Commercial Driver's License Flashcards

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

Answer: Regularly as part of your scanning routine

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

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

Answer: Push the brake pedal firmly at about 5 mph

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

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

Answer: A 60-day CDL disqualification

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

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

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

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

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

Answer: The air brake system pressure has dropped to a dangerous level

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

How much space should you keep in front of you for every 10 feet of vehicle length when traveling below 40 mph?

Answer: One second

Allow at least one second of following distance per 10 feet of vehicle length at speeds under 40 mph, adding one more second above 40 mph.

Which of the following is true about using a CB radio or mobile phone while driving a CMV?

Answer: Hands-free mobile phone use is permitted

Federal rules allow hands-free phone use but prohibit holding, dialing, or texting on a mobile device while driving a CMV.