Quick Answer: When Coupling A Tractor And A Semitrailer, Where Should You Position The Tractor?

When coupling the tractor to the trailer the proper position of the fifth wheel is?

When coupling, the proper position of the fifth wheel is: Tilted Down towards the end of the tractor. A trailer is most likely to jackknife when it is: Empty.

How should you align your tractor to a trailer when preparing to couple?

Put the tractor directly in front of the trailer. (Never back under the trailer at an angle because you might push the trailer sideways and break the landing gear.) Check position, using outside mirrors, by looking down both sides of the trailer.

How do you do coupling and uncoupling?

6.3 Coupling and Uncoupling

  1. STEP 1: Inspect Fifth Wheel. Check for damaged/missing parts.
  2. STEP 2: Inspect Area and Chock Wheels.
  3. STEP 3: Position Tractor.
  4. STEP 4: Back Slowly.
  5. STEP 5: Secure Tractor.
  6. STEP 6: Check Trailer Height.
  7. STEP 7: Connect Air Lines to Trailer.
  8. STEP 8: Supply Air to Trailer.
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What happens if the trailer is too high when you try to couple?

What might happen if the trailer is too high when you try to couple? If the trailer is too low, the tractor may stike and damage the trailer nose; if the trailer is too high, it may not couple correctly. If there is space something is wrong and the trailer would come loose very easily.

How much space should be between the upper and lower fifth wheel after coupling?

combo/doubles/triples endorsement questions 25 – 32

A B
26. TO MAKE SURE THE KINGPIN AND FIFTH WHEEL CONNECTION ARE SECURE, WHAT SHOULD YOU DO? slowly drive forward with the trailer brakes locked
27. WHEN COUPLING IS COMPLETE, HOW MUCH SPACE SHOULD THERE BE BETWEEN THE UPPER AND LOWER FIFTH WHEEL? no space

6

When you get ready to back under the semi trailer you should line up?

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

Where should the tractor be when you inspect the landing gear?

Tractor protection valve to close. to inspect the landing gear. The tractor should be positioned: With the tractor frame under the trailer.

When the trailer is lying flat on the fifth wheel how much gap space is acceptable?

b. No gap is permissible between the trailer upper coupler plate and the fifth wheel. (6.35 mm) or less gap visible between the lock jaws.

What should a tractor inspection begin with?

Identify any general vehicle damage or deterioration. Check mirrors and windows are free of cracks or damage and are properly secured. Ensure lamps and reflectors are undamaged and functioning properly. Inspect suspension system for air leaks, missing or broken fasteners or spring leaf.

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When backing a tractor under a trailer you should?

CDL

Question Answer
When backing a tractor under a trailer you should ___________. Always use the lowest reverse gear.
After the trailer has been coupled to the tractor, the tractor protection control valve should be placed in what posistion? Normal position.

37

What will happen if the airlines are crossed when you hook up to an old trailer?

a. What will happen if the air lines are crossed when you hook up to an old trailer? a. The hand valve will apply the tractor brakes instead of the trailer brakes. If the trailer has no spring brakes, you could drive away but you would not have trailer brakes.

What does coupling mean?

1: the act of bringing or coming together: pairing specifically: sexual union. 2: a device that serves to connect the ends of adjacent parts or objects. 3: the joining of or the part of the body that joins the hindquarters to the forequarters of a quadruped.

How can I make sure my trailer height is correct before coupling?

How do you check to make sure trailer height is correct before coupling? It must be slightly lower than the center of the fifth wheel, so trailer is raised slightly when dolly is pushed under.

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