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Internal Combustion Engines

Internal Combustion Engines
Iso-octane (C₈H₁₈) has octane number of

50
0
120
100

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Internal Combustion Engines
A mixture containing 65% of iso-octane and 35% of normal heptane will have

Octane number 65
Octane number 35
Cetane number 35
Cetane number 65

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Internal Combustion Engines
Which of the following medium is compressed in a Diesel engine cylinder?

Air and fuel
Air alone
Fuel alone
Air and lub oil

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Internal Combustion Engines
Pre-ignition is caused by the spontaneous combustion of the mixture before the end of the compression stroke, and is due to

Overheated spark plug points
Any one of the listed here
Red hot carbon deposits on cylinder walls
Cylinder walls being too hot

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Internal Combustion Engines
Iso-octane (C₈H₁₈) has octane number of

120
100
50

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Internal Combustion Engines
Crankcase explosion in I.C. engines usually occurs as

Never occurs
First a big explosion followed by a mil explosion
First a mild explosion followed by a bi explosion
Both mild and big explosions occurs simultaneously

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