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4

According to equation of continuity,

A. w1a1 = w2a2

B. w1v1 = w2v2

C. a1v1 = a2v2

D. a1/v1 = a2/v2

Correct Answer :

C. a1v1 = a2v2


Related Questions

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4

A notch is used to measure __________ of liquids.

A. Pressure

B. Discharge

C. Velocity

D. Volume

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4

The pressure at a point 4 m below the free surface of water is

A. 19.24 kPa

B. 29.24 kPa

C. 39.24 kPa

D. 49.24 kPa

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4

When a vertical wall is subjected to pressures due to liquid on both sides, the resultant pressure is the __________ of the two pressures.

A. Sum

B. Difference

C. Arithmetic mean

D. Geometric mean

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4

The power transmitted through the pipe is maximum when the head lost due to friction is equal to

A. One-fourth of the total supply head

B. One-third of the total supply head

C. One-half of the total supply head

D. Two-third of the total supply head

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4

A fluid which obeys the Newton's law of viscosity is termed as

A. Real fluid

B. Ideal fluid

C. Newtonian fluid

D. Non-Newtonian fluid

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4

The discharge 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

The value of bulk modulus of a fluid is required to determine

A. Reynold's number

B. Froude's number

C. Mach number

D. Euler's number

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4

The discharge through a siphon spillway is

A. Cd × a × √(2gH)

B. Cd × a × √(2g) × H3/2

C. Cd × a × √(2g) × H2

D. Cd × a × √(2g) × H5/2

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4

Mercury does not wet glass. This is due to property of liquid known as

A. Adhesion

B. Cohesion

C. Surface tension

D. Viscosity

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4

Falling drops of water become spheres due to the property of

A. Surface tension of water

B. Compressibility of water

C. Capillarity of water

D. Viscosity of water

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4

The region between the separation streamline and the boundary surface of the solid body is known as

A. Wake

B. Drag

C. Lift

D. Boundary layer

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4

Metacentric height is the distance between the metacentre and

A. Water surface

B. Center of pressure

C. Center of gravity

D. Center of buoyancy

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4

In order to avoid tendency of separation at throat in a Venturimeter, the ratio of the diameter at throat to the diameter of pipe should be

A. 1/16 to 1/8

B. 1/8 to 1/4

C. 1/4 to 1/3

D. 1/3 to 1/2

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4

Newton's law of viscosity is a relationship between

A. Shear stress and the rate of angular distortion

B. Shear stress and viscosity

C. Shear stress, velocity and viscosity

D. Pressure, velocity and viscosity

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4

The Newton's law of resistance is based on the assumption that the

A. Planes of the body are completely smooth

B. Space around the body is completely filled with the fluid

C. Fluid particles do not exert any influence on one another

D. All of the above

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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

The Francis formula for the discharge over Cipoletti weir is

A. 1.84 LH1/2

B. 1.84 LH

C. 1.84 LH3/2

D. 1.84 LH5/2

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4

A piece of metal of specific gravity 13.6 is placed in mercury of specific gravity 13.6, what fraction of it volume is under mercury?

A. The metal piece will simply float over the mercury

B. The metal piece will be immersed in mercury by half

C. Whole of the metal piece will be immersed with its top surface just at mercury level

D. Metal piece will sink to the bottom

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4

The most economical section of a rectangular channel is one which has hydraulic mean depth or hydraulic radius equal to

A. Half the depth

B. Half the breadth

C. Twice the depth

D. Twice the breadth

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4

According to Chezy's formula, the discharge through an open channel is (where A = Area of flow, C = Chezy's constant, m = Hydraulic mean depth, and i = Uniform slope in bed)

A. A × √(m × i)

B. C × √(m × i)

C. AC × √(m × i)

D. mi × √(A × C)

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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

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

The total pressure on the top of a closed cylindrical vessel completely filled up with a liquid is

A. Directly proportional to (radius)2

B. Inversely proportional to (radius)2

C. Directly proportional to (radius)4

D. Inversely proportional to (radius)4

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4

Gauge pressure at a point is equal to the absolute pressure __________ the atmospheric pressure.

A. Plus

B. Minus

C. Divide

D. Multiply

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4

The length of a liquid stream while flowing over a weir __________ at the ends of the sill.

A. Expands

B. Does not change

C. Contracts

D. None of these

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4

The force present in a moving liquid is

A. Inertia force

B. Viscous force

C. Gravity force

D. All of these

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4

Bernoulli equation deals with the law of conservation of

A. Mass

B. Momentum

C. Energy

D. Work

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4

Reynolds number is significant in

A. Supersonics, as with projectile and jet propulsion

B. Full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc.

C. Simultaneous motion through two fluids where there is a surface of discontinuity, gravity forces, and wave making effect, as with ship's hulls

D. All of the above

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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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A fluid whose viscosity does not change with the rate of deformation or shear strain is known as

A. Real fluid

B. Ideal fluid

C. Newtonian fluid

D. Non-Newtonian fluid