- Entry Level Driver Training Coupling and Uncoupling Questions and Answers Flashcards

What should you inspect on the fifth wheel before coupling?

Answer: The fifth wheel plate should be greased and the jaws should be open

The fifth wheel plate needs adequate grease to reduce friction and prevent wear, and the jaws must be open to accept the kingpin during coupling.

When coupling, what gear should the tractor be in when backing under the trailer?

Answer: The lowest reverse gear

Using the lowest reverse gear gives maximum control and the slowest speed, which is critical for precise alignment with the kingpin.

After connecting the air lines during coupling, what should you do next?

Answer: Charge the trailer air system and check for leaks

After connecting air lines, you must supply air to the trailer brake system and check all connections for leaks before the vehicle is road-ready.

Why is it important to check under the trailer after uncoupling?

Answer: To verify the landing gear pads are on solid ground

The landing gear pads must rest on solid, level ground to properly support the trailer weight. Soft ground can cause the pads to sink and the trailer to tip.

What is the correct order for connecting airlines and electrical cord during coupling?

Answer: Air lines first, then electrical cord

Air lines should be connected first to establish brake functionality before connecting the electrical cord, ensuring safety systems are operational first.

What could happen if you forget to remove the wheel chocks before pulling the tractor away during uncoupling?

Answer: The tractor tires could be damaged

Wheel chocks placed at the tractor tires during uncoupling must be removed before driving away, otherwise the tires could be damaged when driving over them.