Compressors, Gas Turbines And Jet Engines MCQ Questions & Answers

Compressors, Gas Turbines And Jet Engines MCQ Questions & Answers | Mechanical Engineering

Learn Compressors, Gas Turbines And Jet Engines MCQ questions & answers are available for a Mechanical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Compressors, Gas Turbines And Jet Engines MCQ question is the important chapter for a Mechanical Engineering and GATE students. Page-8 section-3

Stalling of blades in axial flow compressor is the phenomenon of

A) Air stream blocking the passage B) Motion of air at sonic velocity C) Unsteady periodic and reversed flow D) Air stream not able to follow the blade contour

Discuss

Answer & Solution

Answer: Option D

Solution:

Stalling of blades in axial flow compressor is the phenomenon of Air stream not able to follow the blade contour

A rocket engine uses __________ for the combustion of its fuel.

A) Surrounding air B) Compressed atmospheric air C) Its own oxygen D) None of these

Discuss

Answer & Solution

Answer: Option C

Solution:

A rocket engine uses its own oxygen for the combustion of its fuel.

Separators in compressor installations are located

A) Before inter-cooler B) After inter-cooler C) After receiver D) Between after-cooler and air receiver

Discuss

Answer & Solution

Answer: Option D

Solution:

Separators in compressor installations are located Between after-cooler and air receiver

Mechanical efficiency of gas turbines as compared to I.C. engines is

A) Higher B) Lower C) Same D) None of the above

Discuss

Answer & Solution

Answer: Option A

Solution:

Mechanical efficiency of gas turbines as compared to I.C. engines is higher.

The maximum combustion pressure in gas turbine as compared to I.C. engine is

A) More B) Less C) Same D) Depends on other factors

Discuss

Answer & Solution

Answer: Option B

Solution:

The maximum combustion pressure in gas turbine as compared to I.C. engine is less

Which of the following fuels can be used in turbojet engines?

A) Liquid hydrogen B) High speed diesel oil C) Kerosene D) Methyl alcohol

Discuss

Answer & Solution

Answer: Option C

Solution:

Kerosene is used in turbojet engines

Ram compression in turbojet involves

A) Reduction of speed of incoming air and conversion of part of it into pressure energy B) Compression of inlet air C) Increasing speed of incoming air D) Lost work

Discuss

Answer & Solution

Answer: Option A

Solution:

Ram compression in turbojet involve Reduction of speed of incoming air and conversion of part of it into pressure energy

Standard air is the air at ________ and relative humidity of 36 percent.

A) 0.1 bar and 20°C B) 1 bar and 20°C C) 0.1 bar and 40°C D) 1 bar and 40°C

Discuss

Answer & Solution

Answer: Option B

Solution:

Standard air is the air at 1 bar and 20°C and relative humidity of 36 percent.

Which of the following statement is correct as regard to centrifugal compressors?

A) The flow of air is parallel to the axis of the compressor B) The static pressure of air in the impeller increases in order to provide centripetal force on the air C) The impeller rotates at high speeds D) The maximum efficiency is higher than multistage axial flow compressors

Discuss

Answer & Solution

Answer: Option B

Solution:

In centrifugal compressor The static pressure of air in the impeller increases in order to provide centripetal force on the air

To avoid moisture troubles, the branch connections from compressed air lines should be taken from

A) Top side of main B) Bottom side of main C) Left side of main D) Right side of main

Discuss

Answer & Solution

Answer: Option A

Solution:

To avoid moisture troubles, the branch connections from compressed air lines should be taken from Top side of main