Question

unlike the cranking compression test, which checks the sealing capability of the cylinder, the running compression test checks the engines ability to move air ______ the cylinder.
select one:
a. into and out of
b. around inside
c. both a and b
d. neither a nor b

Explanation:

The cranking compression test checks cylinder sealing. The running compression test focuses on the engine's ability to move air in a functional way. Air movement in an engine typically involves intake (into) and exhaust (out of) processes. Option b ("Around inside") is not a standard description of typical air - movement in an engine's cylinder for a compression - related test. Since option a is a valid description of air movement (intake and exhaust) relevant to engine operation and compression - related testing (as it affects the overall air - handling ability of the engine), and option b is not relevant, option c (Both A and B) and option d (Neither A nor B) are incorrect.

Answer:

a. Into and out of