Internal Combustion Engines
As compared to air standard cycle, in actual working, the effect of variation in specific heats is to

Decrease maximum pressure and increase maximum temperature
Increase maximum pressure and maximum temperature
Increase maximum pressure and decrease maximum temperature
Reduce maximum pressure and maximum temperature

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Internal Combustion Engines
Pour point of fuel oil is the

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
Temperature at which it solidifies or congeals

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