Location of vena-contracta in an orificemeter does not depend upon the

The discharge co-efficient for an orificemeter does not depend upon the

A

Pipe length

B

Ratio of pipe diameter to orifice diameter

C

Type of orifice & the Reynolds number

D

Pipe diameter

The co-efficient of discharge of an orificemeter is a function of

A

Reynolds number at the orifice

B

Ratio of orifice dia to pipe dia

C

Both A and B

D

None of the above parameters, and has a constant value of 0.61

Vena-contracta pressure tapping is at a distance __________ from the position of an orificemeter fitted in a pipe of internal diameter 'd'

A

d

B

0.5d

C

2d

D

4d

Power loss in an orificemeter is __________ that in a venturimeter.

A

Less than

B

Same as

C

More than

D

Data insufficient, cannot be predicted

The most serious disadvantage of an orificemeter is that

A

It is not very accurate

B

It is very costly

C

Most of the pressure drop is not recoverable

D

It is not suitable for measuring gas flow

Vena-contracta formed during flow of a liquid through an orificemeter has

A

Minimum liquid cross-section

B

More diameter compared to orifice diameter

C

Minimum velocity of fluid stream

D

None of these

Venturimeter and orificemeter measures the __________ of the fluid.

A

Pressure

B

Maximum velocity

C

Average velocity

D

Point velocity

With increase in the ratio of orifice diameter to pipe diameter in case of an orificemeter, the overall pressure loss

A

Decreases

B

Increases

C

Remains constant

D

Increases linearly

If there are no externally induced flow velocities, then the Nusselt Number (Nu) does not depend upon

A

Prandtl number

B

Reynolds number

C

Grashof Number

D

none of the

When a magnet is in motion relative to a coil the induced e.m.f. does not depend upon

A

Resistance of the coil

B

Motion of the magnet

C

Number of turns of the coil

D

Pole strength of the magnet

Location of vena-contracta in an orificemeter does not depend upon the

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