| 1. | The compression ignition engines are governed by ? | |
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hit and miss governing
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qualitative governing
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quantitative governing
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combination of (b) and (c)
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Report Question| 2. | The ignition quality of petrol 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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all of these
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| 3. | The pressure at the end of compression, in diesel engines, is approximately ? | |
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10 bar
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20 bar
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25 bar
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35 bar
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| 4. | In order to prevent knocking in spark ignition engines, the charge away from the spark plug should have ? | |
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low density
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low temperature
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long ignition delay
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all of these
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| 5. | Which of the following statement is correct regarding normal cetane ? | |
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It is a standard fuel used for knock rating of diesel engines
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Its chemical name is normal-hexadecane
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It has long carbon chain structure
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all of the above
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| 6. | In a coil ignition system of petrol engines, a condenser is connected across the contact breaker in order to ? | |
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prevent sparking across the gap between the points
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cause more rapid break of the primary current, giving a higher voltage in the circuit
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both (a) and (b)
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none of the above
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| 7. | The power actually developed by the engine cylinder of an I.C. engine is known as ? | |
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theoretical power
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actual power
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indicated power
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none of these
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| 8. | The fuels in order of decreasing knock tendency for spark ignition engines are ? | |
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paraffins, aromatics, napthenes
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paraffins, napthenes, aromatics
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napthenes, aromatics, paraffins
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napthenes, paraffins, aromatics
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| 9. | The brake power of a diesel engine, keeping other parameters constant, can be increased ? | |
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decreasing the density of intake air
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increasing the temperature of intake air
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increasing the pressure of intake air
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decreasing the pressure of intake air
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