How to Check a Fuel Tank for Leaks Following Repairs

What is the correct method to check a fuel tank for leaks following a patch or welded repair?

a) Visual inspection only
b) Pressure and leak testing
c) Ultrasonic testing
d) Temperature monitoring
Final answer:

Answer:

To check a fuel tank for leaks following a patch or welded repair, pressure and leak testing is the correct method.

Explanation:

Following a patch or welded repair of a fuel tank, it's essential to ensure there are no leaks. The correct method for checking a fuel tank for leaks after such repairs is through pressure and leak testing. This process involves sealing the tank and then pressurizing it with air or another inert gas. A soapy solution is typically applied to the welds and repaired area; the presence of bubbles would indicate a leak. Alternatively, the tank can be submerged in water, and air pressure is applied to look for escaping bubbles.

Additionally, other non-destructive testing methods like ultrasonic testing may also be used to ensure the integrity of the welds and the surrounding metal, although it's not typically the main method for leak testing.