LOUISIANA CDL COMBINATION PRACTICE TEST

View instructions
Drivers who want to drive combination vehicles must pass the combination vehicles test. The Louisiana CDL combination test consists of 20 questions, and you'll need at least 16 correct answers to pass (80%). The test covers the combination vehicles section of the Louisiana CDL Manual. Take this practice test now to prepare for the actual LA CDL combination test!
1. You should always try to back toward the driver's side because:
backing toward the left side is more dangerous.
you can more easily correct any steering errors.
you can watch the rear of your vehicle out the side window.
None of the above.
2. If you must drive slowly, how should you alert following drivers?
Flash your brake lights
Turn on your taillights
Help them out by signaling when it is safe to pass
Use your emergency flashers if it is legal
3. Which of the following is NOT part of a trailer air line system?
Glad hands
Emergency air-line
Kingpin
Service air-line
4. If there is a cargo fire in a van or box trailer, you should:
open the doors, especially if your cargo contains hazardous materials.
keep the doors shut.
keep driving until you reach help.
enlist the help of bystanders.
5. To test the service brake:
push the brake pedal firmly while going about 5 mph.
shift your transmission to a low gear, pump the brake pedal three times, then hold it down for five seconds.
gently try to pull forward with the trailer parking brake on, then release the brake.
push the brake pedal firmly while slowly moving backward.
6. When driving a combination vehicle, which of the following 2 things will help you prevent a rollover?
Keeping cargo near the center of the vehicle and driving slowly on turns.
Keeping cargo near the ground and driving slowly on the highway.
Keeping the cargo near the ground and driving slowly around turns.
Keeping cargo near the center of the vehicle and driving slowly on the highway.
7. You are driving a combination vehicle and must use your brakes to avoid a crash. You should:
use stab braking or controlled braking.
use the parking brake.
push the brake pedal as hard as you can and hold it there.
brake lightly and hold the steering wheel firmly.
8. Which of the following is NOT a good rule for using turn signals?
Cancel your signal after you have turned.
Signal continuously until you have completed the turn.
Signal well before you turn.
Put your turn signal on after the turn.
9. Most heavy vehicles require ________ change gears.
double clutching
triple shifting
double shifting
single clutching
10. You are driving on a steep downgrade in the proper low gear. Your "safe" speed is 40 mph. When your speed reaches 40 mph, you should:
maintain your current speed, and apply the brakes when you reach 50 mph to gradually reduce your speed to 40 mph.
apply the brakes to gradually reduce your speed to 35 mph, and then release the brakes.
increase your speed to approximately 45 mph, and then apply release the brakes.
apply the brakes to quickly reduce your speed to 25 mph, and then release the brakes.
 
Page 1 of 2
Next page
NOT SURE YOU WILL PASS? GET CDL PREMIUM NOW! - Learn More

CDL Combination Test (LA)

Number of questions: 20
Correct answers to pass:16
Passing score:80%
Share This Online CDL Test
Rate this CDL Combination Test ()
4.5 out of 5
based on 189 votes