Hydraulics and Fluid Mechanics - Mechanical Engineering Questions and Answers

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Specific weight of water in S.I. units is equal to

1000 N/m3

10000 N/m3

9.81 × 103 N/m3

9.81 × 10⁶ N/m3

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The specific weight of water in S.I. units is taken as

9.81 kN/m3

9.81 × 103 N/m3

9.81 × 10-6 N/mm3

Any one of these

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A flow is called super-sonic if the

Velocity of flow is very high

Discharge is difficult to measure

Mach number is between 1 and 6

None of these

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One liter of water occupies a volume of

100 cm3

250 cm3

500 cm3

1000 cm3

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The variation in the volume of a liquid with the variation of pressure is called its

Surface tension

Compressibility

Capillarity

Viscosity

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The unit of surface tension is

N/m

N/m2

N/m3

N-m

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Unit of surface tension is

Energy/unit area

Velocity/unit area

Both of the above

It has no units

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Hydrometer is used to determine

Specific gravity of liquids

Specific gravity of solids

Specific gravity of gases

Relative humidity

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The units of dynamic or absolute viscosity are

Metres² per sec

kg sec/meter

Newton-sec per meter

Newton-sec² per meter