The Following Section consists of Multiple Choice Questions on Compressors, Gas Dynamics and Gas Turbines.
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Compressors, Gas Dynamics and Gas Turbines MCQ 1
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Question 1 of 20
1. Question
1 pointsGas turbine as compared to steam turbine
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Question 2 of 20
2. Question
1 pointsIntercooling in gas turbines
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Question 3 of 20
3. Question
1 pointsThe compression ratio in a gas turbine is
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Question 4 of 20
4. Question
1 pointsOnly rocket engines can be propelled to space because
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Question 5 of 20
5. Question
1 pointsAn aftercooler is used to
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Question 6 of 20
6. Question
1 pointsHigh air-fuel ratio in gas turbines
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Question 7 of 20
7. Question
1 pointsThe ratio of the volume of free air delivery per stroke to the swept volume of the piston, is known as
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Question 8 of 20
8. Question
1 pointsThe ratio of the indicated power to the shaft power or brake power of the motor or engine required to drive the compressor, is called
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Question 9 of 20
9. Question
1 pointsThe type of rotary compressor used in aeroplanes, is of
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Question 10 of 20
10. Question
1 pointsIn a reciprocating air compressor, the compression work per kg of air
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Question 11 of 20
11. Question
1 pointsThe degree of reaction in an axial flow compressor is defined as the ratio of static enthalpy rise in the
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Question 12 of 20
12. Question
1 pointsReheating in a gas turbine
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Question 13 of 20
13. Question
1 pointsIn a centrifugal compressor, the ratio of the __________ to the blade velocity is called slip factor.
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Question 14 of 20
14. Question
1 pointsThe air is delivered __________ in one revolution in case of a three-lobbed rotor.
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Question 15 of 20
15. Question
1 pointsIn a centrifugal compressor, the highest Mach number leading to shock wave in the fluid flow occurs at
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Question 16 of 20
16. Question
1 pointsA machine used to raise the pressure of air is called
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Question 17 of 20
17. Question
1 pointsThe overall efficiency of the compressed air system is the
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Question 18 of 20
18. Question
1 pointsIn a single acting reciprocating air compressor, without clearance, the compression of air may be
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Question 19 of 20
19. Question
1 pointsThe axial flow compressor is preferred in air-craft gas turbines because of
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Question 20 of 20
20. Question
1 pointsWhich of the following statement is correct as regard to centrifugal compressors?
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Compressors, Gas Dynamics and Gas Turbines MCQ 2
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Question 1 of 20
1. Question
1 pointsIn a four stage compressor, if the pressure at the first and third stage are 1 bar and 16 bar, then the delivery pressure at the fourth stage will be
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Question 2 of 20
2. Question
1 pointsThe compressed air may be used
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Question 3 of 20
3. Question
1 pointsThe volumetric efficiency for reciprocating air compressors is about
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Question 4 of 20
4. Question
1 pointsThe maximum temperature in a gas turbine is
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Question 5 of 20
5. Question
1 pointsThe stagnation pressure rise in a centrifugal compressor takes place
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Question 6 of 20
6. Question
1 pointsIn a jet propulsion
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Question 7 of 20
7. Question
1 pointsWhich of the following statement is wrong?
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Question 8 of 20
8. Question
1 pointsIn a single acting reciprocating compressor, the suction, compression and delivery of air takes place in __________ of the piston.
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Question 9 of 20
9. Question
1 pointsThe maximum delivery pressure in a rotary air compressor is
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Question 10 of 20
10. Question
1 pointsIntercooling in multi-stage compressors is done
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Question 11 of 20
11. Question
1 pointsThe ratio of workdone per cycle to the stroke volume of the compressor is known as
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Question 12 of 20
12. Question
1 pointsWhich of the following statement is correct?
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Question 13 of 20
13. Question
1 pointsIn the aircraft propellers
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Question 14 of 20
14. Question
1 pointsThe type of rotary compressor used in gas turbines, is of
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Question 15 of 20
15. Question
1 pointsThe volume of air delivered by the compressor is called
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Question 16 of 20
16. Question
1 pointsThe efficiency of a jet engine is higher at
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Question 17 of 20
17. Question
1 pointsIn axial flow compressor, exit flow angle deviation from the blade angle is a function of
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Question 18 of 20
18. Question
1 pointsRotary compressors are used for delivering
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Question 19 of 20
19. Question
1 pointsIn a centrifugal compressor, an increase in speed at a given pressure ratio causes
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Question 20 of 20
20. Question
1 pointsA large clearance Volume in a reciprocating compressor results in
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Compressors, Gas Dynamics and Gas Turbines MCQ 3
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Question 1 of 20
1. Question
1 pointsThe ratio of the net work obtained from the gas turbine plant to the turbine work is known as
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Question 2 of 20
2. Question
1 pointsGas turbine as compared to internal combustion engine
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Question 3 of 20
3. Question
1 pointsA closed cycle gas turbine consists of a
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Question 4 of 20
4. Question
1 pointsA closed cycle gas turbine works on
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Question 5 of 20
5. Question
1 pointsWhich of the following statement is correct relating to rocket engines ?
