Internal Combustion Engines
The purpose of testing an internal combustion engine is

All of these
To satisfy the customer regarding the performance of the engine
To conform the data used in design, the validity of which may be doubtful
To determine the information, which cannot be obtained by calculations

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Internal Combustion Engines
Flash point of 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
Temperature at which it catches fire without external aid

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