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Internal Combustion Engines

Internal Combustion Engines
The injection pressure in a diesel engine is about

100 bar
10 bar
500 bar
150 bar

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Internal Combustion Engines
The _________ engines can work on very lean mixture of fuel.

Spark ignition
Compression ignition
None of these
Both (A) and (B)

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Internal Combustion Engines
The air standard efficiency of an Otto cycle compared to diesel cycle for the given compression ratio is

More
Same
Less
More or less depending on power rating

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Internal Combustion Engines
A fuel of cetane number 40 has the same ignition quality as a mixture of

40% diesel and 60% petrol
40% cetane and 60% alpha methyl naphthalene
40% petrol and 60% diesel
40% alpha methyl naphthalene and 60% cetane

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Internal Combustion Engines
By higher octane number of spark ignition fuel, it is meant that the fuel has

Higher heating value
Longer ignition delay
Higher flash point
Lower volatility

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Internal Combustion Engines
Supercharging is the process of supplying the intake air to the engine cylinder at a density ___ the density of the surrounding atmosphere.

Equal to
Greater than
None of the listed here
Less than

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