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-7 section-2

For an irreversible gas turbine cycle, the efficiency and work ratio both depend on

A) Pressure ratio alone B) Maximum cycle temperature alone C) Minimum cycle temperature alone D) Both pressure ratio and maximum cycle temperature

Discuss

Answer & Solution

Answer: Option D

Solution:

For an irreversible gas turbine cycle, the efficiency and work ratio both depend on Both pressure ratio and maximum cycle temperature

For minimum work in multistage compression, assuming same index of compression in all stages

A) Work done in first stage should be more B) Work done in subsequent stages should increase C) Work done in subsequent stages should decrease D) Work done in all stages should be equal

Discuss

Answer & Solution

Answer: Option D

Solution:

For minimum work in multistage compression, assuming same index of compression in all stages Work done in all stages should be equal

In a single acting reciprocating air compressor, without clearance, the compression of air may be

A) Isothermal B) Polytropic C) Isentropic D) Any one of these

Discuss

Answer & Solution

Answer: Option D

Solution:

In a single acting reciprocating air compressor, without clearance, the compression of air may be
- Isothermal
- Polytropic
- Isentropic

The propulsive power of the rocket is (where v₁ = Jet velocity and v₂ = Aircraft velocity)

A) $$\frac{{{\text{v}}_1^2 - {\text{v}}_2^2}}{{2{\text{g}}}}$$ B) $$\frac{{{{\left( {{{\text{v}}_1} - {{\text{v}}_2}} \right)}^2}}}{{2{\text{g}}}}$$ C) $$\frac{{{\text{v}}_1^2 - {\text{v}}_2^2}}{{\text{g}}}$$ D) $$\frac{{{{\left( {{{\text{v}}_1} - {{\text{v}}_2}} \right)}^2}}}{{\text{g}}}$$

Discuss

Answer & Solution

Answer: Option A

Solution:

The propulsive power of the rocket is $$\frac{{{\text{v}}_1^2 - {\text{v}}_2^2}}{{2{\text{g}}}}$$
Where ,
v₁ = Jet velocity
v₂ = Aircraft velocity

Euler's equation is applicable for

A) Centrifugal compressor B) Axial compressor C) Pumps D) All of the above

Discuss

Answer & Solution

Answer: Option D

Solution:

Euler's equation is applicable for -Centrifugal compressor -Axial compressor -Pumps

The compressor capacity is defined as the

A) Actual volume of the air delivered by the compressor when reduced to normal temperature and pressure conditions B) Volume of air delivered by the compressor C) Volume of air sucked by the compressor during its suction stroke D) None of the above

Discuss

Answer & Solution

Answer: Option B

Solution:

The compressor capacity is defined as the Volume of air delivered by the compressor

In a single stage, single acting reciprocating air compressor without clearance volume, the work-done is maximum during

A) Isothermal compression B) Isentropic compression C) Polytropic compression D) None of these

Discuss

Answer & Solution

Answer: Option B

Solution:

In a single stage, single acting reciprocating air compressor without clearance volume, the work-done is maximum during isentropic compression

In a single stage, single acting reciprocating air compressor, without clearance volume, the work-done is minimum during

A) Isothermal compression B) Isentropic compression C) Polytropic compression D) None of these

Discuss

Answer & Solution

Answer: Option A

Solution:

In a single stage, single acting reciprocating air compressor, without clearance volume, the work-done is minimum during Isothermal compression

In a centrifugal compressor, the flow of air is ________ to the axis of compressor.

A) Parallel B) Perpendicular C) Inclined D) None of these

Discuss

Answer & Solution

Answer: Option B

Solution:

In a centrifugal compressor, the flow of air is perpendicular to the axis of compressor.

The most efficient method of compressing air is to compress it

A) Isothermally B) Adiabatically C) Isentropically D) Isochronically

Discuss

Answer & Solution

Answer: Option A

Solution:

The most efficient method of compressing air is to compress it Isothermally