Question

In a dual air brake system, which parts of braking does each system typically operate?

Accepted Answer

One system operates the brakes on the rear axle/axles; the other operates the regular brakes on the front axle (and possibly a rear axle), both supply air to the trailer.

Answer

One system operates the brakes on the rear axle/axles and the trailer; the other operates the regular brakes on the front axle (and possibly a rear axle).

Answer

One system operates the brakes on the front and rear axles; the other operates the brakes on the trailer (and possibly a rear axle).

Answer

One system operates the brakes on the rear axle/axles; the other operates the regular brakes on the front axle and the trailer.

Question 32 - Air Brakes Test Practice Test for the CDL