HYDRAULICS & FLUID MECHANICS QUIZ

Pressure of the order of 10''' torr can be measured by

ionisastion gauge

Bourdon tube

Micro-manometer

Pirani Gauge

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SURFACE TENSION HAS THE UNITS OF

NETON/M

NEWTONS

NEW TONS/M

NEWTONS/M

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The horizontal component of force on a curved surface is equal to the

product of pressure intensity at its centroid and area

weight of liquid vertically above the curved surface

force on the horizontal projection of the curved surface

force on a vertical projection of the curved surface

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At the centre line of a pipe flowing under pressure where the velocity gradient is zero, the shear stress will be

maximum

minimum

could be any value

negative value

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A model of torpedo is tested in a towing tank at a velocity of 25 m/sec. The prototype is expected to attain a velocity of 5 m/sec. What model scale has been used ?

1 : 5

1 :25

1 : 2.5

1:50

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For a floating body to be in stable equilibrium, its metacentre should be

above the center of buoyancy

above the center of gravity.

below the center of buoyancy

between e.g. and center of pressure

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Mercury is often used in barometer because

both (B) and (C)

its vapour pressure is so low that it may be neglected

the height of barometer will be less

it is the best liquid

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In a Sutro weir, the discharge is proportional to (where H is head)

H

H1/2

H3/2

H5/2

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The resultant of all normal pressures acts

vertically upwards

at metacentre

at e.g. of body

at center of pressure

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Coefficient of velocity for Borda’s mouth piece running full is

0.855

0.611

0.707

1.00

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