Internal Combustion Engines
The voltage required to produce a spark across the gap, between the sparking points is

4000 to 6000 volts
2000 to 4000 volts
10,000 to 12,000 volts
6000 to 10,000 volts

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Internal Combustion Engines
In a four stroke cycle diesel engine, the compression

Starts at 40° before top dead center and ends at 40° after top dead center
May start and end anywhere
Starts at 40° after bottom dead center and ends at 10° before top dead center
Starts at top dead center and ends at 40° before bottom dead center

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Internal Combustion Engines
Pour point of fuel oil is the

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
Temperature at which it solidifies or congeals
Indicated by 90% distillation temperature i.e., when 90% of sample oil has distilled off
It catches fire without external aid

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