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31.

In diesel engine, the compression ratio in comparison to expansion ratio is

A.	same	B.	less
C.	(G) more	D.	variable

32.

It the temperature of intake air in IC engines is lowered, then its efficiency will

A.	increase	B.	decrease
C.	remain same	D.	increase upto certain limit and then decrease

33.

Most high speed compression engines operate on

A.	Otto cycle	B.	Diesel cycle
C.	Dual cycle	D.	Carnot cycle

34.

Pick up the wrong statement about supercharging

A.	supercharging reduces knocking in diesel engines	B.	there can be limited supercharging in petrol engines because of detonation
C.	supercharging at high altitudes is essential	D.	supercharging results in fuel economy

35.

Polymerisation is a chemical process in which molecules of a compound become

A.	larger	B.	slowed down
C.	smaller	D.	liquid

36.

Pour point of fuel oil is the

A.	minimum temperature to which oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame	B.	temperature at which it solidifies or congeals
C.	it catches fire without external aid	D.	indicated by 90% distillation temperature i.e., when 90% of sample oil has distilled off

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