Compressors, Gas Turbines And Jet Engines MCQ Questions & Answers

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-9 section-3

Each section contains 100 MCQs on Compressors, Gas Turbines and Jet Engines .

As the turbine inlet temperature increases, the thermal efficiency of gas turbine for the optimum pressure ratio

A) Increases B) Decreases C) Remain same D) First increases and then decreases

Discuss

Answer & Solution

Answer: Option A

Solution:

As the turbine inlet temperature increases, the thermal efficiency of gas turbine for the optimum pressure ratio Increases

If infinite number of heaters be used in a gas turbine, then expansion process in turbine approaches

A) Isothermal B) Isentropic C) Adiabatic D) Isochoric

Discuss

Answer & Solution

Answer: Option A

Solution:

If infinite number of heaters be used in a gas turbine, then expansion process in turbine approaches Isothermal

Inter-cooling in gas turbine results in

A) Increase in net output but decrease in thermal efficiency B) Increase in thermal efficiency but decrease in net output C) Increase in both thermal efficiency and net output D) Decrease in both thermal efficiency and net output

Discuss

Answer & Solution

Answer: Option A

Solution:

Inter-cooling in gas turbine results in Increase in net output but decrease in thermal efficiency

Reheating in gas turbine results in

A) Increase of work ratio B) Decrease of thermal efficiency C) Decrease of work ratio D) Both (A) and (B) above

Discuss

Answer & Solution

Answer: Option D

Solution:

Reheating in gas turbine results in - Increase of work ratio -Decrease of thermal efficiency

Reheating in multistage expansion gas turbine results in

A) High thermal efficiency B) Reduction in compressor work C) Decrease of heat loss in exhaust D) Maximum work output

Discuss

Answer & Solution

Answer: Option D

Solution:

Reheating in multistage expansion gas turbine results in Maximum work output

In turbo fan engine, the jet velocity as compared to turbojet engine is

A) Less B) More C) Same D) May be less or more depending upon speed

Discuss

Answer & Solution

Answer: Option A

Solution:

In turbo fan engine, the jet velocity as compared to turbojet engine is less

Which is false statement about air receivers?

A) These are used to dampen pulsations B) These act as reservoir to take care of sudden demands C) These increase compressor efficiency D) These knock out some oil and moisture

Discuss

Answer & Solution

Answer: Option C

Solution:

Important points regarding to air receivers -These are used to dampen pulsations - These act as reservoir to take care of sudden demands -These knock out some oil and moisture

For speed above 3000 km/hour, it is more advantageous to use

A) Turbojet engine B) Ramjet engine C) Propellers D) Rockets

Discuss

Answer & Solution

Answer: Option B

Solution:

For speed above 3000 km/hour, it is more advantageous to use ramjet engine

When air is to be compressed at a high pressure, then it is advantageous to use

A) Single stage compression B) Multistage compression without intercooling C) Multistage compression with intercooling D) None of these

Discuss

Answer & Solution

Answer: Option C

Solution:

When air is to be compressed at a high pressure, then it is advantageous to use Multistage compression with intercooling

Mining industry usually employs following motive power

A) A.C. electric motor B) Compressed air C) Petrol engine D) Diesel engine

Discuss

Answer & Solution

Answer: Option B

Solution:

Mining industry usually employs following motive power compressed air

1 2 3 4 5 6 7 8 9 10

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