Test 1 Combination Flashcards
2) why should you be sure that the gift wheel plate is greased as required?
To prevent steering problems
1) glad hands are use for connecting the:
Service and emergency air lines from the truck to the trailer
3) after connecting the air line but before backing under the trailer, you should:
Supply air to the trailer system, then pull out the air supply knob
4) the trailer air supply control (also called the tractor protection valve control) should automatically close when the air pressure falls to between_psi.
20 and 45
5) when coupling, the proper position of the fifth wheel is:
Titled down towards the end of the tractor
6) which part of the kingpin should the locking jaws close around?
The shank
7) a trailer is most likely to jackknife when it is_
Empty
8) if the spring brakes don’t release when you push the trailer air supply control, you should:
Check the air line connections
9) the best way to tell if your trailer had started to skid is to:
See it in your mirror
10) to unlock the fifth wheel, pull the release handle to the_position.
Open
11) when should you use the hand valve to park a combination vehicle?
Never
12) a driver crosses the air lines when hooking up to an old trailer. What will happen?
If the trailer has no spring brakes, he or she could drive away but wouldn’t have trailer brakes
13) you supply air to the trailer tanks by:
Pushing in the trailer air supply valve
14) the front trailer supports are up and the trailer is resting on the tractor. Make sure:
There is enough clearance between the tractor frame and the landing gear
15) he safety catch for the fifth wheel locking lever must be_for a coupling to the complete.
Over the locking level
