Discussion
Which of the following is not a method of determining engine load?
Reading the knock sensor
Speed density calculation
Mass air flow measurement
The alpha-n method
Answer: A
A knock sensor detects abnormal combustion vibration and says nothing about how much air the engine is drawing. The other three are the recognised load determination strategies. Reading the definition literally, rather than recalling a summary, avoids the usual confusion. Naming the cost of a choice alongside its benefit is what turns a fact into a design decision. Checking which component actually carries the load settles most questions of this kind at once.
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