Q.1
The trailer hand valve:
Q.2
The trailer hand valve should not be used while you are driving because:
Q.3
If you cannot reverse your trailer in a straight path, you should:
Q.4
When backing up your tractor while coupling it to a trailer, the trailer brakes should be:
Q.5
After completing a pre-trip inspection, you should ensure that the:
Q.6
What is a bobtail tractor?
Q.7
When glad hands are coupled, the seals should be pressed together at a ____ angle.
Q.8
The emergency air line supplies air to the:
Q.9
Place the trailer air supply control in its "emergency" position to test:
Q.10
The "crack-the-whip" effect can:
Q.11
Older trailers are not equipped with spring brakes. This means that if the air supply for a vehicle's air braking system leaks away:
Q.12
When testing ____, you should apply your vehicle's brakes with the hand control while moving the vehicle forward slowly.
Q.13
Having anti-lock brakes on only one axle:
Q.14
Bobtail tractors are ____ to stop than tractors attached to full semitrailers.
Q.15
If you must cross traffic while driving a combination vehicle, you should:
Q.16
If a trailer begins to jackknife, the driver:
Q.17
A trailer that is too high:
Q.18
The trailer hand valve should be used:
Q.19
If the emergency air line loses pressure:
Q.20
Keeping cargo centered on a rig can:
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