FREE Pennsylvania CDL Combination Test 2024 (Practice Test)

1. Which of the following is NOT part of inspecting the coupling?

Making sure the fifth-wheel jaws have closed around the shank of the kingpin.
Making sure there is no space between the upper and the lower fifth-wheel
Checking that the locking lever is in the "lock" position
Checking for enough clearance between the rear of the tractor frame and the landing gear.

2. Which of the following is NOT TRUE? When you drive a tractor-trailer combination with ABS, you should:

brake the same way, regardless of whether you have ABS on the tractor, the trailer, or both.
use only the braking force necessary to stop safely.
monitor your tractor and trailer as you slow down, and if it is safe to do so, back off the brakes to stay in control.
drive slower to keep your vehicle in a straight line.

3. Rollovers happen when drivers:

4. Transporting hanging meat requires special attention. Why?

Because refrigerated trucks have less traction.
Because you have to drive fast to get it delivered fresh.
Because hanging meat can be an unstable load with a high center of gravity.
All of the above.

5. Overloading a vehicle with cargo can have negative effects on all of the following except:

6. Which of the following is NOT part of testing the tractor protection valve?

Pulling forward slowly, then applying the trailer brakes.
Stepping on and off the brake pedal several times to reduce the air pressure in the tanks.
Shutting off the engine.
Charging the trailer air brake system.

7. You are coupling a tractor to a semi-trailer. After checking the trailer height but before supplying air to the trailer, you should:

inspect the fifth-wheel.
connect the air lines to the trailer.
raise the front trailer supports.
lock the trailer brakes.

8. To test the service brake:

push the brake pedal firmly while slowly moving backward.
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.

9. When backing a trailer, turn the wheel right to make the cab go ________ and the trailer go ________.

10. When backing a trailer, you should:

avoid correcting the drift.
try to position your vehicle so you can back in a straight line.
never make pull-ups to reposition your vehicle.
turn the steering wheel in the direction you want to go.

PA CDL COMBINATION TEST - PRACTICE TEST