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Internal Combustion Engines

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

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

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Internal Combustion Engines
The process of breaking up or a liquid into fine droplets by spraying is called

Carburetion
Ionization
Atomization
Vaporisation

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

200°
125°
180°
235°

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Internal Combustion Engines
Combustion in compression ignition engines is

Both (A) and (B)
Laminar
Homogeneous
Heterogeneous

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

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

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Internal Combustion Engines
The probability of knocking in diesel engines is increased by

Low volatility
All of these
High self ignition temperature
Higher viscosity

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