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4

An average value of coefficient of velocity is

A. 0.62

B. 0.76

C. 0.84

D. 0.97

Correct Answer :

D. 0.97


Related Questions

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4

The velocity through a channel of circular section will be maximum when the depth of water is __________ the diameter of the circular channel.

A. 0.34 times

B. 0.67 times

C. 0.81 times

D. 0.95 times

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4

A flow through an expanding tube at constant rate is called

A. Steady uniform flow

B. Steady non-uniform flow

C. Unsteady uniform flow

D. Unsteady non-uniform flow

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4

The specific gravity of water is taken as

A. 0.001

B. 0.01

C. 0.1

D. 1

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4

The intensity of pressure at any point, in a liquid, is __________ to the depth of liquid from the surface.

A. Equal

B. Directly proportional

C. Inversely proportional

D. None of these

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4

Dynamic viscosity of most of the liquids with rise in temperature

A. Increases

B. Decreases

C. Remain unaffected

D. Unpredictable

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4

According to Manning's formula, the discharge through an open channel is (where M = Manning's constant)

A. A × M × m1/2 × i2/3

B. A × M × m2/3 × i1/2

C. A1/2 × M2/3 × m × i

D. A2/3 × M1/3 × m × i

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4

An object having 10 kg mass weighs 9.81 kg on a spring balance. The value of 'g' at this place is

A. 10 m/sec²

B. 9.81 m/sec²

C. 9.75 m/sec²

D. 9 m/sec

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4

The total pressure on an immersed surface inclined at an angle θ with the liquid surface is

A. wA

B. wx

C. wAx

D. wAx/sinθ

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4

The depth of the centre of pressure on a vertical rectangular gate 8 m wide and 6 m high, when the water surface coincides with the top of the gate, is

A. 2.4 m

B. 3.0 m

C. 4.0 m

D. 5.0 m

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4

The pressure of air __________ with the increase of height from the surface of the earth.

A. Does not change

B. Decreases

C. Increases

D. None of these

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4

Pitot tube is used for measurement of

A. Pressure

B. Flow

C. Velocity

D. Discharge

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4

A hydraulic press has a ram of 15 cm diameter and plunger of 1.5 cm. It is required to lift a weight of 1 tonne. The force required on plunger is equal to

A. 10 kg

B. 100 kg

C. 1000 kg

D. 1 kg

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4

A glass tube of smaller diameter is used while performing an experiment for the capillary rise of water because

A. It is easier to see through the glass tube

B. Glass tube is cheaper than a metallic tube

C. It is not possible to conduct this experiment with any other tube

D. All of the above

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4

The fluid forces considered in the Navier Stokes equation are

A. Gravity, pressure and viscous

B. Gravity, pressure and turbulent

C. Pressure, viscous and turbulent

D. Gravity, viscous and turbulent

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4

Buoyant force is

A. The resultant force acting on a floating body

B. The resultant force on a body due to the fluid surrounding it

C. Equal to the volume of liquid displaced

D. The force necessary to maintain equilibrium of a submerged body

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4

Non uniform flow occurs when

A. The direction and magnitude of the velocity at all points are identical

B. The velocity of successive fluid particles, at any point, is the same at successive periods of time

C. Velocity, depth, pressure, etc. change from point to point in the fluid flow.

D. The fluid particles move in plane or parallel planes and the streamline patterns are identical in each plane

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4

For a body floating in a liquid the normal pressure exerted by the liquid acts at

A. Bottom surface of the body

B. C.G. of the body

C. Metacentre

D. All points on the surface of the body

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4

Water is a __________ fluid.

A. Real

B. Ideal

C. Newtonian

D. Non-Newtonian

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4

Fluid is a substance which offers no resistance to change of

A. Pressure

B. Flow

C. Shape

D. Volume

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4

The total energy of each particle at various places in the case of perfect incompressible fluid flowing in continuous stream

A. Keeps on increasing

B. Keeps on decreasing

C. Remain constant

D. May increase/decrease

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4

For manometer, a better liquid combination is one having

A. Higher surface tension

B. Lower surface tension

C. Surface tension is no criterion

D. High density and viscosity

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4

An internal mouthpiece is said to be running __________ if the length of the mouthpiece is more than three times the diameter of the orifice.

A. Free

B. Partially

C. Full

D. None of these

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4

Which of the following is an example of laminar flow?

A. Underground flow

B. Flow past tiny bodies

C. Flow of oil in measuring instruments

D. All of these

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4

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)

A. 0.5 a. √2gH

B. 0.707 a. √2gH

C. 0.855 a. √2gH

D. a. √2gH

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4

In a free vortex motion, the radial component of velocity everywhere is

A. Maximum

B. Minimum

C. Zero

D. Nonzero and finite

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4

The buoyancy depends on

A. Mass of liquid displaced

B. Viscosity of the liquid

C. Pressure of the liquid displaced

D. Depth of immersion

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4

Ratio of inertia force to surface Jension is known as

A. Mach number

B. Froude number

C. Reynoldss number

D. Weber's number

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4

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

A. Below the center of gravity

B. Below the center of buoyancy

C. Above the center of buoyancy

D. Above the center of gravity

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4

Gradually varied flow is

A. Steady uniform

B. Non-steady non-uniform

C. Non-steady uniform

D. Steady non-uniform

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4

The tangential velocity of the water element having a free vortex is

A. Directly proportional to its distance from the centre

B. Inversely proportional to its distance from the centre

C. Directly proportional to its (distance)2 from the centre

D. Inversely proportional to its (distance)2 from the centre