Question 79Motor Plants - QMED70% to pass
The possibility of a diesel engine crankcase explosion will be increased by operating an engine _______________.
AI Explanation
The correct answer is B) with a leaking crankcase inspection cover gasket.
A leaking crankcase inspection cover gasket can allow air to be drawn into the crankcase, increasing the possibility of a diesel engine crankcase explosion. This is because a leak in the crankcase can introduce additional air, creating an explosive air-fuel mixture. In contrast, the other options do not directly contribute to an increased risk of crankcase explosion.
Specifically, option A is incorrect as a crankcase vacuum between 1.5" and 2" of water is within the normal operating range and does not indicate an issue. Option C is incorrect as a crankcase exhaust blower that vents to fresh air actually helps prevent the buildup of explosive gases. Option D is incorrect as cooler sea water temperatures do not directly impact the risk of crankcase explosion.
Related Questions
#77 Which of the following problems could develop due to the accumulation of oil vapors in the crankcase of a diesel engine? #78 The purpose of an oil mist detector in a main propulsion diesel engine is to warn of _______________.#80 If a diesel engine has been stopped because of piston seizure due to severe overheating, the crankcase _______________.#81 Ethylene glycol, when used as a coolant in a closed cooling system for a diesel engine, is more advantageous than untreated raw water because it_______________.#82 According to the illustrated main engine cooling water systems diagram, which of the following heat exchangers would be isolated and bypassed while maneuvering in or out of port? Illustration MO-0111