AL DMV Commercial Driver's License 3

Question 1

When checking your mirrors while driving a large truck, how often should you glance at them?

Accepted Answer

Regularly as part of your scanning routine

Answer

Mirrors should be checked regularly as part of a constant scanning routine, not just for lane changes or turns.

Question 2

What is the proper way to test your service brakes after starting to drive?

Accepted Answer

Push the brake pedal firmly at about 5 mph

Answer

Test service brakes by driving forward at about 5 mph and pressing the pedal firmly to check for pulling or delay.

Question 3

A driver operating a CMV in Alabama is caught texting while driving. What can happen after a second conviction within three years?

Accepted Answer

A 60-day CDL disqualification

Answer

A second conviction for a serious traffic violation like texting within three years brings a 60-day disqualification.

Question 4

When driving down a long, steep downgrade, which braking technique is recommended?

Accepted Answer

Use engine braking and apply brakes firmly to slow 5 mph below your safe speed, then release

Answer

Use a low gear with engine braking and the snub technique, braking to 5 mph below your safe speed then releasing.

Question 5

What does it mean if your vehicle's low air pressure warning signal activates?

Accepted Answer

The air brake system pressure has dropped to a dangerous level

Answer

The low air warning activates when air brake system pressure falls below about 60 psi, requiring you to stop safely at once.

(AL DMV) Alabama Department of Motor Vehicle Practice Test