IC Engines and Nuclear Power Plants - Data Intensity 4 Multiple Questions and Answers.




6.The ignition quality of diesel oil is expressed by
A. cetane number
B. octane number
C. calorific value
D. none of these

7.In a four stroke cycle petrol engine, the expansion
A. starts at top dead centre and ends at bottom dead centre
B. starts at 30� before top dead centre and ends at 50� before bottom dead centre
C. starts at 30� after top dead centre and ends at 50� after bottom dead centre
D. may start and end anywhere

8.A fuel of an octane number rating of 75 matches in knocking intensity as a mixture of
A. 75% iso-octane and 25% normal heptane
B. 75% normal heptane and 25% iso-octane
C. 75% petrol and 25% diesel
D. 75% diesel and 25% petrol

9.A two stroke cycle engine gives __________ the number of power strokes as compared to the four stroke cycle engine, at the same engine speed.
A. half
B. same
C. double
D. four times

10.By higher octane number of spark ignition fuel, it is meant that the fuel has
A. higher heating value
B. higher flash point
C. lower volatility
D. longer ignition delay

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