Which action is not part of the Visible Smoke Test?

• A. Idle Test, Crankcase Test, BAR Snap Test.
• B. Idle Test, Crankcase Test.
• C. Crankcase Test, BAR Snap Test.
• D. Idle Test, BAR Snap Test.

Answer: (A)

Visible Smoke Test focuses on visually evaluating exhaust smoke during idle and a quick throttle snap. The Crankcase Test, on the other hand, is a separate procedure that checks for issues related to crankcase pressure and oil leakage, not for visible exhaust smoke. Because the Visible Smoke Test does not include the crankcase procedure, any option that lists the Crankcase Test as part of the set for the visible test is not part of it. That’s why the combination that includes Idle Test, Crankcase Test, and BAR Snap Test is the one that contains a non-part action, making it the correct choice for “not part.” The tests that are actually part of the visible smoke evaluation are Idle Test and BAR Snap Test.