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.
Related Questions
Q20:Fusible plugs are installed in fire-tube boilers to _______________. Q191:Upon conducting a machinery space round on a slow-speed main propulsion diesel, ... Q98:What type of reduction gear would most commonly be used with twin medium-speed p... Q36:If fuel oil were being discharged from the waste water outlet of a fuel oil disk... Q149:The expansion tank for a diesel engine closed cooling system is designed to main...
Ready to test your knowledge?
Take a Motor Plants - QMED Practice ExamOfficial Resources