What is the minimum number of compression rings required in an engine?(a) 5(b) 1(c) 2(d) 3I had been asked this question in unit test.My question is taken from Engine Components topic in chapter Basic Engine Components of Automotive Engine Design

What is the minimum number of compression rings required in an engine?

1.	What is the minimum number of compression rings required in an engine?(a) 5(b) 1(c) 2(d) 3I had been asked this question in unit test.My question is taken from Engine Components topic in chapter Basic Engine Components of Automotive Engine Design
Answer» Right choice is (c) 2 The best explanation: A MINIMUM of TWO COMPRESSION rings are required because of the high-pressure difference between the combustion chamber and the crankcase at the beginning of the power stroke. This difference MAY be as high as 70 atmospheres.

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