FREE ME CDL Combination Test - Practice Test 2024

1. After starting the engine, the ABS light stays on. This means:

the ABS is in Neutral.
the ABS is not working properly.
the ABS is working properly.

2. To test the service brake:

shift your transmission to a low gear, pump the brake pedal three times, then hold it down for five seconds.
push the brake pedal firmly while going about 5 mph.
gently try to pull forward with the trailer parking brake on, then release the brake.

3. During a walk around inspection of a combination vehicle, drivers should check that:

the glide plate is securely mounted to the trailer frame.
all locking pins are present and locked in place.
All of the above.

4. To be in the proper position for coupling, the fifth wheel should:

tilted up towards the rear of the tractor.
be tilted down towards the rear of the tractor.
have its jaws closed around the shank of the kingpin.

5. _________ rigs are much more likely to roll over in an accident than _________ rigs.

6. When uncoupling a trailer, after shutting off the trailer air supply to lock the trailer brakes, you should:

pull the tractor forward until the fifth-wheel comes out from under the trailer.
back up gently to ease the pressure on the fifth-wheel locking jaws.
inspect the trailer supports.

7. Which of the following is NOT a way to determine if your trailer is equipped with ABS (antilock braking system)?

It was built after March 1, 1998.
It has yellow ABS malfunction lamps.
The letters "ABS" are printed on the side of the steering wheel.

8. Strong winds can make it difficult to stay in your lane, especially when:

9. Most heavy vehicles require ________ change gears.

10. After supplying air to the trailer brake system, you should check the brake system for crossed air lines by:

shutting the engine off so you can hear the brakes.
applying and releasing the trailer brakes and listening for the sound of trailer brakes.
All of the above.

MAINE CDL COMBINATION PRACTICE TEST