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611.

The power required to run the engine at any given speed without production of useful work is called:

A.	Drawbar power	B.	Indicated horsepower
C.	PTO horsepower	D.	Friction power

612.

Brake horsepower of an engine can be measured by:

A.	Spring dynamometer	B.	Brake dynamometer
C.	Strain gauge dynamometer	D.	All are correct

613.

Revolution of an engine (engine speed) is measured by:

A.	Tachometer	B.	Spring Dynamometer
C.	Eddy current dynamometer	D.	All are correct

614.

Drawbar pull is measured by the:

A.	Prony brake dynamometer	B.	Brake dynamometer
C.	Hydraulic dynamometer	D.	All are correct

615.

Useful life of stationary engine is:

A.	8 years	B.	10 years
C.	12 years	D.	15 years

616.

Engine oil should be changed at every:

A.	50 hours	B.	100 hours
C.	120 hours	D.	150 hours

617.

Tractor transmission oil should be changed at every:

A.	100 hours	B.	300 hours
C.	500 hours	D.	750 hours

618.

Slogging or lugging ability is associated with:

A.	Engine speed	B.	Engine torque
C.	Engine load	D.	All are correct

619.

A device to control the engine speed within specific limit is called:

A.	Carburetor	B.	Governor
C.	Radiator	D.	Differential

620.

The useful life of tractor is:

A.	8,000 hours	B.	10,000 hours
C.	12,000 hours	D.	15,000 hours