Internal Combustion Engines
The basic requirement of a good combustion chamber is

Low compression ratio
Low volumetric efficiency
High thermal efficiency and power output
Minimum turbulence

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

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

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