Contents
- 1 Where should the tractor be when you inspect the landing gear?
- 2 What gear do you raise the landing gear after being coupled with the tractor?
- 3 How should you test the tractor semi trailer connection for security?
- 4 How should you align your tractor to a trailer when preparing to couple?
- 5 What will happen if the air lines are crossed when you hook up to an old trailer?
- 6 Where should the tractor be when you inspect landing gear after uncoupling trailer?
- 7 What happens when you cross the air lines of an older trailer without spring brakes?
- 8 What part of the kingpin should the locking jaws?
- 9 Why should you lock the tractor glad hands to each other when you are not towing a trailer?
- 10 What should you do to stop a trailer skid?
- 11 When connecting the glad hands press the two seals?
- 12 When backing up your tractor while coupling it to a trailer the trailer brakes should be?
- 13 What happens if the trailer is too high when you try to couple?
- 14 When the trailer is lying flat on the fifth wheel how much gap space is acceptable?
- 15 How can I make sure my trailer height is correct before coupling?
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.
What gear do you raise the landing gear after being coupled with the tractor?
CDL
| Question | Answer |
|---|---|
| After you have coupled the trailer you should have to raise the landing gear by using: | Low gear. |
| You supply air to the trailer tanks by: | Pushing in the trailer air supply valve. |
| Which part of the kingpin should the locking jaws close first? | The shank. |
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How should you test the tractor semi trailer connection for security?
How should you test the tractor semi trailer connection for security? A Pull gently forward in low gear against the locked trailer brakes, then look at it carefully. B Put the tractor in gear and pull ahead with a sharp jerk. C Rock the trailer back and forth with the trailer brakes locked.
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.
What will happen if the air lines 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.
Where should the tractor be when you inspect landing gear after uncoupling trailer?
There is enough clearance between the tractor frame and the landing gear. When you are uncoupling a loaded trailer you should lower the landing gear until it: Make firm contact with the ground, then crackle hits a low gear a few extra turns.
What happens when you cross the air lines of an older trailer without spring brakes?
You cross the air lines when hooking up to an old trailer. What will happen? If the trailer has no spring brakes, you could drive away buy you wouldn’t have trailer brakes. In normal driving, some drivers use the trolley (hand) valve before the brake pedal in order to prevent trailer skids.
What part of the kingpin should the locking jaws?
Which part of the kingpin should the locking jaws close around? When you get ready to back under the semi trailer you should line up: Directly in front of the trailer. How should you test the tractor semi trailer connection for security?
Why should you lock the tractor glad hands to each other when you are not towing a trailer?
Why should you lock the tractor glad hands (or dummy couplers) to each other when you are not towing a trailer? A The connected brake circuit becomes a back up air tank. B If you did not, you could never build system pressure.
What should you do to stop a trailer skid?
What is the first thing you should do to prevent a trailer skid? Step on the brakes hard several times to stop the skid. Recognize that a skid has started to occur in the mirrors. Use the trailer hand brake.
When connecting the glad hands press the two seals?
When connecting the glad hands, press the two seals together with the couplers at a 90 degree angle to each other. A turn of the glad hand attached to the hose will join and lock the couplers. If you do cross the air lines, supply air will be sent to the service line instead of going to charge the trailer air tanks.
When backing up your tractor while coupling it to a trailer the trailer brakes should be?
Before backing your tractor under the trailer while coupling, make sure your trailer brakes are locked.
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.
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.
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.