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4

The total pressure on the surface of a vertical sluice gate 2 m x 1 m with its top 2 m surface being 0.5 m below the water level will be

A. 500 kg

B. 1000 kg

C. 1500 kg

D. 2000 kg

Correct Answer :

D. 2000 kg


Related Questions

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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

Barometer is used to measure

A. Velocity of liquid

B. Atmospheric pressure

C. Pressure in pipes and channels

D. Difference of pressure between two points in a pipe

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4

Which of the following instrument can be used for measuring speed of a submarine moving in deep sea?

A. Venturimeter

B. Orifice plate

C. Hot wire anemometer

D. Pitot tube

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4

Free surface of a liquid tends to contract to the smallest possible area due to force of

A. Surface tension

B. Viscosity

C. Friction

D. Cohesion

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4

A fluid having no viscosity is known as

A. Real fluid

B. Ideal fluid

C. Newtonian fluid

D. Non-Newtonian fluid

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4

Poise is the unit of

A. Surface tension

B. Capillarity

C. Viscosity

D. Shear stress in fluids

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4

Choose the wrong statement

A. Fluids are capable of flowing

B. Fluids conform to the shape of the containing vessels

C. When in equilibrium, fluids cannot sustain tangential forces

D. When in equilibrium, fluids can sustain shear forces

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4

According to Bazin's formula, the discharge over a rectangular weir is mL2g x H3/2where m is equal to

A. 0.405 + (0.003/H)

B. 0.003 + (0.405/H)

C. 0.405 + (H/0.003)

D. 0.003 + (H/0.405)

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4

Capillary action is due to the

A. Surface tension

B. Cohesion of the liquid

C. Adhesion of the liquid molecules and the molecules on the surface of a solid

D. All of the above

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4

When the Mach number is less than unity, the flow is called

A. Sub-sonic flow

B. Sonic flow

C. Super-sonic flow

D. Hyper-sonic flow

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4

The celerity (velocity) of a pressure wave in a fluid is given by (where K = Bulk modulus, and ρ = Density of the fluid)

A. K.ρ

B. K/ρ

C. ρ/K

D. None of these

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4

The factional resistance of a pipe varies approximately with __________ of the liquid.

A. Pressure

B. Velocity

C. Square of velocity

D. Cube of velocity

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4

A piece weighing 3 kg in air was found to weigh 2.5 kg when submerged in water. Its specific gravity is

A. 1

B. 5

C. 7

D. 6

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4

If 850 kg liquid occupies volume of one cubic meter, men 0.85 represents its

A. Specific weight

B. Specific mass

C. Specific gravity

D. Specific density

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4

True one-dimensional 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. The magnitude and direction of the velocity do not change from point to point in the fluid

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

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4

A nozzle is generally made of

A. Cylindrical shape

B. Convergent shape

C. Divergent shape

D. Convergent-divergent shape

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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 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 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

In order to increase sensitivity of U-tube manometer, one leg is usually inclined by angle θ. Sensitivity of inclined tube to sensitivity of Utube is equal to

A. Sinθ

B. 1/Sinθ

C. Cosθ

D. 1/Cosθ

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4

The center of pressure of a surface subjected to fluid pressure is the point

A. On the surface at which resultant pressure acts

B. On the surface at which gravitational force acts

C. At which all hydraulic forces meet

D. Similar to metacentre

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4

The velocity at which the flow changes from laminar flow to turbulent flow is called

A. Critical velocity

B. Velocity of approach

C. Sub-sonic velocity

D. Super-sonic velocity

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4

A vertical wall is subjected to a pressure due to one kind of liquid, on one of its sides. Which of the following statement is correct?

A. The pressure on the wall at the liquid level is minimum

B. The pressure on the bottom of the wall is maximum

C. The pressure on the wall at the liquid level is zero, and on the bottom of the wall is maximum

D. The pressure on the bottom of the wall is zer

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4

The hammer blow in pipes occurs when

A. There is excessive leakage in the pipe

B. The pipe bursts under high pressure of fluid

C. The flow of fluid through the pipe is suddenly brought to rest by closing of the valve

D. The flow of fluid through the pipe is gradually brought to rest by closing of the valve

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4

With an increase in size of tube, the rise or depression of liquid in the tube due to surface tension will

A. Decrease

B. Increase

C. Remain unchanged

D. Depend upon the characteristics of liquid

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4

The volume of a fluid __________ as the pressure increases.

A. Remains same

B. Decreases

C. Increases

D. None of these

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4

The shear stress-strain graph for a Newtonian fluid is a

A. Straight line

B. Parabolic curve

C. Hyperbolic curve

D. Elliptical

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4

The specific gravity of an oil whose specific weight is 7.85 kN/m3, is

A. 0.8

B. 1

C. 1.2

D. 1.6

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

A. Metacentre

B. Center of pressure

C. Center of buoyancy

D. Center of gravity