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

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

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Internal Combustion Engines
The delay period in compression ignition engines depends upon

Nature of the fuel mixture strength
Relative velocity between the fuel injection and air turbulence pressure of residual gases
All of these
Temperature and pressure in the cylinder at the time of injection

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Internal Combustion Engines
Pour point of fuel oil is the

Temperature at which it solidifies or congeals
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
Indicated by 90% distillation temperature i.e., when 90% of sample oil has distilled off

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MORE MCQ ON Internal Combustion Engines