RBSE Prav Voc Automotive Practice Questions - Rajasthan RBSE Praveshika Automotive - Vocational Code 101 Exam

In a four-stroke spark-ignition engine, the power stroke occurs when:

The intake valve opens and air alone enters the cylinder Compressed air–fuel mixture is ignited and expanding gases push the piston down The exhaust valve stays closed and no combustion takes place Only the starter motor turns the crankshaft without combustion

Correct Answer:

Compressed air–fuel mixture is ignited and expanding gases push the piston down

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