| 1. | A large clearance volume in a reciprocating compressor results in ? | |
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reduced volume flow rate
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increased volume flow rate
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lower suction pressure
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lower delivery pressure
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Report Question| 2. | In a jet propulsion unit, the products of combustion after passing through the gas turbine are discharged into ? | |
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atmosphere
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vacuum
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discharge nozzle
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back to the compressor
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| 3. | Intercooling in multi-stage compressors is done ? | |
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to cool the air during compression
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to cool the air at delivery
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to enable compression in two stages
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to minimise the work of compression
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| 4. | In a jet propulsion ? | |
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the propulsive matter is ejected from within the propelled body
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the propulsive matter is caused to flow around the propelled body
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its functioning does not depend upon presence of air
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none of the above
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| 5. | For minimum work required to compress and deliver a quantity of air by multi-stage compression ? | |
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the compression ratio in each stage should be same
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the intercooling should be perfect
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the workdone in each stage should be same
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all of the above
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| 6. | A jet engine has ? | |
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no propeller
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propeller in front
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propeller at back
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propeller on the top
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| 7. | The 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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compressor efficiency
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volumetric efficiency
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isothermal efficiency
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mechanical efficiency
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| 8. | The work done on a compressor will be minimum if air is taken from ? | |
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the atmosphere
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a source at 0° C
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a source of low temperature air
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a source of high temperature air
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| 9. | The reason for volumetric efficiency of reciprocating compressor being less than 100 percent is ? | |
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pressure drop across the valves
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superheating in compressor
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clearance volume and leakages
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all of these
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| 10. | The air is delivered ........ in one revolution in case of a three-lobbed rotor ? | |
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two times
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three times
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four times
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six times
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