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.

The correct answer is:<br /><br />d. The air/fuel mixture is drawn into the crankcase as the piston moves down in the cylinder.<br /><br />In a spark-ignited two-stroke engine, the air/fuel mixture is indeed drawn into the crankcase as the piston moves down in the cylinder. This process is known as the intake stroke. During the compression stroke, the piston moves up, compressing the air/fuel mixture. The spark plug ignites the compressed mixture, causing a small explosion that forces the piston down, generating power. During the exhaust stroke, the piston moves up again, pushing the burned gases out of the cylinder.