A cargo tank is designed for vacuum loading and has a full-opening rear head. Per 49 CFR 180.407, what periodic pressure retest interval applies to this tank?

Cargo Tank Specifications,... Test 2/3

✗

Not quite.

Wrong. Six months is the external visual inspection interval for this same tank type, not its pressure retest interval.

The correct answer is C: 2 years.

✗

Not quite.

Wrong. One year is the exception interval for insulated tanks with no manhole, a different configuration.

The correct answer is C: 2 years.

✓

Correct!

Correct. 49 CFR 180.407(c) sets a 2-year pressure retest interval for cargo tanks designed for vacuum loading with a full-opening rear head.

✗

Not quite.

Wrong. Five years is the standard interval that applies only when no exception, like this one, applies.

The correct answer is C: 2 years.