HYDRAULICS AND FLUID MECHANICS IN ME QUIZ

A structure used to dam up a stream or river over which the water flows is called

Dam

Weir

Notch

Orifice

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The flow in which the particles of a fluid attain such velocities that vary from point to point in magnitude and direction as well as from instant to instant, is known as

uniform flow

turbulent flow

steady flow

one dimensional flow

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

pitot tube

rotameter

Venturimeter

hot wire anemometer

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Coefficient of resistance is the ratio of

Area of jet at vena-contracta to the area of orifice

Loss of head in the orifice to the head of water available at the exit of the orifice

Actual velocity of jet at vena-contracta to the theoretical velocity

Actual discharge through an orifice to the theoretical discharge

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Any change in load is adjusted by adjusting following parameter on turbine

Blade velocity

Net head

Flow

Absolute velocity

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The length of the divergent cone in a Venturimeter is __________ that of the convergent cone.

Equal to

Three to four times

Five to six times

Double

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The discharge over a triangular notch is

Inversely proportional to H5/2

Directly proportional to H3/2

Inversely proportional to H3/2

Directly proportional to H5/2

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When an internal mouthpiece is running free, the discharge through the mouthpiece is (where a = Area of mouthpiece, and H = Height of liquid above the mouthpiece)

√2gH

0.5 a. √2gH

0.855 a. √2gH

0.707 a. √2gH

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A turbine pump is basically a centrifugal pump equipped additionally with

Vaned diffusion casing

Inlet guide blades

Adjustable blades

Backward curved blades

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The center of pressure of a surface subjected to fluid pressure is the point

on the surface at which gravitational force acis

on the surface at which resultant pres-sure acts

similar to metacentre

at which all hydraulic forces meet

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