Civil Engineering MCQs

Page No. 19

Alcohol is used in manometer, because___________________?


a its vapour pressure is low


b it provides suitable meniscus for the inclined tube


cits density is less


d it provides longer length for a given pressure difference



For manometer, a better liquid combination is one having______________?


ahigher surface tension


blower surface tension


csurface tension is no criterion


d high density and viscosity



Choose the correct relationship_________________?


aspecific gravity = gravity x density


bdynamicviscosity = kinematicviscosity x density


cgravity = specific gravity x density


dkinematicviscosity = dynamicviscosity x density



Units of surface tension are_________________?


a energy/unit area


bdistance


cboth of the above


dit has no units


View Answer both of the above

A liquid compressed in cylinder has a volume of 0.04 m3 at 50 kg/cm2 and a volume of 0.039 m3 at 150 kg/cm2. The bulk modulus of elasticity of liquid is _________________?


a400 kg/cm2


b4000 kg/cm2


c40 x 105 kg/cm2


d40 x 106 kg/cm2


View Answer 4000 kg/cm2

Surface tension _____________________?


aacts in the plane of the interface normal to any line in the surface


b is also known as capillarity


cis a function of the curvature of the interface


d decreases with fall in temperature



The value of the coefficient of compressibility for water at ordinary pressure and temperature in kg/cm is equal to _________________?


a1000


b2100


c2700


d21,000.


View Answer 21,000.

The bulk modulus of elasticity __________________?


ahas the dimensions of 1/pressure


b increases with pressure


c is large when fluid is more compressible


dis independent of pressure and viscosity



Viscosity of water in comparison to mercury is ______________________?


ahigher


blower


csame


d higher/lower depending on temperature


View Answer higher

For very great pressures, viscosity of moss gases and liquids __________________?


aremains same


bincreases


cdecreases


dshows erratic behaviour



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