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71.

The specific weight of a substance has the units

A.	N/m3	B.	kg/m3
C.	N/m2	D.	kg/m2

72.

The pressure in the air space above an oil (specific gravity = 1.2) surface in a tank is 2 psi. The pressure 6 ft below the surface of oil in feet of water is

A.	9.62	B.	45.83
C.	11.82	D.	7.2

73.

The pressure at a point in a static or uniformly moving fluid is equal in all directions. This statement is known as

A.	Newtons law of gravitation	B.	Archimedes principle
C.	Paseal law	D.	Toricellis theorem

74.

Pressure at a point in a static mass of liquid

A.	depends upon specific weight of liquid and depth below the free liquid survace	B.	depends upon the shape of the boundary container
C.	depends upon the size of the boundary container	D.	is the same for all liquids.

75.

Gage pressure is given by

A.	absolute pressure ?local atmospheric pressure	B.	absolute pressure + local atmospheric pressure
C.	standard atmospheric pressure?vacuum pressure	D.	standard atmospheric pressure + vacuum pressure

76.

The recommended air pressure in the back tyre of Vijay Super Scooter is 30 psig. Assuming that the atmospheric pressure is 14.7 psia what is the absolute pressure in kilopascals?

A.	207	B.	308
C.	2310	D.	66600

77.

Select the three pressures that are not equivalent

A.	14.696 psi 29.92 in. Hg 33.94 ft H2O	B.	14.696 psi 29.92 in. Hg 1.01325 bar
C.	29.92 in Hg 33.94 ft H2O 1.01325 x 105 N/m2	D.	29.92 in Hg 2116 psf 1.01325 Pa.

78.

For the standard atmosphere upto the stratosphere temperature of air decreases uniformly at the rate of

A.	0.65?C/m	B.	0.065?C/m
C.	0.0065?C/m	D.	0.00065?C/m

79.

Mercury is generally used in manometer for measuring

A.	very low pressures only	B.	low pressures accurately
C.	large pressures only	D.	all pressures except the small ones

80.

Manometers are important devices for measuring

A.	absolute pressures	B.	vacuum pressures
C.	local atmospheric pressures	D.	pressure differences