| 1. | The correct sequence of the decreasing order of brake thermal efficiency of the three given basic types of engines is ? | |
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four stroke C.I. engine, four stroke S.L. engine, two stroke S.I. engine
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four stroke S.I. engine, four stroke C.I. engine, two stroke S.I. engine
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four stroke C.I. engine, two stroke S.I. engine, four stroke S.I. engine
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two stroke S.l. engine, four stroke S.I. engine, four stroke C.I. engine
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Report Question| 2. | In order to eliminate knocking in compression ignition engines, there should be ? | |
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short delay period
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late auto-ignition
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low compression ratio
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high self ignition temperature of fuel
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| 3. | A petrol engine has compression ratio from ? | |
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6 to 10
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10 to 15
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15 to 25
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25 to 40
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| 4. | If petrol is used in a diesel engine, then ? | |
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low power will be produced
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efficiency will be low
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higher knocking will occur
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black smoke will be produced
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| 5. | In petrol engines, the delay period is of the order of ? | |
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0.001 second
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0.002 second
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0.003 second
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0.004 second
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| 6. | The two reference fuels used for cetane rating are ? | |
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cetane and iso-octane
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cetane and alpha-methyl naphthalene
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cetane and normal heptane
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cetane and tetra ethyl lead
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| 7. | High speed compression engines operate on ? | |
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Otto cycle
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Diesel cycle
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Dual-combustion cycle
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all of these
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| 8. | The ignition quality of diesel oil is expressed by ? | |
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cetane number
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octane number
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calorific value
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none of these
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| 9. | The probability of knocking in diesel engines is increased by ? | |
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high self ignition temperature
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low volatility
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higher viscosity
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all of the
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| 10. | The secondary fuel used in nuclear power plants is ? | |
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U213 and Pu239
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U235 and Th232
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U235 and Pu238
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U233 and Pu238
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