HYDRAULICS AND FLUID MECHANICS IN ME QUIZ

Mercury does not wet glass. This is due to property of liquid known as

adhesion

surface tension

cohesion

viscosity

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The unit of surface tension is

N/m

N-m

N/m2

N/m3

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The pressure measured with the help of a pressure gauge is called

Absolute pressure

Gauge pressure

Atmospheric pressure

Mean pressure

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Two pipe systems can be said to be equivalent, when the following quantites are same

friction loss and flow

length and diameter

friction factor and diameter

flow and length

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The maximum hydraulic efficiency of an impulse turbine is (where φ = Angle of blade tip at outlet)

(1 + sin φ)/2

(1 - cos φ)/2

(1 + cos φ)/2

(1 - sin φ)/2

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The buoyancy depends on

viscosity of the liquid

mass of liquid displaced

depth of immersion

pressure of the liquid displaced

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The ratio of the inertia force to the __________ is called Euler's number.

Surface tension force

Elastic force

Pressure force

Viscous force

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A right circular cylinder open at the top is filled with liquid and rotated about its vertical axis at such a speed that half the liquid spills out, then the pressure intensity at the center of bottom is

zero

one-fourth its value when cylinder was full

cannot be predicted from the given data

one-half its value when cylinder was full

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When a tank containing liquid moves with an acceleration in the horizontal direction, then the free surface of the liquid

Becomes curved

Falls on the back end

Falls on the front end

Remains horizontal

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The weight per unit volume of a liquid at a standard temperature and pressure is called

Specific gravity

None of these

Mass density

Specific weight

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