Question 453Motor Plants - Assistant Engineer
70% to passWhen a fuel injection nozzle overheats, which of the problems listed can be expected?
AThe fuel metering will vary.
BThe fuel will explode.
CThe cylinder head will crack.
DThe engine will stop.
AI Explanation
The correct answer is A) The fuel metering will vary. When a fuel injection nozzle overheats, it can cause the fuel metering to become irregular or inconsistent. This is because the heat affects the fuel atomization and spray pattern from the nozzle, leading to variations in the air-fuel ratio being delivered to the engine cylinders. The other options are incorrect - B) The fuel will not explode due to nozzle overheating, C) The cylinder head will not crack, and D) The engine will not stop solely due to nozzle overheating. The key issue is the disruption to the proper fuel metering, which can cause engine performance problems.
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