Alabama Commercial Drivers License CDL Exam

Alabama Commercial Driver’s License (CDL) Exam Questions And Correct Answers (Verified Answers) Plus Rationales Q&A | Inst ant Download Pdf

• What is the minimum tread depth for front tires?
• 4/32 inch
• 4/32 inch
• 2/32 inch
• 1/32 inch

Front tires must have at least 4/32 inch tread depth to ensure proper traction and safety.

• When should you downshift an automatic transmission?
• At a stop
• Before going down a hill
• In the middle of the turn
• Only on icy roads

Downshifting before descending a hill helps maintain vehicle control and reduce brake use.

• / 4

• What does a yellow warning light on your dashboard typically indicate?
• Emergency failure
• Tire pressure is optimal
• A system needs attention
• Turn signal is on

Yellow lights are cautionary and usually signal a system needing inspection, such as engine or ABS.

• What is the proper way to hold the steering wheel?
• One hand on top
• 10 and 2
• Firm grip with both hands on opposite sides
• One hand at the bottom

Using both hands on opposite sides gives better control and quick reaction capability.

• When backing with a trailer, what is the best method?
• Use the passenger-side mirror
• Back and turn toward the driver’s side
• Keep the trailer straight
• Use a GPS camera only

Backing toward the driver’s side provides better visibility and control.

• / 4

• What is hydroplaning?
• Braking too hard
• Tire deflation
• Tires losing contact with the road on wet surfaces
• Vehicle skidding on gravel

Hydroplaning occurs when tires ride on water rather than the road, causing loss of control.

• How far ahead should you look while driving a commercial vehicle?
• 5 seconds
• 8 seconds
• 12-15 seconds
• 20 seconds

Looking ahead 12-15 seconds gives adequate time to react to hazards.

• What is the most important reason to inspect your vehicle?
• Save money on repairs
• Ensure safety for you and others
• To follow company rules
• Make it look good

Regular inspections prevent accidents and ensure the vehicle is safe for operation.

• / 4

• What does a convex mirror help you see?
• Details of license plates
• A wider area to reduce blind spots
• Fuel level
• Cargo inside

Convex mirrors increase visibility around the truck to spot vehicles or hazards in blind spots.

• Which of the following should be part of your emergency equipment?
• Flashlight and extra food
• Fire extinguisher, warning devices, spare electrical fuses
• First-aid kit
• Snow chains

Federal regulations require these basic emergency tools to address breakdowns or accidents.

• What is the purpose of retarders?
• Increase fuel efficiency
• Help slow the vehicle without using brakes
• Accelerate on hills
• Improve traction

Retarders assist in slowing the vehicle and reducing brake wear.

• / 4