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Internal Combustion Engines

Internal Combustion Engines
The inlet value of a four stroke cycle I.C engine remains open for nearly

235°
180°
125°
200°

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Internal Combustion Engines
An hmh flame speed is obtained in diesel engine when air fuel ratio is

About 10% of rich mixture
Chemically correct mixture
About 35% of rich mixture
Uniform throughout the mixture

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Internal Combustion Engines
The temperature of interior surface of cylinder wall in normal operation is not allowed to exceed

120°C
80°C
180°C
240°C

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

120
50
100

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Internal Combustion Engines
Diesel fuel, compared to petrol is

Less difficult to ignite
Highly ignitable
More difficult to ignite
Just about the same difficult to ignite

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Internal Combustion Engines
In order to mix air and petrol in the required proportion and to supply it to the engine during suction stroke, then ___ is employed.

Injector
Carburettor
None of the listed here
Fuel pump

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