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591.

Detonation results in:

A.	Interruption in lubrication	B.	Delay in ignition
C.	Loss of power	D.	All are correct

592.

An indication of ignition quality of diesel fuel is given by:

A.	Octane number	B.	Cetane number
C.	SAE number	D.	All are correct

593.

Removal of burnt gases from engine cylinder is called :

A.	Pre-ignition	B.	Detonation
C.	Scavenging	D.	Supercharging

594.

Lean air fuel mixture is required for:

A.	Starting	B.	Cruising
C.	Idling	D.	All are correct

595.

Cage wheel used in tractor for:

A.	Incresing the weight	B.	Improving traction
C.	Reducing load	D.	Weight transfer

596.

Depreciation of machine value depends on:

A.	Capital investment	B.	Nos. of working hour/year
C.	Savage value	D.	All are correct

597.

Depreciation of machine is computed on its:

A.	Fixed cost	B.	Operating cost
C.	repair and maintenance cost	D.	All are correct

598.

The most accurate dynamometer is:

A.	Prony brake	B.	Hydraulic type
C.	Swinging field type	D.	Eddy current type

599.

Brake mean effective pressure of an engine depends upon its:

A.	Speed	B.	Power
C.	Torque	D.	All are correct

600.

Spark occurs when:

A.	Points open	B.	Points close
C.	Both (a) & (b)	D.	None of these