Mechanical Engineering Quiz - Set 10 - ObjectiveBooks

Mechanical Engineering Quiz - Set 10

Quiz Questions

01. The ratio of the _________ to the volume at cut-off is called expansion ratio.

02. Liquid fuels have lower efficiency than solid fuels.

03. The clearance, in a single stage, single acting reciprocating air compressor does not affect the workdone on the air and the power required for compressing the air.

04. 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.

05. The steel produced by cementation process is known as __________ steel.

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

07. 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.

08. 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.

09. 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.

10. The free expansion process is __________ non-flow process.

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

12. PERT is a project planning and control technique.

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

14. The two stroke cycle engines have lighter flywheel.

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

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

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

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

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

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

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