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
All of these
To determine the information, which cannot be obtained by calculations

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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 decrease maximum temperature
Reduce maximum pressure and maximum temperature
Increase maximum pressure and maximum temperature

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