ELDT Coupling and Uncoupling 3

Question 1

Before uncoupling, why should you lower the landing gear until it makes firm contact with the ground?

Accepted Answer

To support the trailer weight once the tractor pulls out

Answer

The landing gear must firmly support the trailer so it does not drop when the tractor is removed.

Question 2

When lowering the landing gear, why avoid raising the trailer off the fifth wheel too much?

Accepted Answer

It makes recoupling difficult and can damage the gear

Answer

Raising the trailer too high strains the landing gear and complicates recoupling later.

Question 3

What is the proper order for the fifth wheel release before pulling the tractor out?

Accepted Answer

Pull the release handle to open the jaws

Answer

You must pull the fifth wheel release handle to unlock the jaws before the tractor can pull free of the kingpin.

Question 4

After disconnecting the air lines during uncoupling, what should you do with them?

Accepted Answer

Secure them to prevent damage and dirt

Answer

Store or hang the air lines on the dummy couplers so they stay clean and undamaged.

Question 5

When easing the tractor forward to clear the fifth wheel from under the trailer, you should:

Accepted Answer

Pull out slowly and smoothly

Answer

Pulling forward slowly prevents jerking the trailer or damaging the landing gear.

Entry Level Driver Training (ELDT) Practice Test