Q.1
The trailer hand valve should be used:
Q.2
If a parked trailer does not have spring brakes, you should keep the trailer from moving by:
Q.3
A combination vehicle has:
Q.4
Combination vehicles need extra space on the road because they:
Q.5
What can the “crack-the-whip” effect do?
Q.6
Rollovers happen when:
Q.7
What does the trailer air supply control look like?
Q.8
Large combination vehicles take the longest amount of time to stop:
Q.9
During a trip, the ____ should be open.
Q.10
The "crack-the-whip" effect can:
Q.11
Look into the back of the fifth wheel:
Q.12
How much space should be between the upper and lower fifth wheel?
Q.13
Combination vehicles:
Q.14
What does the tractor protection valve do?
Q.15
The trailer hand valve should be used:
Q.16
If the emergency air line loses pressure:
Q.17
If color-coded, which color is used to identify emergency, or supply, lines?
Q.18
When backing up your tractor while coupling it to a trailer, the trailer brakes should be:
Q.19
If you press the tractor air supply control and your trailer's spring brakes do not release, you should:
Q.20
If a trailer begins to jackknife, you should not:
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