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Internal Combustion Engines

Internal Combustion Engines
Diesel as compared to petrol is

None of these
Less difficult to ignite
Highly ignitable
More difficult to ignite

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Internal Combustion Engines
A stoichiometric air-fuel ratio is

Rich mixture for over loads
Chemically correct mixture
Lean mixture
Rich mixture for idling

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Internal Combustion Engines
The operation of forcing additional air under pressure in the engine cylinder is known as

Pre-ignition
Supercharging
Turbulence
Scavenging

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

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

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Internal Combustion Engines
In order to eliminate knocking in compression ignition engines, there should be

Low compression ratio
High self ignition temperature of fuel
Short delay period
Late auto-ignition

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Internal Combustion Engines
Supercharging is the process of supplying the intake air to the engine cylinder at a density ___ the density of the surrounding atmosphere.

Less than
Greater than
Equal to
None of the listed here

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