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4

Euler's number is the ratio of __________ force to pressure force.

A. Inertia

B. Gravity

C. Viscous

D. None of these

Correct Answer :

A. Inertia


Related Questions

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4

The total energy line lies over the centre line of the pipe by an amount equal to

A. Pressure head

B. Velocity head

C. Pressure head + velocity head

D. Pressure head - velocity head

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4

The flow in a pipe is turbulent when Reynold number is

A. Less than 2000

B. Between 2000 and 2800

C. More than 2800

D. None of these

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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

The pressure 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

A glass tube of small diameter (d) is dipped in fluid. The height of rise or fall in the tube given by (where w = Specific weight of liquid, α = Angle of contact of the liquid surface, and σ = Surface tension)

A. 4wd/σ cosα

B. σ cosα/4wd

C. 4σ cosα/wd

D. wd/4σ cosα

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4

A balloon lifting in air follows the following principle

A. Law of gravitation

B. Archimedes principle

C. Principle of buoyancy

D. All of the above

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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 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

Choose the correct relationship

A. Specific gravity = gravity × density

B. Dynamic viscosity = kinematic viscosity × density

C. Gravity = specific gravity × density

D. Kinematic viscosity = dynamic viscosity × density

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4

The intensity of pressure on an immersed surface __________ with the increase in depth.

A. Does not change

B. Increases

C. Decreases

D. None of these

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4

A pitot tube is used to measure the

A. Velocity of flow at the required point in a pipe

B. Pressure difference between two points in a pipe

C. Total pressure of liquid flowing in a pipe

D. Discharge through a pipe

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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

Which of the following statement is correct?

A. In a compressible flow, the volume of the flowing liquid changes during the flow

B. A flow, in which the volume of the flowing liquid does not change, is called incompressible flow

C. When the particles rotate about their own axes while flowing, the flow is said to be rotational flow

D. All of the above

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4

A flow is called super-sonic if the

A. Velocity of flow is very high

B. Discharge is difficult to measure

C. Mach number is between 1 and 6

D. None of these

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4

The pressure in the air space above an oil (sp. gr. 0.8) surface in a tank is 0.1 kg/cm. The pressure at 2.5 m below the oil surface will be

A. 2 metres of water column

B. 3 metres of water column

C. 3.5 metres of water column

D. 4 m of water column

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4

The total head of a liquid particle in motion is equal to

A. Pressure head + kinetic head + potential head

B. Pressure head - (kinetic head + potential head)

C. Potential head - (pressure head + kinetic head)

D. Kinetic head - (pressure head + potential head)

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4

The pressure measured with the help of a pressure gauge is called

A. Atmospheric pressure

B. Gauge pressure

C. Absolute pressure

D. Mean pressure

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4

In a footstep bearing, if the speed of the shaft is doubled, then the torque required to overcome the viscous resistance will be

A. Double

B. Four times

C. Eight times

D. Sixteen times

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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

The variation in the volume of a liquid with the variation of pressure is called its

A. Surface tension

B. Compressibility

C. Capillarity

D. Viscosity

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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

In order to measure the flow with a Venturimeter, it is installed in

A. Horizontal line

B. Inclined line with flow upwards

C. Inclined line with flow downwards

D. Any direction and in any location

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4

The unit of surface tension is

A. N/m

B. N/m2

C. N/m3

D. N-m

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4

Two dimensional flows 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

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

In case of flow through parallel pipes,

A. The head loss for all the pipes is same

B. The total discharge is equal to the sum of discharges in the various pipes

C. The total head loss is the sum of head losses in the various pipes

D. Both (A) and (B)

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4

The rise of liquid along the walls of a revolving cylinder about the initial level is __________ the depression of the liquid at the axis of rotation.

A. Same as

B. Less than

C. More than

D. None of these

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4

Flow of water in a pipe about 3 metres in diameter can be measured by

A. Orifice plate

B. Venturimeter

C. Rotameter

D. Pitot tube

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4

The viscosity of water at 20°C is

A. One stoke

B. One centistoke

C. One poise

D. One centipoise

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4

In a venturi-flume, the flow takes place at

A. Atmospheric pressure

B. Gauge pressure

C. Absolute pressure

D. None of these