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Internal Combustion Engines

Internal Combustion Engines
Combustion in compression ignition engines is

Both (A) and (B)
Homogeneous
Heterogeneous
Laminar

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Internal Combustion Engines
The loud pulsating noise heard within the cylinder of an internal combustion engine is known as

Turbulence
Supercharging
Detonation
Pre-ignition

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Internal Combustion Engines
Air fuel ratio at which a petrol engine cannot work is

20 : 1 and less
0.62569444444444
0.41736111111111
0.33402777777778

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

120
50
100

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Internal Combustion Engines
If one cylinder of a diesel engine receives more fuel than the others, then for that cylinder the

Engine starts overheating
Exhaust will be smoky
Scavenging occurs
Piston rings would stick into piston grooves

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Internal Combustion Engines
The fuels in order of decreasing knock tendency for spark ignition engines are

Paraffin, aromatic, napthene
Paraffin, napthene, aromatic
Napthene, aromatics, paraffin
Napthene, paraffin, aromatic

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