Coupling and Uncoupling

If your fifth wheel isn’t greased properly, it can:

• Crack the Apron

• create steering problems

• snap the king pin

• both A and B

If your service line is loose or damaged, you'll

• Suffer a serious leak when you apply the brake

• increase your stopping distance

• Drain out your air tanks

• all the above

Backing under your trailer at a angle can:

• Push the trailer sideways

• keep the air lines from getting pinched

• damage/brake the landing gear

• both A and B

When performing the tug test, when should you stop?

• As soon as you feel resistance from the trailer

• As soon as the trailer brakes pop out

• When you hear a squeak from your trailer tires

• When your spotter gives you the proper hand signal

What is the safest way to lower or raise the trailer's landing gear in high gear?

• Face the trailer and spin the crank handle around you wrist.

• Face Parallel to the trailer and use two hands.

• Face the trailer, keep your feet apart, and rest on hand on the trailer.

• Face parallel to the trailer and rest one hand on the trailer.

How can you pull the fifth wheel release handle in a way that doesn't put yourself at risk of injury.

• Bend at the knees, keep your legs and feet clear of the rear tractor wheels, square yourself up with the handle, and pull straight out.

• Pull on the handle with your dominant arm using a zig-zag pattern to loosen the grip.

• Tuck your legs and feet between the rear tractor wheels to get better leverage.

• Grasp the handle with both hands, brace your foot against the tires, and pull

When you position a converter dolly for coupling, you should roll the converter dolly up to the front of the rear trailer and stop when:

• The Fifth wheel is fully under the apron

• the rear trailer kingpin is about a foot from jaw opening

• you hear the pintle hook snap into place.

• the fifth wheel makes contact with the front of the trail apron plate

When preparing to couple a rear trailer to the converter dolly, the trailer height should be ________ the center of the Fifth wheel.

• The same height as

• slightly lower than

• slightly higher then.

• Perpendicular

How can you ease the pressure on the fifth wheel locking jaws before uncoupling your tractor trailer.

• Park on a slight decline when possible

• lock the trailer brakes and back up gently

• Chock the trailer brakes

• All of the above

when uncoupling the converter dolly, why should you never unlock the pintle hook with the dolly under the trailer.

• You can unlock the pintle hook with the dolly under the rear trailer.

• The dolly tow bar could fly up, possibly causing injury

• The trailer could drop

• The trailer could start to roll.