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Compressors Gas Dynamics And Gas Turbines Online Exam Quiz

Important questions about Compressors Gas Dynamics And Gas Turbines. Compressors Gas Dynamics And Gas Turbines MCQ questions with answers. Compressors Gas Dynamics And Gas Turbines exam questions and answers for students and interviews.

1. Air motors work on the cycle which is the reverse of the reciprocating air compressor cycle.

Options

A : Agree

B : Disagree

C :

D :

2. In gas turbines, the work input with intercooling is __________ the work input with no intercooling.

Options

A : less man

B : more than

C :

D :

3. In reciprocating air compressors, isothermal efficiency is used for all sorts of calculations.

Options

A : Correct

B : Incorrect

C :

D :

4. The perfect intercooling, in multistage compression, means that the temperature of air at inlet to subsequent stages is equal to the initial temperature.

Options

A : Agree

B : Disagree

C :

D :

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

Options

A : isothermal

B : polytropic

C : isentropic

D : any one of these

7. In open cycle turbo-jet engines used in military aircraft, reheating the exhaust gas from the turbine by burning, more fuel is used to increase the

Options

A : thrust and range of aircraft

B : efficiency of the engine

C : both (a) and (b)

D : none of these

8. The efficiency of roots blower __________ with the increase in pressure ratio.

Options

A : decreases

B : increases

C : does not change

D :

9. A closed cycle gas turbine works on

Options

A : Carnot cycle

B : Rankine cycle

C : Ericsson cycle

D : Joule cycle

10. The clearance, in a single stage, single acting reciprocating air compressor does not effect the workdone on the air and the power required for compressing the air.

Options

A : True

B : False

C :

D :

1. For a multi-stage compressor, the polytropic efficiency is constant throughout for all the stages.

Options

A : True

B : False

C :

D :

2. The degree of reaction is usually kept __________ for all types of axial flow compressors.

Options

A : 0.2

B : 0.3

C : 0.4

D : 0.5

3. The compressor capacity is defined as the

Options

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

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

Options

A : parallel

B : perpendicular

C : inclined

D : none of these

5. The ratio of the isentropic work to the Euler's work is known as pressure coefficient.

Options

A : Yes

B : No

C :

D :

6. In a double acting compressor, the air is compressed

Options

A : in one cylinder

B : in two cylinders

C : in a single cylinder on both sides of the piston

D : in two cylinders on both sides of the piston

7. If the flow of air through the compressor is perpendicular to its axis, then it is a

Options

A : reciprocating compressor

B : centrifugal compressor

C : axial flow compressor

D : turbo compressor

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

Options

A : equal to

B : double

C : three times

D : six times

9. For minimum work in multi-stage compression, the workdone on all stages should be equal.

Options

A : Yes

B : No

C :

D :

10. In a closed cycle gas turbine, the air is compressed

Options

A : isothermally

B : polytropically

C : isentropically

D : none of these

1. The reason for volumetric efficiency of reciprocating compressor being less than 100 percent is

Options

A : pressure drop across the valves

B : superheating in compressor

C : clearance volume and leakages

D : all of these

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