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-2

In a high pressure compressor, the delivery pressure is

A) 1 to 5 bar B) 5 to 8 bar C) 8 to 10 bar D) 10 to 15 bar

Discuss

Answer & Solution

Answer: Option C

Solution:

In a high pressure compressor, the delivery pressure is 8 to 10 bar

The capacity of compressor will be highest when its intake temperature is

A) Lowest B) Highest C) Anything D) Atmospheric

Discuss

Answer & Solution

Answer: Option D

Solution:

The capacity of compressor will be highest when its intake temperature is atmospheric

It is not possible to use closed gas turbine cycle in aeronautical engines because

A) It is inefficient B) It is bulky C) It requires cooling water for its operation D) None of the above

Discuss

Answer & Solution

Answer: Option C

Solution:

It is not possible to use closed gas turbine cycle in aeronautical engines because It requires cooling water for its operation

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 semi rotary type C) Disc or feather type D) Any of the above

Discuss

Answer & Solution

Answer: Option C

Solution:

For slow speed large capacity compressor, following type of valve will be best suited Disc or feather type

In a centrifugal compressor, the ratio of the ________ to the blade velocity is called slip factor.

A) Inlet whirl velocity B) Outlet whirl velocity C) Inlet velocity of flow D) Outlet velocity of flow

Discuss

Answer & Solution

Answer: Option D

Solution:

In a centrifugal compressor, the ratio of the Outlet velocity of flow to the blade velocity is called slip factor.

An ideal air compressor cycle without clearance on P-V diagram can be represented by following processes

A) One adiabatic, two isobaric, and one constant volume B) Two adiabatic and two isobaric C) Two adiabatic, one isobaric and one constant volume D) One adiabatic, one isobaric and two constant volumes

Discuss

Answer & Solution

Answer: Option A

Solution:

An ideal air compressor cycle without clearance on P-V diagram can be represented by following processes One adiabatic, two isobaric, and one constant volume

An ideal air compressor cycle with clearance on P-V diagram can be represented by following processes

Discuss

Answer & Solution

Answer: Option B

Solution:

An ideal air compressor cycle with clearance on P-V diagram can be represented by following processes Two adiabatic and two isobaric

A compressor at high altitude will draw

A) More power B) Less power C) Same power D) More/less power depending on other factors

Discuss

Answer & Solution

Answer: Option B

Solution:

A compressor at high altitude will draw less power

In which case the air-fuel ratio is likely to be maximum?

A) Gas turbine B) 4-stroke petrol engine C) 4-stroke diesel engine D) Multi cylinder engine

Discuss

Answer & Solution

Answer: Option A

Solution:

In Gas turbine case the air-fuel ratio is likely to be maximum

With the decrease in compression ratio, the volumetric efficiency

A) Does not change B) Increases C) Decreases D) First decrease and then increase

Discuss

Answer & Solution

Answer: Option B

Solution:

With the decrease in compression ratio, the volumetric efficiency increases