Step 3 » GENERAL learning environment Category D (D, D1, Tb, Tv)

GENERAL Learning Environment Category D (D, D1, Tb, Tv)
Question 42 of 485

At the four-stroke engine, the speed of the camshaft, compared to the speed of the crankshaft, is:

A twice lower;
B twice higher;
C equal.

Explanation

Explanation text category D / driving tests drpciv:
At the four-stroke engine, the speed of the camshaft is twice lower compared to the speed of the crankshaft.
The intake and exhaust valves, controlled by the camshaft, must open only once in one engine cycle (engine cycle = the 4 strokes), therefore the camshaft has a single rotation while the crankshaft makes two rotations.
Correct answer: A
Driving tests drpciv category D explained.

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