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4

If the coefficient of discharge is 0.6, then the discharge over a right angled notch is

A. 0.417 H5/2

B. 1.417 H5/2

C. 4.171 H5/2

D. 7.141 H5/2

Correct Answer :

B. 1.417 H5/2


Related Questions

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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

A moving fluid mass may be brought to a static equilibrium position, by applying an imaginary inertia force of the same magnitude as that of the accelerating force but in the opposite direction. This statement is called

A. Pascal's law

B. Archimedess principle

C. D-Alembert's principle

D. None of these

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4

A flow through a long pipe 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 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

The velocity corresponding to Reynold number of 2800, is called

A. Sub-sonic velocity

B. Super-sonic velocity

C. Lower critical velocity

D. Higher critical velocity

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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

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

Viscosity of water in comparison to mercury is

A. Higher

B. Lower

C. Same

D. Higher/lower depending on temperature

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4

The loss of pressure head in case of laminar flow is proportional to

A. Velocity

B. (Velocity)2

C. (Velocity)3

D. (Velocity)4

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4

The velocity of the liquid flowing through the divergent portion of a Venturimeter

A. Remains constant

B. Increases

C. Decreases

D. Depends upon mass of liquid

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4

Falling drops of water become spheres due to the property of

A. Adhesion

B. Cohesion

C. Surface tension

D. Viscosity

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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

In a short cylindrical external mouthpiece, the vena contracta occurs at a distance __________ the diameter of the orifice from the outlet of orifice.

A. Equal to

B. One-fourth

C. One-third

D. One-half

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4

The resultant upward pressure of the fluid on an immersed body is called

A. Up-thrust

B. Buoyancy

C. Center of pressure

D. All the above are correct

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4

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

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4

When a body is placed over a liquid, it will sink down if

A. Gravitational force is equal to the up-thrust of the liquid

B. Gravitational force is less than the up-thrust of the liquid

C. Gravitational force is more than the up-thrust of the liquid

D. None of the above

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4

In a lock-gate, the reaction between two gates is (where P = Resultant pressure on the lock gate, and α = Inclination of the gate with the normal to the side of the lock)

A. p/sinα

B. 2p/sinα

C. p/2sinα

D. 2p/sin (α/2)

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4

If the depth of water in an open channel is greater than the critical depth, the flow is called

A. Critical flow

B. Turbulent flow

C. Tranquil flow

D. Torrential flow

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4

General energy equation holds for

A. Steady flow

B. Turbulent flow

C. Laminar flow

D. Non-uniform flow

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4

Choose the wrong statement

A. Any weight, floating or immersed in a liquid, is acted upon by a buoyant force

B. Buoyant force is equal to the weight of the liquid displaced

C. The point through which buoyant force acts, is called the center of buoyancy

D. Center of buoyancy is located above the center of gravity of the displaced liquid

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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

Which of the following is dimensionless?

A. Specific weight

B. Specific volume

C. Specific speed

D. Specific gravity

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4

The torque required to overcome viscous resistance of a collar bearing is (where R1 andR2 = External and internal radius of collar)

A. (μπ²N/60t) × (R₁ - R₂)

B. (μπ²N/60t) × (R₁² - R₂²)

C. (μπ²N/60t) × (R₁³ - R₂³)

D. (μπ²N/60t) × (R₁⁴ - R₂⁴)

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4

The upper surface of a weir over which water flows is known is

A. Crest

B. Nappy

C. Sill

D. Weir top

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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 liquid used in manometers should have

A. Low density

B. High density

C. Low surface tension

D. High surface tension

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4

The flow in which conditions do not change with time at any point, is known as

A. One dimensional flow

B. Uniform flow

C. Steady flow

D. Turbulent flow

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4

Coefficient of resistance is the ratio of

A. Actual velocity of jet at vena-contracta to the theoretical velocity

B. Area of jet at vena-contracta to the area of orifice

C. Loss of head in the orifice to the head of water available at the exit of the orifice

D. Actual discharge through an orifice to the theoretical discharge

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4

In a forced vortex, the velocity of flow everywhere within the fluid is

A. Maximum

B. Minimum

C. Zero

D. Nonzero finite

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For hypersonic flow, the Mach number is

A. Unity

B. Greater than unity

C. Greater than 2

D. Greater than 4