Internal Combustion Engines
The object of supercharging the engine is

To reduce space occupied by the engine
To reduce mass of the engine per brake power
To increase the power output of an engine when greater power is required
All of these

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Internal Combustion Engines
Volatility of diesel fuel oil is

Temperature at which it solidifies or congeals
Indicated by 90% distillation temperature, i.e., when 90% of sample oil has distilled off
Minimum temperature to which oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame
It catches fire without external aid

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Internal Combustion Engines
Supercharging is the process of

Providing forced cooling air
Supplying compressed air to remove combustion products fully
Injecting excess fuel for raising more loads
Supplying the intake of an engine with air at a density greater than the density of the surrounding atmosphere

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Internal Combustion Engines
In a coil ignition system of petrol engines, a condenser is connected across the contact breaker in order to

Both (A) and (B)
None of these
Cause more rapid break of the primary current, giving a higher voltage in the secondary circuit
Prevent sparking across the gap between the points

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