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-1

The compressed air may be used

A) In gas turbine plants B) For operating pneumatic drills C) In starting and supercharging of I.C. engines D) All of the above

Discuss

Answer & Solution

Answer: Option D

Solution:

The compressed air may be used -In gas turbine plants - For operating pneumatic drills -In starting and supercharging of I.C. engines

The overall isothermal efficiency of the compressor is defined as the ratio of

A) Work required to compress the air isothermally to the actual work required to compress the air for the same pressure ratio B) Isothermal power to the shaft power or B.P. of the motor or engine required to drive the compressor C) Volume of free air delivery per stroke to the swept volume of the piston D) Isentropic power to the power required to drive the compressor

Discuss

Answer & Solution

Answer: Option B

Solution:

The overall isothermal efficiency of the compressor is defined as the ratio of Isothermal power to the shaft power or B.P. of the motor or engine required to drive the compressor

The overall isothermal efficiency of compressor is defined as the ratio of

A) Isothermal h.p. to the BHP of motor B) Isothermal h.p. to adiabatic h.p. C) Power to drive compressor to isothermal h.p. D) Work to compress air isothermally to work for actual compression

Discuss

Answer & Solution

Answer: Option A

Solution:

The overall isothermal efficiency of compressor is defined as the ratio of Isothermal h.p. to the BHP of motor

The work ratio of a gas turbine plant is defined as the ratio of

A) Net work output and heat supplied B) Net work output and work done by turbine C) Actual heat drop and isentropic heat drop D) Net work output and isentropic heat drop

Discuss

Answer & Solution

Answer: Option B

Solution:

The work ratio of a gas turbine plant is defined as the ratio of Net work output and work done by turbine

The maximum propulsion efficiency of a turbojet is attained at around following speed

A) 550 km/hr B) 1050 km/hr C) 1700 km/hr D) 2400 km/hr

Discuss

Answer & Solution

Answer: Option D

Solution:

The maximum propulsion efficiency of a turbojet is attained at around following speed 2400 km/hr

The minimum work required for a three stage reciprocating air compressor is ________ the work required for each stage.

A) Equal to B) Double C) Three times D) Six times

Discuss

Answer & Solution

Answer: Option C

Solution:

The minimum work required for a three stage reciprocating air compressor is three times the work required for each stage.

The working fluid in a turbine is

A) In two phases B) In three phases C) In a single phase D) In the form of air and water mixture

Discuss

Answer & Solution

Answer: Option C

Solution:

The working fluid in a turbine is In a single phase

High air-fuel ratio is used in gas turbines

A) To increase the output B) To increase the efficiency C) To save fuel D) To reduce the exit temperature

Discuss

Answer & Solution

Answer: Option D

Solution:

High air-fuel ratio is used in gas turbines to reduce the exit temperature

An air receiver is to be placed outside. Should it be placed in

A) Sun B) Shade C) Rain D) Enclosed room

Discuss

Answer & Solution

Answer: Option B

Solution:

An air receiver is to be placed outside. Should it be placed in shade

100

The velocity of air entering in a rocket is _________ as compared to an aircraft.

A) Zero B) Less C) More D) Same

Discuss

Answer & Solution

Answer: Option A

Solution:

The velocity of air entering in a rocket is zero as compared to an aircraft.