4 stroke engine understanding test.

TrailBeast said

During one 360 degree turn of the crankshaft of an 8 cylinder four stroke engine, how many cylinders fire on the compression stroke? :D

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Four, assuming you don't have a Ford with bad ignition coils.

TrailBeast said

So if you got that answer, then how is it that engine RPM's are counted?
By 2 360 degree turns of the crank or one?
Isn't one 360 degree turn one RPM?

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One revolution of the crank is one revolution anywhere. Except maybe in South America. Revolutions in that area are erratic.

Besides which, if a four-stroke cycle engine was counted as two revolutions per revolution, then a four-stroke cycle engine running the same speed as a two-stroke cycle engine would be at different RPM. Which is to say, 2 would equal 1. But it ain't. Or don't. Whatever.