Question

which of the following statements is true concerning spark - ignited two - stroke engines?
a. during the exhaust stroke, gases are expelled from the cylinder when the piston is near bottom dead center.
b. during the exhaust stroke, gases are expelled from the engine when the engine is near top dead center.
c. it takes two revolutions of the engine to produce power.
d. the air/fuel mixture is drawn into the crankcase as the piston moves down in the cylinder.

Explanation:

In a spark - ignited two - stroke engine, during the exhaust stroke, when the piston is near bottom dead center, exhaust ports are uncovered and gases are expelled from the cylinder. Also, as the piston moves down, the air/fuel mixture is drawn into the crankcase. Two - stroke engines produce power every revolution.

Answer:

A. During the exhaust stroke, gases are expelled from the cylinder when the piston is near bottom dead center.
D. The air/fuel mixture is drawn into the crankcase as the piston moves down in the cylinder.