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

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cits density is less

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d it provides longer length for a given pressure difference

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For manometer, a better liquid combination is one having______________?


ahigher surface tension

✓


blower surface tension

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csurface tension is no criterion

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d high density and viscosity

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Choose the correct relationship_________________?


aspecific gravity = gravity x density

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bdynamicviscosity = kinematicviscosity x density

✓


cgravity = specific gravity x density

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dkinematicviscosity = dynamicviscosity x density

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Units of surface tension are_________________?


a energy/unit area

✖


bdistance

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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

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d40 x 106 kg/cm2

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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

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cis a function of the curvature of the interface

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d decreases with fall in temperature

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


a1000

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b2100

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c2700

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d21,000.

✓


View Answer 21,000.

The bulk modulus of elasticity __________________?


ahas the dimensions of 1/pressure

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b increases with pressure

✓


c is large when fluid is more compressible

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dis independent of pressure and viscosity

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Viscosity of water in comparison to mercury is ______________________?


ahigher

✓


blower

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csame

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d higher/lower depending on temperature

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View Answer higher

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


aremains same

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bincreases

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cdecreases

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dshows erratic behaviour

✓



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