QuestionAugust 14, 2025

In a 4-stroke engine , which two events occur during the first downward stroke of the piston? A) Intake and compression B) Intake and power C) Intake and exhaust D) Only intake

In a 4-stroke engine , which two events occur during the first downward stroke of the piston? A) Intake and compression B) Intake and power C) Intake and exhaust D) Only intake
In a 4-stroke engine , which two events occur during the first downward stroke of the piston?
A) Intake and compression
B) Intake and power
C) Intake and exhaust
D) Only intake

Solution
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Answer

D) Only intake Explanation 1. Identify the 4-stroke cycle The 4-stroke engine cycle consists of intake, compression, power, and exhaust strokes. 2. Determine events in the first downward stroke During the first downward stroke, the piston moves down, drawing air-fuel mixture into the cylinder. This is known as the **intake** stroke.

Explanation

1. Identify the 4-stroke cycle<br /> The 4-stroke engine cycle consists of intake, compression, power, and exhaust strokes.<br /><br />2. Determine events in the first downward stroke<br /> During the first downward stroke, the piston moves down, drawing air-fuel mixture into the cylinder. This is known as the **intake** stroke.
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