| 1. | The degree of reaction in an axial flow compressor is defined as the ratio of static enthalpy rise in the ? | |
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rotor to static enthalpy rise in the stator
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stator to static enthalpy rise in the rotor
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rotor to static enthalpy rise in the stage
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stator to static enthalpy rise in the stage
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Report Question| 2. | The type of rotary compressor used in aeroplanes, is of ? | |
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centrifugal type
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axial flow type
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radial flow type
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none of these
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| 3. | The efficiency of a jet engine is higher at ? | |
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low speeds
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high speeds
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low altitudes
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high altitudes
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| 4. | The air power of the compressor is also known as ? | |
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indicated power
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brake power
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frictional power
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frictional power
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| 5. | A closed cycle gas turbine works on ? | |
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Carnot cycle
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Rankine cycle
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Ericsson cycle
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Joule cycle
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| 6. | The volumetric efficiency for reciprocating air compressors ? | |
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10 to 40%
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40 to 60%
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60 to 70%
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70 to 90%
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| 7. | The volume of air delivered by the compressor is called ? | |
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free air delivery
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compressor capacity
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swept volume
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none of these
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| 8. | In a centrifugal compressor, an increase in speed at a given pressure ratio causes ? | |
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increase in flow
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decrease in flow
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increase in efficiency
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increase in flow and decrease in efficiency
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| 9. | The axial flow compressor is preferred in air-craft gas turbines because of ? | |
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low frontal area
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higher thrust
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high pressure rise
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none of these
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| 10. | Gas turbine as compared to internal combustion engine ? | |
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can be driven at a very high speed
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produces uniform torque
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has more efficiency
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all of these
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