Internal Combustion Engines
The air requirement of a petrol engine during starting compared to theoretical air required for complete combustion is

Less
Same
More
May be more or less depending on engine capacity

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Internal Combustion Engines
Volatility of diesel fuel oil is

It catches fire without external aid
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
Temperature at which it solidifies or congeals

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