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55.

The specific weight of water is 1000 kg/m"

A.	at norma] pressure of 760 mm	B.	at 4°C temperature
C.	at mean sea level	D.	all the above

56.

The stress-strain relation of the newtoneon fluid is

A.	linear	B.	parabolic
C.	hyperbolic	D.	inverse type

57.

The surface tension of mercury at normal temperature compared to that of water is

A.	more	B.	less
C.	same	D.	more or less depending on size of glass tube

58.

The tendency of a liquid surface to contract is due to the following property

A.	cohesion	B.	adhesion
C.	viscosity	D.	surface tension

59.

The total pressure on the surface of a vertical sluice gate 2 m x 1 m with its top 2 m surface being 0.5 m below the water level will be

A.	500 kg	B.	1000 kg
C.	1500 kg	D.	2000 kg

60.

The units of dynamic or absolute viscosity are

A.	metres2 per sec	B.	kg sec/metre
C.	newton-sec per metre	D.	newton-sec2 per metre

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