Hydraulics and Fluid Mechanics - Civil Engineering - Civil Engineering Questions and Answers

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The equation of continuity holds good when the flow

is steady

is one dimensional

velocity is uniform at all the cross sec-tions

all of the above

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Pitot tube is used for measurement of

pressure

flow

velocity

dsscharge

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Principle of similitude forms the basis of

comparing two identical equipments

designing models so that the result can be converted to prototypes

comparing similarity between design and actual equipment

hydraulic designs

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Select the correct statement.

The absolute roughness of a pipe de-creases with time

A pipe becomes smooth after using for long time

The friction factor decreases with time

The absolute roughness increases with time

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Select the incorrect statement.

The pressure intensity at vena contracta is atmospheric

Contraction is least at vena contracta

Stream lines are parallel throughout the jet at vena contracta

Coefficient of contraction is always less than one

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Kinematic viscosity is equal to

dynamic viscosity/density

dynamicviscosity x density

density/dynamic viscosity

1/dynamicviscosity x density

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The losses are more in

laminar flow

transition flow

turbulent flow

critical flow

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Which of the following instrument can be used for measuring speed of a submarine moving in deep sea

Venturimeter

hot wire anemometer

rotameter

pitot tube

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If mercury in a barometer is replaced by water, the height of 3.75 cm of mercury will be following cm of water

51 cm

50 cm

52 cm

52.2 cm