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4

The flow which neglects changes in a transverse direction is known as

A. One dimensional flow

B. Uniform flow

C. Steady flow

D. Turbulent flow

Correct Answer :

A. One dimensional flow


Related Questions

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4

The centre of gravity of the volume of the liquid displaced by an immersed body is called

A. Centre of gravity

B. Centre of pressure

C. Metacentre

D. Centre of buoyancy

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4

An open vessel of water is accelerated up an inclined plane. The free water surface will

A. Be horizontal

B. Make an angle in direction of inclination of inclined plane

C. Make an angle in opposite direction to inclination of inclined plane

D. Any one of above is possible

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4

A flow whose streamline is represented by a straight line, is called __________ dimensional flow.

A. One

B. Two

C. Three

D. Four

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4

The unit of dynamic viscosity in S.I. units is

A. N-m/s2

B. N-s/m2

C. Poise

D. Stoke

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4

A perfect gas

A. Has constant viscosity

B. Has zero viscosity

C. Is in compressible

D. None of the above

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4

A tank of uniform cross-sectional area (A) containing liquid upto height (H1) has an orifice of cross-sectional area (a) at its bottom. The time required to empty the tank completely will be

A. (2A√H₁)/(Cd × a√2g)

B. (2AH₁)/(Cd × a√2g)

C. (2AH₁3/2)/(Cd × a√2g)

D. (2AH₁²)/(Cd × a√2g)

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4

In open channels, the specific energy is the

A. Total energy per unit discharge

B. Total energy measured with respect to the datum passing through the bottom of the channel

C. Total energy measured above the horizontal datum

D. Kinetic energy plotted above the free surface of water

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4

A channel is said to be of most economical cross-section, if

A. It gives maximum discharge for a given cross-sectional area and bed slope

B. It has minimum wetted perimeter

C. It involves lesser excavation for the designed amount of discharge

D. All of the above

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4

Mercury is often used in barometer because

A. It is the best liquid

B. The height of barometer will be less

C. Its vapour pressure is so low that it may be neglected

D. Both (B) and (C)

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4

When a cylindrical vessel containing liquid is revolved about its vertical axis at a constant angular velocity, the pressure

A. Varies as the square of the radial distance

B. Increases linearly as its radial distance

C. Increases as the square of the radial distance

D. Decreases as the square of the radial distance

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4

A nozzle placed at the end of a water pipe line discharges water at a

A. Low pressure

B. High pressure

C. Low velocity

D. High velocity

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4

The volumetric change of the fluid caused by a resistance is known as

A. Volumetric strain

B. Volumetric index

C. Compressibility

D. Adhesion

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4

The efficiency of power transmission through pipe is (where H = Total supply head, and hf = Head lost due to friction in the pipe)

A. (H - hf )/H

B. H/(H - hf )

C. (H + hf )/H

D. H/(H + hf )

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4

A venturi-flume is used to measure

A. Pressure of liquid

B. Discharge of liquid

C. Pressure difference between two points in a channel

D. Pressure difference between two points in a pipe

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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

In an internal mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to height of the liquid above the vena contracta.

A. Less than

B. More than

C. Equal to

D. None of these

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4

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

A. Atmospheric pressure

B. Gauge pressure

C. Absolute pressure

D. Mean pressure

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4

The coefficient of viscosity may be determined by

A. Capillary tube method

B. Orifice type viscometer

C. Rotating cylinder method

D. All of these

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4

The total energy line lies over the hydraulic gradient line by an amount equal to the

A. Pressure head

B. Velocity head

C. Pressure head + velocity head

D. Pressure head - velocity head

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4

The conditions for the stable equilibrium of a floating body are

A. The metacentre should lie above the center of gravity

B. The center of buoyancy and the center of gravity must lie on the same vertical line

C. A righting couple should be formed

D. All the above are correct

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4

When the coefficient of discharge (Cd) is 0.623, then the general equation for discharge over a rectangular weir is

A. 1.84 (L - 0.1nH)H3/2

B. 1.84 (L - nH)H2

C. 1.84 (L - 0.1nH)H5/2

D. 1.84 (L - nH)H3

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4

In a venturi-flume, the flow takes place at

A. Atmospheric pressure

B. Gauge pressure

C. Absolute pressure

D. None of these

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4

Specific weight of sea water is more that of pure water because it contains

A. Dissolved air

B. Dissolved salt

C. Suspended matter

D. All of the above

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4

A fluid in equilibrium can't sustain

A. Tensile stress

B. Compressive stress

C. Shear stress

D. Bending stress

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4

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

A. Friction loss and flow

B. Length and diameter

C. Flow and length

D. Friction factor and diameter

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4

Uniform flow occurs when

A. The flow is steady

B. The flow is streamline

C. Size and shape of the cross section in a particular length remain constant

D. Size and cross section change uniformly along length

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4

The intensity of pressure on an immersed surface __________ with the increase in depth.

A. Does not change

B. Increases

C. Decreases

D. None of these

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4

The power transmitted through a pipe is (where w = Specific weight in N/m3, and Q = Discharge in m3/s)

A. w × Q × H

B. w × Q × hf

C. w × Q (H - hf)

D. w × Q (H + hf)

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4

If w is the specific weight of liquid and k the depth of any point from the surface, then pressure intensity at that point will be

A. h

B. wh

C. w/h

D. h/w

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4

Surface energy per unit area of a surface is numerically equal to

A. Atmospheric pressure

B. Surface tension

C. Force of adhesion

D. Force of cohesion