its efficiency but also the cavitation danger will become more serious.
Agree
Disagree

8. The compression ratio in petrol engines is kept low as compared to diesel engines because higher compression ratio in petrol engines would lead to pre-ignition of fuel.
Agree
Disagree

9. When slack of an activity is zero, the activity is critical and any delay in its performance will delay the completion of the whole project.
Yes
No

10. The free expansion process is _________ non-flow process.
Reversible
Irreversible

11. In a universal milling machine, the table can be swivelled horizontally and can be fed at an angle to the milling machine spindle.
True
False

12. PERT is a project planning and control technique.
Yes
No

13. In an isolated system, neither the heat and work nor the mass of the working substance crosses the boundary of the system.
True
False

14. The two stroke cycle engines have lighter flywheel.
Agree
Disagree

15. In a centrifugal pump, the water enters the impeller ________ and leaves the vanes axially.
Axially
Radially

16. The process of removing moisture from the air, without change in its dry bulb temperature, is called dehumidification.
Correct
Incorrect

17. Duralumin has better strength than Y-alloy at high temperature.
True
False

18. Air motors work on the cycle which is the reverse of the reciprocating air compressor cycle.
Agree
Disagree

19. The tool life, in case of continuous cutting, is much better than intermittent cutting.
Agree
Disagree

20. A good steam boiler is one which produces maximum quantity of steam with the given fuel
Agree
Disagree

     Score =

Correct answers:


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