CDL Tank Emergency Systems and Tank Regulations

Question 1

A DOT-specification cargo tank must have an external visual inspection and leakage test at least how often?

Accepted Answer

Every year

Answer

Under 49 CFR 180.407, DOT-specification cargo tanks need an external visual inspection and leakage test at least once each year. The longer 5-year interval applies to pressure retests, not to these checks.

Question 2

A cargo tank is marked with a test date next to the letter "K". Which test does this code stand for?

Accepted Answer

Leakage test

Answer

The "K" test marking identifies the leakage test. The other letter codes identify other inspections, such as V for external visual and P for pressure.

Question 3

On the test markings of a DOT-specification cargo tank, what does the letter "P" indicate?

Accepted Answer

Pressure test

Answer

"P" marks the pressure test. The markings record which test was done and when.

Question 4

You are loading a tank that is only partly full. Which condition makes liquid surge most likely?

Accepted Answer

A smooth bore tank partly filled with liquid

Answer

A partly filled smooth bore tank has nothing to slow the liquid, so it can surge forward and back. Bulkheads and full tanks limit that movement.

Question 5

What is the main reason to leave outage (empty space) when filling a tank with a liquid that expands when warmed?

Accepted Answer

To allow room for the liquid to expand without overfilling or leaking

Answer

Liquids expand as they warm, so the outage gives the product room to grow. Without it, the tank could overflow or be stressed.

CDL Tank Practice Test

CDL Tank Practice Test

CDL Tank Emergency Systems and Tank Regulations