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Internal Combustion Engines

Internal Combustion Engines
A mixture containing 65% of iso-octane and 35% of normal heptane will have

Cetane number 35
Octane number 65
Octane number 35
Cetane number 65

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Internal Combustion Engines
The knocking in diesel engines may be prevented by

Raising the compression ratio
All of these
Reducing the delay period
Increasing the inlet pressure of air

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Internal Combustion Engines
For maximum power generation, the air fuel ratio for a petrol engine for vehicles, is of the order of

0.62569444444444
0.50069444444444
0.37569444444444
0.75069444444444

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Internal Combustion Engines
Gaseous fuel guarantees are based on

High heat value of oil
Low heat value of oil
Calorific value of oil
Mean heat value of oil

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Internal Combustion Engines
The specific fuel consumption per BH hour for a petrol engine is approximately

0.25 kg
0.2 kg
0.3 kg
0.15 kg

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Internal Combustion Engines
The voltage required to produce a spark across the gap, between the sparking points is

2000 to 4000 volts
6000 to 10,000 volts
4000 to 6000 volts
10,000 to 12,000 volts

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MORE MCQ ON Internal Combustion Engines

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