Question

at what speed does the crankshaft rotate as compared to the camshaft?
○ a. same speed
○ b. twice as fast
○ c. half speed
○ d. one-third speed

Explanation:

In an internal combustion engine, the crankshaft rotates twice for every single rotation of the camshaft (this is related to the valve timing and the engine's cycle, where the camshaft controls valve operation and the crankshaft is linked to piston movement; a typical four - stroke engine has the crankshaft completing two revolutions for one full cycle, while the camshaft completes one to open/close valves at the right times). So the crankshaft rotates twice as fast as the camshaft.

Answer:

b. Twice as fast