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Combination Vehicles Quiz
While driving behind another vehicle under good conditions, you should allow at least one second between your vehicle and the vehicle ahead for each __________ (how many) feet of your vehicle length?
(Required)
20
10
30
The air brake leakage rate for a combination vehicle (engine off, brakes off) should be less than __________ psi per minute.
(Required)
2
1/2
3
The higher the center of gravity of your truck, the:
(Required)
Easier to turn around the corner.
More stable while turning.
Easier to turn over.
There are two things that a driver can do to prevent a rollover. They are: (1) keep the cargos as close to the ground as possible; and (2):
(Required)
Make sure that the brakes are properly adjusted.
Keep both hands firmly on the steering wheel.
Go slow around turns.
If the service line comes apart while you are driving a combination vehicle but the emergency line stays together, what will happen right away?
(Required)
The emergency trailer brakes will come on.
The trailer's tank will exhaust through the open line.
Nothing is likely to happen until you try to apply the brakes.
The safest way to make a turn without entering another traffic lane is:
(Required)
You should turn wide before you start the turn.
You should not make a turn and move to another place where you can make a turn without crossing other lane.
You should turn wide as you complete the turn.
Where should the tractor be when you inspect landing gear after uncoupling the trailer?
(Required)
Completely cleared from the trailer.
With the tractor frame under the trailer.
With the fifth wheel directly beneath the kingpin.
Glad hands are usually connecting which of these?
(Required)
Kingpin from the trailer to the locking jaws of the fifth wheel.
Service and emergency air lines from the vehicle to the trailer.
Electric lines from the tractor to trailer.
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