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Internal Combustion Engines

Internal Combustion Engines
The calorific value of gaseous fuels is expressed in terms of

kcal
kcal/kg
kcal/m3
kcal/m²

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Internal Combustion Engines
A 5 BHP engine running at full load would consume diesel of the order of

0.3 kg/hr
5 kg/hr
3 kg/hr
1 kg/hr

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Internal Combustion Engines
Pre-ignition is caused by the spontaneous combustion of the mixture before the end of the compression stroke, and is due to

Red hot carbon deposits on cylinder walls
Any one of the listed here
Overheated spark plug points
Cylinder walls being too hot

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Internal Combustion Engines
The thermal efficiency of diesel engines on weak mixtures is

Unaffected
Lower
Higher
Dependent on other factors

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Internal Combustion Engines
Supercharging is essential in

Gas turbines
Diesel engines
Petrol engines
Aircraft engines

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Internal Combustion Engines
The fuel in diesel engine is normally injected at pressure of

90-130 kg/cm²
5-10 kg/cm²
20-25 kg/cm²
60-80 kg/cm²

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