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171.

Primary objective of graded terrace is to:

A.	Reduce the field slope length	B.	Remove runoff with non-erosive way
C.	Both (a) & (b)	D.	None of these

172.

The API gravity of light diesel oil is:

A.	22	B.	25
C.	40	D.	50

173.

The API gravity of petrol is:

A.	61	B.	65
C.	70	D.	80

174.

The API of high-speed diesel is:

A.	25	B.	31
C.	40	D.	50

175.

The quality of fuel is judged by:

A.	Colour	B.	Volatility
C.	Both (a) & (b)	D.	None of these

176.

The volatility of fuel effects:

A.	Efficiency of engine	B.	Power of engine
C.	Speed of engine	D.	All are correct

177.

The vaporizing temperature of petrol fuel is:

A.	Higher than diesel fuel	B.	Lower than diesel fuel
C.	Equal to diesel fuel	D.	None of these

178.

Molecular formula of diesel is:

A.	C11H15	B.	C11 H16
C.	C12 H15	D.	C11H14

179.

High speed diesel is used in:

A.	High speed diesel engine	B.	Low speed diesel engine
C.	Petrol engine	D.	Aircraft engine

180.

The specific gravity of fuel is measured by:

A.	Hygrometer	B.	Thermometer
C.	Hydrometer	D.	All are correct