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Internal Combustion Engines

Internal Combustion Engines
Which of the following fuel has little tendency towards detonation?

Normal heptane
Iso-octane
Benzene
Alcohol

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

Longer ignition delay
Lower volatility
Higher heating value
Higher flash point

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Internal Combustion Engines
The cetane (C₁₆H₃₄) which is a straight chain paraffin, is assigned a cetane number of

50
100
120

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Internal Combustion Engines
A diesel engine has

1 valve
4 valves
3 valves
2 valves

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Internal Combustion Engines
Compression loss in I.C engines occurs due to

All of these
Leaking piston rings
Clogged air inlet slots
Use of thick head gasket

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Internal Combustion Engines
The effective inhibitor of pre-ignition is

Lead
Water
Alcohol
None of these

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