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Internal Combustion Engines

Internal Combustion Engines
The temperature of interior surface of cylinder wall in normal operation is not allowed to exceed

80°C
180°C
120°C
240°C

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Internal Combustion Engines
As a result of detonation in an I.C. engine, following parameter attains very high value

Peak pressure
Rate of rise of temperature
Rate of rise of pressure
Peak temperature

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Internal Combustion Engines
The probability of knocking in diesel engines is increased by

Low volatility
All of these
Higher viscosity
High self ignition temperature

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Internal Combustion Engines
The thermal efficiency of petrol and gas engines is about

0.15
0.3
0.7
0.5

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Internal Combustion Engines
The specific fuel consumption per B.P. hour for a diesel engine is about

0.25 kg
0.35 kg
0.3 kg
0.2 kg

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Internal Combustion Engines
The knocking tendency in compression ignition engines for a given fuel will be

None of these
Enhanced by increasing compression ratio
Enhanced by decreasing compression ratio
Dependent on other factors

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