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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

Correct Answer :

B. 1/Sinθ


Related Questions

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4

The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as

A. Meta center

B. Center of pressure

C. Center of buoyancy

D. Center of gravity

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4

Reynold's number is the ratio of inertia force to

A. Pressure force

B. Elastic force

C. Gravity force

D. Viscous force

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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

When a cylindrical vessel, containing some liquid, is rotated about its vertical axis, the liquid surface is depressed down at the axis of its rotation and rises up near the walls of the vessel on all sides. This type of flow is known as

A. Steady flow

B. Turbulent flow

C. Vortex flow

D. Uniform flow

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4

The pressure less than atmospheric pressure is known as

A. Suction pressure

B. Vacuum pressure

C. Negative gauge pressure

D. All of these

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4

An odd shaped body weighing 7.5 kg and occupying 0.01 m3 volume will be completely submerged in a fluid having specific gravity of

A. 1

B. 1.2

C. 0.8

D. 0.75

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4

In order that flow takes place between two points in a pipeline, the differential pressure between these points must be more than

A. Frictional force

B. Viscosity

C. Surface friction

D. All of the above

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4

An open tank containing liquid is made to move from rest with a uniform acceleration. The angle 0 which the free surface of liquid makes with the horizontal is such that (where a = Horizontal acceleration of the tank, and g = Acceleration due to gravity)

A. tanθ = a/g

B. tanθ = 2 a/g

C. tanθ = a/2g

D. tanθ = a2/2g

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4

A flow is called hyper-sonic, if the Mach number is

A. Less than unity

B. Unity

C. Between 1 and 6

D. None of these

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4

The discharge through a channel of rectangular section will be maximum, if

A. Its depth is twice the breadth

B. Its breadth is twice the depth

C. Its depth is thrice the breadth

D. Its breadth is thrice the depth

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4

When a liquid is flowing through a pipe, the velocity of the liquid is

A. Maximum at the centre and minimum near the walls

B. Minimum at the centre and maximum near the walls

C. Zero at the centre and maximum near the walls

D. Maximum at the centre and zero near the walls

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4

The theoretical velocity of jet at vena contracta is (where H = Head of water at vena contracta)

A. 2gH

B. H × √(2g)

C. 2g × √H

D. √(2gh)

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4

The equation of continuity holds good when the flow

A. Is steady

B. Is one dimensional

C. Velocity is uniform at all the cross sections

D. All of the above

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4

Bulk modulus of a fluid __________ as the pressure increases.

A. Remain same

B. Decreases

C. Increases

D. None of these

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4

A flow through a long pipe at decreasing rate is called __________ uniform flow.

A. Steady

B. Unsteady

C. Both A and B

D. None of these

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4

The speed of sound in a ideal gas varies directly as its

A. Absolute temperature

B. Temperature

C. Density

D. Modulus of elasticity

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4

According to Newton's law of viscosity, the shear stress on a layer of a fluid is __________ to the rate of shear strain.

A. Equal to

B. Directly proportional

C. Inversely proportional

D. None of these

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4

The centre of pressure acts __________ the centre of gravity of immersed surface.

A. At

B. Above

C. Below

D. None 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

When a cylindrical vessel containing liquid is resolved, the surface of the liquid takes the shape of

A. A triangle

B. A paraboloid

C. An ellipse

D. None of these

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4

The pressure of fluid due to hammer blow is

A. Directly proportional to density of fluid

B. Inversely proportional to density of fluid

C. Directly proportional to (density)1/2 of fluid

D. Inversely proportional to (density)1/2 of fluid

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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

The discharge over a rectangular notch is

A. Inversely proportional to H3/2

B. Directly proportional to H3/2

C. Inversely proportional to H5/2

D. Directly proportional to H5/2

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4

A piece of wood having weight 5 kg floats in water with 60% of its volume under the liquid. The specific gravity of wood is

A. 0.83

B. 0.6

C. 0.4

D. 0.3

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4

The process of diffusion of one liquid into the other through a semi permeable membrane is called

A. Viscosity

B. Osmosis

C. Surface tension

D. Cohesion

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4

The viscosity of a liquid __________ its rate of flow through a hole in a vessel.

A. Effects

B. Does not effect

C. Both A and B

D. None of these

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4

For similarity, in addition to models being geometrically similar to prototype, the following in both cases should also be equal

A. Ratio of inertial force to force due to viscosity

B. Ratio of inertial force to force due to gravitation

C. Ratio of inertial force to force due to surface tension

D. All the four ratios of inertial force to force due to viscosity, gravitation, surface tension, and elasticity

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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

What is the correct answer?

4

When a body is immersed wholly or partially in a liquid, it is lifted up by a force equal to the weight of liquid displaced by the body. This statement is called

A. Pascal's law

B. Archimedess principle

C. Principle of floatation

D. Bernoulli's theorem

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4

The flow in a pipe is neither laminar nor turbulent when Reynold number is

A. Less than 2000

B. Between 2000 and 2800

C. More than 2800

D. None of these