Technician A says that the two-stroke spark engine uses a dual-lobe camshaft. Technician

B says that a typical two-stroke spark engine does not use a crankshaft. Who is correct?

A two-stroke (or two-cycle) engine is a type of internal combustion engine which completes a power cycle with two strokes (up and down movements) of the piston during only one crankshaft revolution. In a two-stroke engine, the end of the combustion stroke and the beginning of the compression stroke happen simultaneously, with the intake and exhaust (or scavenging) functions occurring at the same time.

Technician A says that the two-stroke spark engine uses a dual-lobe camshaft. Technician B says that a typical two-stroke spark engine does not use a crankshaft. Who is correct?

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Technician A says that the two-stroke spark engine uses a dual-lobe camshaft. Technician

B says that a typical two-stroke spark engine does not use a crankshaft. Who is correct?