Tanker · Question #280

Which is true about tank brakes?

A. Often air-over-hydraulic or full air, must be inspected before each trip
B. Always hydraulic
C. No brakes on tank
D. Trailer brake only

Correct answer: A. Often air-over-hydraulic or full air, must be inspected before each trip
Explanation: Most modern tanks use full air brakes.

Why this question matters on the Tanker exam

This question is one of the 64 we have for the Tanker CDL knowledge test. The official AAMVA Commercial Driver License Manual chapter on Tanker covers exactly this topic, and most state DMV exams pull from the same chapter. Memorizing the right answer is fine for passing, but understanding the underlying rule is what keeps you safe on the road and out of trouble with FMCSA inspectors.

If this topic gave you trouble, take the full Tanker practice test to drill it across all the related questions. We recommend reading every explanation, even on the questions you got right, because the manual phrasing in the explanation often shows up word-for-word on the real exam.

Take the full Tanker practice test →