QuestionApril 25, 2025

In a standard 4 -stroke piston engine, the lowest piston ring closest to the crankcase is called the A oil ring. B seat ring. C centering ring. D compression ring.

In a standard 4 -stroke piston engine, the lowest piston ring closest to the crankcase is called the A oil ring. B seat ring. C centering ring. D compression ring.
In a standard 4 -stroke piston engine, the lowest piston ring closest to the crankcase is called the
A oil ring.
B seat ring.
C centering ring.
D compression ring.

Solution
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Answer

A oil ring. Explanation 1. Identify the function of the lowest piston ring The lowest piston ring closest to the crankcase is designed to control oil consumption by scraping excess oil off the cylinder walls and returning it to the crankcase. This is called the **oil ring**.

Explanation

1. Identify the function of the lowest piston ring<br /> The lowest piston ring closest to the crankcase is designed to control oil consumption by scraping excess oil off the cylinder walls and returning it to the crankcase. This is called the **oil ring**.
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