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Question 6 of 20
6. Question
1 pointsEuler’s equation can be used for
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Question 7 of 20
7. Question
1 pointsA rocket engine uses __________ for the combustion of its fuel.
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Question 8 of 20
8. Question
1 pointsA jet engine has
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Question 9 of 20
9. Question
1 pointsThe mean effective pressure of the compressor is the
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Question 10 of 20
10. Question
1 pointsThe reason for volumetric efficiency of reciprocating compressor being less than 100 percent is
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Question 11 of 20
11. Question
1 pointsThe thrust of a jet propulsion power unit can be increased by
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Question 12 of 20
12. Question
1 pointsA turbo-prop is preferred to turbo-jet because
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Question 13 of 20
13. Question
1 pointsThe air power of the compressor is also known as
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Question 14 of 20
14. Question
1 pointsThe overall isothermal efficiency of the compressor is defined as the ratio of
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Question 15 of 20
15. Question
1 pointsThe minimum work required for a three stage reciprocating air compressor is __________ the work required for each stage.
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Question 16 of 20
16. Question
1 pointsIn a high pressure compressor, the delivery pressure is
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Question 17 of 20
17. Question
1 pointsWhen the outlet angle from the rotor of a centrifugal compressor is more than 90°, then the blades are said to be
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Question 18 of 20
18. Question
1 pointsIn a double acting compressor, the air is compressed
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Question 19 of 20
19. Question
1 pointsIn a centrifugal compressor, the flow of air is __________ to the axis of compressor.
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Question 20 of 20
20. Question
1 pointsFor minimum work required to compress and deliver a quantity of air by multi-stage compression,
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Compressors, Gas Dynamics and Gas Turbines MCQ 4
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Question 1 of 20
1. Question
1 pointsSeparators are generally used in air compressor installations
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Question 2 of 20
2. Question
1 pointsIf the flow of air through the compressor is perpendicular to its axis, then it is a
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Question 3 of 20
3. Question
1 pointsIn air compressors, free air delivery means the
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Question 4 of 20
4. Question
1 pointsThe gas in cooling chamber of a closed cycle gas turbine is cooled at
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Question 5 of 20
5. Question
1 pointsThe assumption made in two stage compression with intercooler is that
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Question 6 of 20
6. Question
1 pointsIn a closed cycle gas turbine, the air is compressed
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Question 7 of 20
7. Question
1 pointsIn a single stage, single acting reciprocating air compressor, without clearance volume, the workdone is minimum during
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Question 8 of 20
8. Question
1 pointsIf the flow of air through the compressor is parallel to its axis, then the compressor is
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Question 9 of 20
9. Question
1 pointsWhen air is to be compressed at a high pressure, then it is advantageous to use
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Question 10 of 20
10. Question
1 pointsThe absolute pressure of air at the outlet of a compressor is called
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Question 11 of 20
11. Question
1 pointsThe degree of reaction is usually kept __________ for all types of axial flow compressors.
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Question 12 of 20
12. Question
1 pointsStandard air is the air at __________ and relative humidity of 36 percent.
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Question 13 of 20
13. Question
1 pointsIn a single stage, single acting reciprocating air compressor without clearance volume, the workdone is maximum during
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Question 14 of 20
14. Question
1 pointsThe compressor capacity is defined as the
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Question 15 of 20
15. Question
1 pointsThe volume of air sucked by the compressor during its suction stroke is called
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Question 16 of 20
16. Question
1 pointsThe volumetric efficiency of a compressor
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Question 17 of 20
17. Question
1 pointsThe multi-stage compression ofair as compared to single stage compression
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Question 18 of 20
18. Question
1 pointsWhich one of the following is the effect of blade shape on performance of a centrifugal compressor ?
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Question 19 of 20
19. Question
1 pointsIn a jet engine, the air-fuel ratio is
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Question 20 of 20
20. Question
1 pointsWhich of the following bladings will give maximum pressure rise in a centrifugal compressor, assuming the same overall dimensions, blade inlet angle and rotational speeds ?
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