Which statement about the gas-cap test is true?

• A. The VI includes a gas-cap pressure test
• B. The gas-cap test is separate from the VI and the VI only inspects the cap visually
• C. The gas-cap test is only for new vehicles
• D. The gas cap must be replaced if the vehicle fails VI

Answer: (B)

The question tests understanding of how the gas-cap is evaluated in the inspection process. The Visual Inspection (VI) looks at the cap’s condition and fit—Is the cap present, undamaged, and able to seal when tightened? It does not perform any functional, leak-detection testing. The gas-cap test, which checks the cap’s sealing ability and potential vapor leaks from the fuel system, is a separate procedure that uses specialized equipment. That separation is why the statement stating that the gas-cap test is separate from the VI and that the VI only inspects the cap visually is the true one.

The other options don’t fit because the VI does not include a gas-cap pressure test, the test applies to a broad range of vehicles (not just new ones), and failing the gas-cap test doesn’t automatically require replacing the cap—repairs and retesting are determined based on the specific issue found.