Question 133Motor Plants - QMED
70% to passThe highest pressure in a diesel engine cylinder normally occurs _______________.
Aat TDC
Bbefore TDC
Cafter TDC
Dduring air starting
AI Explanation
The correct answer is C) after TDC (top dead center). In a diesel engine, the highest pressure in the cylinder typically occurs after the piston reaches TDC during the compression stroke. This is because the air-fuel mixture is compressed, causing the temperature and pressure to rise rapidly, reaching a peak just after the piston passes TDC. The other answer choices are incorrect - the pressure does not peak at TDC (A), before TDC (B), or during air starting (D), which refers to the process of starting the engine using compressed air rather than the normal combustion process.
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