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491.

An accumulator also serves as:

A.	Shock absorber	B.	Pump
C.	Both (a) & (b)	D.	None of these

492.

A type of valve used in hydraulic system is:

A.	Control valve	B.	Relief valve
C.	Priority valve	D.	All are correct

493.

Mass per unit volume of substance is called :

A.	Specific gravity	B.	Density
C.	Mass density	D.	None of these

494.

Ratio of mass density of substance at certain temperature to the mass density of water at same temperature is called:

A.	Specific gravity	B.	Density
C.	Specific weight	D.	None of these

495.

Specific gravity of petroleum-based hydraulic fluid is:

A.	0.5	B.	0.7
C.	0.8	D.	None of these

496.

Mass density increases as:

A.	Pressure increase	B.	Pressure decrease
C.	Temperature increase	D.	Temperature decreases

497.

Mass density decreases with:

A.	Temperature increase	B.	Temperature decrease
C.	Both (a) & (b)	D.	None of these

498.

Amount of het required to raise the temperature of a unit mass by one degree is called:

A.	Specific gravity	B.	Thermal conductivity
C.	Specific heat	D.	Viscosity

499.

Nudging system is used for:

A.	Rising implement	B.	Lower the implement
C.	Both (a) & (b)	D.	None of these

500.

An automatic position control system is associated with:

A.	Two point hitch	B.	Three point hitch
C.	Both (a) & (b)	D.	None of these