Tanker · Inspecting Tank Vehicles

A DOT specification cargo tank carries markings recording the tests and inspections it has passed. What has to appear in those markings?

1.The month and year, plus a letter for each test passed (V, I, P, L, T, K), at least 1.25 inches high near the plate or on the front headCorrect answer

2.The month and year only, because the type of test performed is recorded solely in the carrier's office file rather than stenciled on the tank itself

3.The inspector's name and certification number, stenciled on the rear head so it can be read clearly from behind the vehicle

4.The date the next test falls due, so that a driver can see at a glance from outside whether the tank's testing is still current

Explanation

The markings must be durable and legible, in English, giving the date as month and year together with the type of test or inspection performed, abbreviated V for external visual, I for internal visual, P for pressure, L for lining, T for thickness, and K for leakage, in letters and numbers at least 32 mm (1.25 inches) high, near the specification plate or anywhere on the front head. Note what this does and does not tell a driver: it records what the tank passed and when, not when the next one is due, so the due date has to be worked out from the interval that applies to that test. 49 CFR 383.119(h) makes retest and marking requirements a required knowledge area, but only for drivers of DOT specification tank vehicles, and it states nothing about the format, which comes from 49 CFR Part 180 instead. The wrong options strip out the test type, replace the whole scheme with inspector identification, or make the marking a due date, which is the one thing it is not.

Source: 49 CFR 180.415(b)

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A DOT specification cargo tank carries markings recording the tests and inspections it has passed. What has to appear in those markings?

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