Question 210Motor Plants - 1st Asst/Chief
70% to passIf a crankcase explosion due to a hot spot were to occur, the size of the explosion is dependent on which of the following?
AThe temperature of the hot spot in the crankcase.
BThe amount of debris in the oil in the crankcase.
CThe ratio of oil mist to air in the crankcase.
DThe amount of water in the oil in the crankcase.
AI Explanation
The correct answer is C) The ratio of oil mist to air in the crankcase. The size of a crankcase explosion due to a hot spot is primarily dependent on the ratio of oil mist to air in the crankcase. When the oil mist reaches a certain concentration and is ignited by the hot spot, it can cause a violent explosion. The temperature of the hot spot, the amount of debris in the oil, or the water content in the oil are not the primary factors that determine the explosion size. Instead, the concentration of the oil mist is the critical element that governs the potential for a large crankcase explosion.
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