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Quiz yourself by guessing what should be in each of the black rectangles below before clicking on it to display the answer.

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Flap 1

Flap 2

what fuel is generally used in a spark ignition engine

petrol

what fuel is used in a compression ignition engine

diesel

which part of an engine creates the combustible gas in a spark ignition engine

carburettor

which part of a tractor lifts an implement

link arms