| 1. | In compression ignition engines, swirl denotes a ? | |
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haphazard motion of the gases in the chamber
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rotary motion of the gases in the chamber
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radial motion of the gases in the chamber
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none of the above
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Report Question| 2. | The thermal efficiency of a standard Otto cycle for a compression ratio of 5.5 will be ? | |
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25%
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50%
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70%
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100%
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| 3. | The ratio of the volume of charge admitted at N.T.P. to the swept volume of the piston is called ? | |
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mechanical efficiency
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overall efficiency
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volumetric efficiency
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relative efficiency
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| 4. | Nuclear reactors are used ? | |
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to produce heat for thermoelectric power
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to produce fissionable material
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to propel ships, submarines, aircrafts
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all of these
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| 5. | The nuclear power station at Tarapur has the reactor of the .........type ? | |
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pressurized water
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boiling water
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gas cooled
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liquid metal cooled
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| 6. | The basic requirement of a good combustion chamber is ? | |
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minimum turbulence
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low compression ratio
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high thermal efficiency and power output
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low volumetric efficiency
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| 7. | The purpose of testing an internal combustion engine is ? | |
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to determine the information, which can not be obtained by calculations
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to conform the data used in design, the validity of which may be doubtful
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to satisfy the customer regarding the performance of the engine
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all of the above
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| 8. | The specific fuel consumption per B.P. hour for a diesel engine is about ? | |
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0.2kg
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0.25 kg
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0.3 kg
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0.35 kg
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| 9. | Number of working strokes per min. for a four stroke cycle engine are .......... the engine in r.p.m. ? | |
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equal to
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one-half
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twice
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four-times
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| 10. | The thermal efficiency of diesel engines on weak mixtures is ? | |
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unaffected
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lower
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higher
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dependent on other factors
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