Gas cap testing is being discussed. Technician A says the tester applies twenty inches of vacuum to the cap and measures its rate of leakage. Technician B says if the wrong adapter was used, the cap will fail the test even if it is good. Who is correct?

Question

Quizplus · Accepted Answer

Technician B is correct because using the wrong adapter can cause a good gas cap to fail the test. Technician A is incorrect because the tester does not apply twenty inches of vacuum; it typically applies pressure to check for leaks.

Gas Cap Testing Is Being Discussed