Technician A says that a gear on the camshaft drives the distributor. Technician B says the exhaust and intake valves each operate on a separate lobe on the camshaft. Who is correct?

Question

Quizplus · Accepted Answer

Technician A is correct - in most engines, there is a gear on the end of the camshaft that drives the distributor. 
Technician B is also correct - the camshaft has lobes or protrusions that operate the intake and exhaust valves separately, controlling the opening and closing of each valve.

Technician a Says That a Gear on the Camshaft Drives