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-10 section-3

If the flow of air through the compressor is perpendicular to its axis, then it is a

A) Reciprocating compressor B) Centrifugal compressor C) Axial flow compressor D) Turbo compressor

Discuss

Answer & Solution

Answer: Option B

Solution:

If the flow of air through the compressor is perpendicular to its axis, then it is a Centrifugal compressor

A rocket works with maximum overall efficiency when air craft velocity is equal to the

A) Jet velocity B) Twice the jet velocity C) Half the jet velocity D) Average of the jet velocity

Discuss

Answer & Solution

Answer: Option C

Solution:

A rocket works with maximum overall efficiency when air craft velocity is equal to the half the jet velocity

The volumetric efficiency of a compressor

A) Increases with decrease in compression ratio B) Decreases with decrease in compression ratio C) Increases with increase in compression ratio D) Decreases with increase in compression ratio

Discuss

Answer & Solution

Answer: Option D

Solution:

The volumetric efficiency represents the efficiency of a compressor cylinder to compress gas. It may be defined as the ratio of the volume of gas actually delivered to the piston displacement, corrected to suction temperature and pressure. The volumetric efficiency of a compressor Decreases with increase in compression ratio

The ratio of specific weight/h.p. of gas turbine and I.C. engines may be typically of the order of

A) 1 : 1 B) 2 : 1 C) 4 : 1 D) 1 : 6

Discuss

Answer & Solution

Answer: Option D

Solution:

The ratio of specific weight/h.p. of gas turbine and I.C. engines may be typically of the order of 1 : 6.

A closed cycle gas turbine gives ________ efficiency as compared to an open cycle gas turbine.

A) Same B) Lower C) Higher D) None of these

Discuss

Answer & Solution

Answer: Option C

Solution:

A closed cycle gas turbine gives higher efficiency as compared to an open cycle gas turbine.

Aeroplanes employ following type of compressor

A) Radial flow B) Axial flow C) Centrifugal D) None of the above

Discuss

Answer & Solution

Answer: Option B

Solution:

Aeroplanes employ axial flow type of compressor