Question

The length of time the valve is open, expressed in degrees of crankshaft rotation, is called camshaft

A. overlap.
B. lobe separation angle.
C. lift.
D. duration.

Answer 1

The answer is A duration-a rating system applied to the engine camshaft that determines how long the valve will be open relative to crankshaft movement in degrees

Hope this helps, God bless, and have a Greta day.
Brainliest is always appreciated :)