Question # 1

The product of cross-sectional area of the pipe and the fluid speed at any pint along the pipe is

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very high

very low

constant

zero

The body will move with terminal velocity when it acquires

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minimum speed

zero speed

maximum speed

none of them

Which of the following is a characteristic of an ideal fluid?

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it is non-viscous

it is incompressible

it's motion is steady

all of the above

The fluid is incompressible, if itsdensity is

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zero

constant

very high

very small

N s m^-2is unit of:

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Drag force

Pressure

Surface tension

Coefficient of viscosity

In a normal healthy person the value of systolic pressure is

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75 torr

80 torr

120 torr

all of them

When the droplet moves with terminal velocity in a fluid, the net force acting on the droplet is:

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F_D-mg

Zero

mg-F_D

None of these

The resistance offered by a fluid to a solid moving inside it is called:

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Drag force

Surface force

Viscosity

None of these

Bernoulli's equation is based upon law of conservation

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Mass

Momentum

Energy

None of these

The equation of continuity is

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A₁A_{2 = V}₁V₂

A_1/_V_{1 =}A_2/V₂

_V_1/A₁₌V_2/A₂

A₁_V_{1 =}A₂V₂

When the velocity of a liquid flowing steadily in a tube increases, its pressure?

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Decreases

Increases

Remains same

Zero

The un-steady streamline flow is called

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laminar flow

turbulent flow

both of them

none of them

During the steady flow, different streamlines

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cannot across each other

can across each other

either of them

neither of them

When the different streamlines cannot cross each other, then this condition is known as

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continuity condition

turbulent flow condition

steady flow condition

none of them

When there is no internal frictional forces between the adjacent layers of fluid, then the fluid is called

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incompressible

compressible

viscous

non viscous

A container has a small hole in the bottom. Air can go through this hole,but water cannot. This can be best explained by the statement that

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water contains hydrogen atoms, air does not

water molecules are smaller than molecules in the air

surface tension of the water prevents it from

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ECAT Physics Chapter 6 Fluid Dynamics Online Test MCQs With Answers

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