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251.

Semi-solid lubricant is:

A.	Gear oil	B.	Engine oil
C.	Grease	D.	None of these

252.

If the viscosity of fluid is high then flow will be:

A.	Rapidly	B.	Slowly
C.	Irregular	D.	All are correct

253.

Lubrication oils are rated by:

A.	Gravity	B.	Visocsity
C.	Density	D.	All are correct

254.

Grease is used as lubricant in the:

A.	Engine liner	B.	Universal coupling
C.	Bearings	D.	Both (b) & (c)

255.

Type of pump used in lubrication system:

A.	Diaphragm type	B.	Gear type
C.	Jet pump	D.	Plunger type

256.

Crankcase breather is used for:

A.	Cleaning the dust particles	B.	See the level of oil
C.	Removing water vapour from crankcase	D.	All are correct

257.

In force feed lubrication system, the gear used is:

A.	Helical gear	B.	Spur gear
C.	Both (a) & (b)	D.	None of these

258.

Oil filter of tractor engine is generally changed after:

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

259.

The elements of oil filter is:

A.	Cloth & felt	B.	Paper
C.	Thin metal plate	D.	All are correct

260.

The crankcase breather filter is mostly made of:

A.	Paper	B.	Wire
C.	Oil wetted screen	D.	All are correct