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What is the correct answer?

4

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

A. N-m/s

B. N-s/m2

C. m2/s

D. N-m

Correct Answer :

C. m2/s


Related Questions

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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 mass of 2.5 m3 of a certain liquid is 2 tonnes. Its mass density is

A. 200 kg/m3

B. 400 kg/m3

C. 600 kg/m3

D. 800 kg/m3

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4

A manometer is used to measure

A. Low pressure

B. Moderate pressure

C. High pressure

D. Atmospheric pressure

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4

The length AB of a pipe ABC in which the liquid is flowing has diameter (d1) and is suddenly contracted to diameter (d2) at B which is constant for the length BC. The loss of head due to sudden contraction, assuming coefficient of contraction as 0.62, is

A. v₁²/2g

B. v₂²/2g

C. 0.5 v₁²/2g

D. 0.375 v₂²/2g

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4

The continuity equation is connected with

A. Open channel/pipe flow

B. Compressibility of fluids

C. Conservation of mass

D. Steady/unsteady flow

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4

Ratio of inertia force to surface Jension is known as

A. Mach number

B. Froude number

C. Reynoldss number

D. Weber's number

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4

Bernoulli's equation is applied to

A. Venturimeter

B. Orifice meter

C. Pitot tube

D. All of these

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4

The capillary rise at 20°C in a clean glass tube of 1 mm bore containing water is approximately

A. 5 mm

B. 10 mm

C. 20 mm

D. 30 mm

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4

The property by virtue of which a liquid opposes relative motion between its different layers is called

A. Surface tension

B. Coefficient of viscosity

C. Viscosity

D. Osmosis

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4

For a perfect incompressible liquid, flowing in a continuous stream, the total energy of a particle remains the same, while the particle moves from one point to another. This statement is called

A. Continuity equation

B. Bernoulli's equation

C. Pascal's law

D. Archimedess principle

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4

In an external mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to 0.89 times the 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

Hot wire anemometer is used to measure

A. Pressure in gases

B. Liquid discharge

C. Pressure in liquids

D. Gas velocities

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4

The specific weight of water in S.I. units is taken as

A. 9.81 kN/m3

B. 9.81 × 103 N/m3

C. 9.81 × 10-6 N/mm3

D. Any one of these

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4

Alcohol is used in manometers because

A. It has low vapour pressure

B. It is clearly visible

C. It has low surface tension

D. It can provide longer column due to low density

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4

If a body floating in a liquid occupies a new position and remains at rest in this new position, when given a small angular displacement, the body is said to be in __________ equilibrium.

A. Neutral

B. Stable

C. Unstable

D. None of these

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4

The loss of head at exit of a pipe is (where v = Velocity of liquid in the pipe)

A. v²/2g

B. 0.5v²/2g

C. 0.375v²/2g

D. 0.75v²/2g

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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

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

Principle of similitude forms the basis of

A. Comparing two identical equipments

B. Designing models so that the result can be converted to prototypes

C. Comparing similarity between design and actual equipment

D. Hydraulic designs

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4

Dynamic viscosity of most of the gases with rise in temperature

A. Increases

B. Decreases

C. Remain unaffected

D. Unpredictable

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4

The value of coefficient of discharge is __________ the value of coefficient of velocity.

A. Less than

B. Same as

C. More than

D. None of these

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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

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

Uniform 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 pleasure

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4

A flow in which the volume of a fluid and its density does not change during the flow is called _________ flow.

A. Incompressible

B. Compressible

C. Viscous

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 flow is called sub-sonic, if the Mach number is

A. Less than unity

B. Unity

C. Between 1 and 6

D. More than 6

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4

The weight per unit volume of a liquid at a standard temperature and pressure is called

A. Specific weight

B. Mass density

C. Specific gravity

D. None of these

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4

When a tank containing liquid moves with an acceleration in the horizontal direction, then the free surface of the liquid

A. Remains horizontal

B. Becomes curved

C. Falls on the front end

D. Falls on the back end

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4

When a body is placed over a liquid, it will float 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