197) The overall efficiency is defined as the ratio of the work obtained at the crankshaft in a given time to the energy supplied during the same time.

Right

Wrong

Answer is:

Right

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198) The cetane number of diesel oil, generally available, is

20 to 25

25 to 30

30 to 40

40 to 55

Answer is:

40 to 55

199) The object of providing masked inlet valve in the air passage of compression ignition engines is to

enhance flow rate

control air flow

induce primary swirl

induce secondary turbulence

Answer is:

induce primary swirl

200) During suction stroke of a four stroke petrol engine, the inlet valve opens and the charge is sucked into the cylinder as the piston moves upwards from the bottom dead centre.

Right

Wrong

Answer is:

Wrong

201) The power actually developed by the engine cylinder of an I.C. engine is known as

theoretical power

actual power

indicated power

none of these

Answer is:

indicated power

Explanation:

Indicated Power is defined as the power developed by combustion of fuel inside the engine cylinder. It is always more than brake power. Therefore, the difference between IP and BP indicates the power loss in the mechanical components of engine due to friction.

The power actually developed by the engine cylinder of an I.C. engine is known as

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