ELDT - Entry Level Driver Training Coupling and Uncoupling Questions and Answers 2

Question 1

When coupling a tractor to a trailer, what should you check before backing under the trailer?

Accepted Answer

That the kingpin is not bent or broken

Answer

A bent or broken kingpin will not lock properly in the fifth wheel, creating an extremely dangerous situation where the trailer could separate from the tractor.

Question 2

After coupling, how do you test that the fifth wheel is securely locked?

Accepted Answer

Apply the trailer brakes and pull forward gently

Answer

The tug test involves applying the trailer brakes and gently pulling forward in low gear to verify the fifth wheel jaws are locked around the kingpin.

Question 3

What is the correct height for the trailer when coupling?

Accepted Answer

The trailer should be slightly lower than the fifth wheel

Answer

The trailer nose should be slightly lower than the fifth wheel so that it is raised by the fifth wheel during coupling, ensuring the kingpin engages properly.

Question 4

During uncoupling, when should you lower the landing gear?

Accepted Answer

Before disconnecting the air lines and pulling the release handle

Answer

Landing gear must be lowered before disconnecting anything to support the trailer's weight and prevent it from tipping or falling when separated from the tractor.

Question 5

What should you do if the fifth wheel release handle is hard to pull during uncoupling?

Accepted Answer

Back up slightly to relieve pressure on the kingpin

Answer

Backing up slightly shifts the weight off the locking jaws, relieving pressure on the kingpin and making the release handle easier to operate.

Entry Level Driver Training (ELDT) Practice Test

Entry Level Driver Training (ELDT) Practice Test

ELDT - Entry Level Driver Training Coupling and Uncoupling Questions and Answers 2