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71.

Oil pump is driven by:

A.	Oil pump is driven by:	B.	Timing gear
C.	Crankshaft	D.	All are correct

72.

The compression pressure of diesel engine varies from:

A.	8-10 kg/sq. cm	B.	10-40 kg/sq. cm
C.	35-50 kg/sq. cm	D.	45-50 kg/sq. cm

73.

Flywheel is made of:

A.	Cast iron	B.	Aluminiumalloy
C.	High carbon steel	D.	All are correct

74.

The stroke bore ratio of tractor engines varies from:

A.	1.0 to 1.5	B.	1.0 to 1.25
C.	1.0 to 1.35	D.	1.0 to 1.45

75.

The inlet valve of four-stroke engine opens at:

A.	5" before TDC	B.	10" before TDC
C.	15" before RDC	D.	20" before TDC

76.

Working temperature of diesel engine ranges from:

A.	71-82?C	B.	82-88?C
C.	75-80?C	D.	None of these

77.

Working temperature of petrol engine ranges from:

A.	71-82?C	B.	82-88?C
C.	75-80?C	D.	None of these

78.

White smoke indicates:

A.	Presence of water in fuel	B.	Burning of lubricant in cylinder
C.	Presence of waer in lubricant	D.	Rich air and fuel mixter

79.

Blue smoke indicates:

A.	Presence of water in fuel	B.	Burning of lubricant in cylinder
C.	Presence of waer in lubricant	D.	Rich air and fuel mixter

80.

The specific fuel consumption of diesel engine is:

A.	More than petrol engine	B.	Less than petrol engine
C.	Equal to petrol engine	D.	None of these