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651.

An engine is called I head engine when:

A.	Valves are immediately above the cylinder	B.	Both valves are on one side
C.	Valves are in opposite direction	D.	None of these

652.

A steam engine is an:

A.	Spark ignition engine	B.	Compression ignition engine
C.	External combustion engine	D.	IC engine

653.

In hydraulically control hitching system, the equpment vibrates due to:

A.	Lower oil level	B.	Clogging of oil filter
C.	Trapping of air in oil filter	D.	All are correct

654.

Engine in which heat is taken at one constant pressure and rejected at another constant pressure is:

A.	Otto cycle	B.	Auto cycle
C.	Diesel cycle	D.	Petrol cycle

655.

The total swept volume of all pistons during power strokes occurring in one minute is:

A.	Piston volume	B.	Clearance volume
C.	Displacement volume	D.	None of these

656.

When crankshaft of the engine completes one cycle, the camshaft completes:

A.	Two revolution	B.	Half revolution
C.	Equal revolution of crankshaft	D.	None of these

657.

The camshaft gear is called:

A.	Two time gear	B.	One time gear
C.	Halftime gear	D.	None of these

658.

Tractive efficiency is affected by:

A.	Slope of land	B.	Wheel size
C.	Height of hitch	D.	All are correct

659.

In hydraulically controlled hitching system, the implement does not remain in lifted position due to:

A.	Defective valve	B.	Oil leakage
C.	Both (a) & (b)	D.	Lower oil lever

660.

The stroke bore of tractor engine varies from:

A.	1 to 1.45	B.	1 to 2
C.	1.45 to 2	D.	2 to 2.45