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.

The compression ratio for the compressor is always _________ unity.

A) Equal to B) Less than C) More than D) None of these

Discuss

Answer & Solution

Answer: Option C

Solution:

The compression ratio is simply the ratio of the absolute stage discharge pressure to the absolute stage suction pressure.
The compression ratio for the compressor is always More than unity.

The hottest point in a gas turbine is

A) At the base B) At the tip C) In the center D) Between ~ to i of the blade height

Discuss

Answer & Solution

Answer: Option D

Solution:

The hottest point in a gas turbine is between ~ to i of the blade height.
The hottest component is the turbine blades, in particular the first-stage turbine inlet guide vanes, which are the most forward part of the exhaust section of the engine, which is the section exposed to the hot exhaust gases.

Temperature of gases at end of compression as compared to exhaust gases in a gas turbine is

A) Higher B) Lower C) Equal D) Can't be compared

Discuss

Answer & Solution

Answer: Option B

Solution:

Temperature of gases at end of compression as compared to exhaust gases in a gas turbine is lower

The maximum temperature in a gas turbine is

A) 200°C B) 500°C C) 700°C D) 1000°C

Discuss

Answer & Solution

Answer: Option C

Solution:

The maximum temperature in a gas turbine is 700°C

In a jet propulsion

A) The propulsive matter is ejected from within the propelled body B) The propulsive matter is caused to flow around the propelled body C) Its functioning does not depend upon presence of air D) None of the above

Discuss

Answer & Solution

Answer: Option B

Solution:

Jet propulsion is the propulsion of an object in one direction, produced by ejecting a jet of fluid in the opposite direction.
By Newton's third law, the moving body is propelled in the opposite direction to the jet.

The fuel consumption in gas turbines is accounted for by

A) Lower heating value B) Higher heating value C) Heating value D) Higher calorific value

Discuss

Answer & Solution

Answer: Option A

Solution:

The fuel consumption in gas turbines is accounted for by Lower heating value

The indicated work per unit mass of air delivered is

A) Directly proportional to clearance volume B) Greatly affected by clearance volume C) Not affected by clearance volume D) Inversely proportional to clearance volume

Discuss

Answer & Solution

Answer: Option C

Solution:

The indicated work per unit mass of air delivered is Not affected by clearance volume

Which of the following plants is smallest and lightest for generating a given amount of power?

A) Gas turbine plant B) Petrol engine C) Diesel engine D) Solar plant

Discuss

Answer & Solution

Answer: Option A

Solution:

Gas turbine plant is smallest and lightest for generating a given amount of power

In jet engines, for the efficient production of large power, fuel is burnt in an atmosphere of

A) Vacuum B) Atmospheric air C) Compressed air D) Oxygen alone

Discuss

Answer & Solution

Answer: Option C

Solution:

In jet engines, for the efficient production of large power, fuel is burnt in an atmosphere of compressed air

Gas turbine blades are given a rake

A) Equal to zero B) In the direction of motion of blades C) Opposite to the direction of motion of blades D) Depending on the velocity

Discuss

Answer & Solution

Answer: Option B

Solution:

Gas turbine blades are given a rake In the direction of motion of blades