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Internal Combustion Engines

Internal Combustion Engines
Diesel as compared to petrol is

More difficult to ignite
Highly ignitable
Less difficult to ignite
None of these

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Internal Combustion Engines
The normal heptane (C₇H₁₆) is given a rating of ________ octane number.

120
50
100

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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
Hit and miss governing
Qualitative governing
Quantitative governing

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Internal Combustion Engines
The following volume of air is required for consuming 1 liter of fuel by a four stroke engine

910 m3
1 m3
56 m3
5 m3

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Internal Combustion Engines
In a diesel engine, the duration between the time of injection and ignition, is known as

Burning period
Period of ignition
Delay period
Pre-ignition period

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Internal Combustion Engines
The volumetric efficiency of a well designed engine may be

40 to 60%
60 to 70%
30 to 40%
75 to 90%

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