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Internal Combustion Engines

Internal Combustion Engines
The process of breaking up or a liquid into fine droplets by spraying is called

Vaporisation
Ionization
Carburetion
Atomization

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Internal Combustion Engines
The cetane number of diesel oil, generally available, is

25 to 30
40 to 55
30 to 40
20 to 25

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Internal Combustion Engines
In order to eliminate knocking in compression ignition engines, there should be

Short delay period
High self ignition temperature of fuel
Late auto-ignition
Low compression ratio

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Internal Combustion Engines
The inlet valve of a four stroke cycle internal combustion engine remains open for

180°
270°
230°
130°

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Internal Combustion Engines
If the temperature of intake air in internal combustion engine increases, then its efficiency will

Increase
Remain same
Decrease
None of the listed here

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Internal Combustion Engines
The increase of efficiency of a compression ignition engine, as the load decreases, is due to

Higher maximum temperature
Quantitative governing
Hit and miss governing
Qualitative governing

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