Question 215Motor Plants - 1st Asst/Chief70% to pass
Oil in a scavenging air space on a slow-speed diesel engine can be ignited by which of the following?
AI Explanation
The correct answer is A) Excessive piston ring blow-by.
Excessive piston ring blow-by can allow oil to enter the scavenging air space, where it can be ignited by the high temperatures present. This is due to the combustion gases being able to bypass the piston rings and enter the crankcase, bringing oil with them. The other options, such as a burned exhaust valve seat, hot main bearing, or early fuel injection, do not directly relate to the presence of oil in the scavenging air space and its potential for ignition.
Related Questions
#213 After stopping a diesel engine with a high main bearing temperature, what is the time one needs to wait before a diesel engine crankcase can be opened? #214 Which of the following is one of the ways to prevent a scavenging fire on a slow speed diesel engine? #216 If a scavenging air space fire occurs on a slow speed diesel engine and the engine is stopped, which of the following should be done to prevent distortion due to heat? #217 Which of the following would indicate a scavenging air fire in a slow speed diesel engine? #218 If a diesel engine were running at 20% overload with a smoky exhaust, you should_______________.