Question: When backing a tractor under a trailer you should expect that?

5. When backing under a tractor under a trailer you should expect: A Trailer will be lifted slightly when the tractor backs under it.

When backing a trailer under a trailer you should?

Turn the wheel as sharply as possible. Not use the brakes. Explanation When backing a straight truck, you would turn the wheel in the direction you want to go. By contrast, when backing a vehicle with a trailer, you must turn the steering wheel in the direction opposite of where you want to go.

When coupling a semi trailer before you back the tractor underneath it you should?

When you get ready to back under the semi trailer you should line up: A About 12 degrees off the line of the trailer.

What should you hook up before backing under?

What should you hook up before backing under? A The emergency and service air lines.

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How does a trailer respond when you turn the wheel to the right while backing?

Backing up with your trailer requires you to turn the steering wheel in the opposite direction of what you normally do when backing up without a trailer. In other words, if you turn the top of the steering wheel right, the trailer will go left.

What is the first step in coupling a tractor semi trailer?

Coupling Tractor Semi-Trailers

  • STEP 1: Inspect Fifth Wheel. Check for damaged/missing parts. …
  • STEP 2: Inspect Area and Chock Wheels. …
  • STEP 3: Position Tractor. …
  • STEP 4: Back Slowly. …
  • STEP 5: Secure Tractor. …
  • STEP 6: Check Trailer Height. …
  • STEP 7: Connect Air Lines to Trailer. …
  • STEP 8: Supply Air to Trailer.

When turning a corner with a tractor trailer trailer rear wheels follow?

When a vehicle goes around a corner, the rear wheels follow a different path than the front wheels. This is called “offtracking” or “cheating.” Figure 6-4 to the right shows how offtracking causes the path followed by a tractor-semi to be wider than the rig itself. Longer vehicles will offtrack more.

When checking that the trailer is securely coupled to the tractor?

While checking if the trailer is securely coupled to the tractor, the landing gears should be: A Slightly raised. Step 11: Check Connection for Security – Raise the trailer landing gear slightly off the ground. Take more free practice tests for other CDL topics with our free cdl test online now!

What means tractor trailer?

Definition of tractor trailer

US. : a large truck with a long trailer attached to the back of it : semitrailer.

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When hooking up a tractor to a trailer you will know the trailer is at the right height when the?

The trailer is at the right height when: It will be raised slightly when the tractor is backed under it. Which part of the kingpin should the locking jaws close around?

What happens if trailer breaks away from tractor?

You are driving a combination vehicle when the trailer breaks away, pulling apart both air lines. You expect the trailer brakes to come on and: A The tractor protection valve to close. The pressure loss could be caused by a trailer breaking loose, thus tearing apart the emergency air hose.

When you back a trailer you should position your vehicle?

When backing a trailer, you turn the steering wheel in the opposite direction. Once the trailer starts to turn, you must turn the wheel the other way to follow the trailer. Whenever you back up with a trailer, try to position your vehicle so you can back in a straight line.