Question # 1

A flowing liquid possess

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K.E

P.E

Pressure Energy

All

In a normal healthy person the value of systolic pressure is

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75 torr

80 torr

120 torr

all of them

If water rises 4 cm in a long, thin tube because of capillary action, then, under corresponding conditions of use, the rise (in the tube) of a liquid whose density is 2 g/cm²will be

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1 cm

2 cm

8 cm

None

Two water pipes of diameters 4 cm and 8 cm are connected with a supply line. The velocity of flow of water in the pipe 4 cm diameter is

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1/4 times

4 times

Twice

1/2 of 8 cm diameter pipe

An object moving through a fluid experiences a retarding force called a

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frictional force

terminal force

opposing force

drag force

Surface tension of water is due to

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Inter molecular attractions

Inter molecular spaces

Inter molecular repulsion

None of above

Fluids resist force, This property is called

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Stiffness

Strength

Ductility

Elasticity

The un-steady streamline flow is called

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laminar flow

turbulent flow

both of them

none of them

Blood is an

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Compressible fluid

incompressible fluid

hard

none of them

A person standing near the track of a fast moving train has tendency to fall towards it because of

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Vibration due to motion of train

Gravitation force of attraction between person and trains

The high speed of train

Some other effect

The law of conservation of mass gives us the

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equation of continuity

Bernoulli's theorem

both of them

none of them

In deriving the Bernoulli's equation, we assume that the fluid is

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incompressible

no viscous

flows in a steady manner

all of them

The study of fluid in motion basically involves law of conservation of:

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Mass

Energy

Change

Both A and C

Both A and B

A tube tapers from 20 cm diameter to 2 cm, the velocity at first cross-section is 50 ms^-1then velocity at second cross-section is

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5000 cms^-1

500 cms^-1

50 cms^-1

0.5 cm/s

The velocity of falling raindrops attains limited value because of

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Up thrust of air

Air currents of the earth atmosphere

Surface tension effect

Viscous force exerted by air

The drag force acting on a spherical droplet of radius 10^-5m moving with a velocity of 1 cm/sec in a fluid of velocity 5.31 x 10^-7m/sec. The units comes out to be:

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10^-16N

10^-14N

10^-12N

10^-10N

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Physics ECAT Pre Engineering Chapter 6 Fluid Dynamics Online Test MCQs With Answers

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