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121.

Distance travelled by piston from TDC to BDC is:

A.	Stroke	B.	Bore
C.	Piston displacement	D.	Piston speed

122.

The diesel engine does not have:

A.	Carburettor	B.	Spark plug
C.	Ignition coil	D.	All are correct

123.

As the 'cc' of engine increases, the power of engine will:

A.	Decrease	B.	Increase
C.	Remains same	D.	None of these

124.

Ratio of brake horsepower to indicated horsepower is:

A.	Thermal efficiency	B.	Volumetric efficiency
C.	Mechanical efficiency	D.	Brake efficiency

125.

A gear used in timing gear is:

A.	Spur ger	B.	Bevel gear
C.	Helical gear	D.	Warm gear

126.

Gaskets are made of:

A.	Copper	B.	Asbestos
C.	Fibre	D.	Both (a) & (b)

127.

The gaskets are used to:

A.	Prevent leakage	B.	Prevent dust
C.	Prevent wear	D.	All of above

128.

The total number of rings on piston may vary from:

A.	2 ? 4	B.	3 ? 5
C.	3 ? 7	D.	2 ? 7

129.

A connecting rod of four-stroke engines is subjected to:

A.	Compression and tension	B.	Compression and side thrust
C.	Side thrust only	D.	Compression and twisting

130.

The arrangements of valves used in the engine may be:

A.	I-Head type	B.	T-head type
C.	L-head type	D.	All are correct