Question 9Motor Plants - 1st Asst/Chief
70% to passWhich of the conditions listed could cause the cylinder relief valves on a large, low- speed, propulsion diesel engine to lift?
APlugged injector nozzles
BExcessive fuel injection
CIncorrect crankshaft clearances
DVery late injection timing
AI Explanation
The correct answer is B) Excessive fuel injection. Explanation: Excessive fuel injection can cause the cylinder relief valves on a large, low-speed, propulsion diesel engine to lift. This is because an excessive amount of fuel injected into the cylinder can lead to a rapid rise in cylinder pressure, which in turn can cause the relief valves to open and release the excess pressure. The other options, such as plugged injector nozzles, incorrect crankshaft clearances, or very late injection timing, would not directly lead to the lifting of the cylinder relief valves.
Related Questions
Q135:The amount of fuel delivered by a unit injector is controlled by the____________... Q59:A pre-arrival test is being performed with the engine on bridge control. The ves... Q56:In a Bendix starter drive, the pinion engagement with the flywheel ring gear is ... Q27:In what figure of the illustration does the crosshead experience the greatest si... Q210:If a crankcase explosion due to a hot spot were to occur, the size of the explos...
Ready to test your knowledge?
Take a Motor Plants - 1st Asst/Chief Practice ExamOfficial Resources