Compressors | Gas Turbines and Jet Engines

Diffuser in a compressor is used to _____________________?

Byadmin January 23, 2019August 15, 2021

Diffuser in a compressor is used to _____________________?

A. increase velocity
B. make the flow stream-line
C. convert pressure energy into kinetic energy
D. convert kinetic energy into pressure energy
E. increase degree of reaction

Compressors | Gas Turbines and Jet Engines

For slow-speed large capacity compressor, following type of valve will be best suited________________?

For slow-speed large capacity compressor, following type of valve will be best suited________________?

A. poppet valve
B. mechanical valve of the corliss, sleeve, rotary or semirotary type
C. disc or feather type
D. any of the above
E. none of the above

Read More For slow-speed large capacity compressor, following type of valve will be best suited________________?
Compressors | Gas Turbines and Jet Engines

If V, U and Vr represent the absolute velocity of fluid, velocity of blade, and relative velocity of fluid, and suffix i and o stand for entry and exit conditions, then in a rotary machine whose degree of reaction is unity______________?

If V, U and Vr represent the absolute velocity of fluid, velocity of blade, and relative velocity of fluid, and suffix i and o stand for entry and exit conditions, then in a rotary machine whose degree of reaction is unity______________?

A. Vi=V0B
B. Vt>V0
C. U,<V0
D. V,= U0
E. Vri=Vm

Read More If V, U and Vr represent the absolute velocity of fluid, velocity of blade, and relative velocity of fluid, and suffix i and o stand for entry and exit conditions, then in a rotary machine whose degree of reaction is unity______________?
Compressors | Gas Dynamics and Gas Turbines | Mechanical Engineering

In reciprocating air compressors, isothermal efficiency is used for all sorts of calculations.

Question: In reciprocating air compressors, isothermal efficiency is used for all sorts of calculations.
[A].

Correct
[B].
Incorrect

Answer: Option A

Explanation:

No answer description available for this question.

Read More In reciprocating air compressors, isothermal efficiency is used for all sorts of calculations.
Compressors | Gas Turbines and Jet Engines

The volumetirc efficiency of a compressor is calculated on the basis of __________________?

The volumetirc efficiency of a compressor is calculated on the basis of __________________?

A. volume of air inhaled at working conditions
B. volume of air inhaled at N.T.P. conditions
C. volume at 0°C and 1 kg/cm2
D. volume at 20°C and 1 kg/cm2
E. none of the above

Read More The volumetirc efficiency of a compressor is calculated on the basis of __________________?
Compressors | Gas Turbines and Jet Engines

Losses in a centrifugal compressor are due to__________________?

Losses in a centrifugal compressor are due to__________________?

A. inlet losses
B. impeller channel losses
C. diffuser losses
D. all of the above
E. none of the above

Read More Losses in a centrifugal compressor are due to__________________?
Compressors | Gas Turbines and Jet Engines

The ratio of outlet whirl velocity to blade velocity in case of centrifugal compressor is called__________________?

The ratio of outlet whirl velocity to blade velocity in case of centrifugal compressor is called__________________?

A. slip factor
B. velocity factor
C. velocity coefficient
D. blade effectiveness

Read More The ratio of outlet whirl velocity to blade velocity in case of centrifugal compressor is called__________________?

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