Q.1
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.2
When braking while pulling a trailer equipped with anti-lock brakes, you should:
Q.3
The service air line is often controlled by the foot brake and is attached to the ____ valves.
Q.4
In an empty combination vehicle, the stiff suspension springs and strong brakes will have:
Q.5
When coupling, after you've connected the air lines to the trailer, you should:
Q.6
Fully-loaded rigs:
Q.7
Operating combination vehicles usually requires ­­­­­____ operating single vehicles.
Q.8
What is a bobtail tractor?
Q.9
A driver should test the tractor protection valve by:
Q.10
If a parked trailer does not have spring brakes, you should keep the trailer from moving by:
Q.11
When backing up your tractor while coupling it to a trailer, the trailer brakes should be:
Q.12
When a vehicle goes around a corner, the rear wheels:
Q.13
In a vehicle equipped with an automatic tractor protection valve, the valve will pop out when air pressure drops to a level between:
Q.14
If you cannot reverse your trailer in a straight path, you should:
Q.15
To find out if a vehicle that was built before 1998 has an Anti-Lock Braking System (ABS), you can:
Q.16
All trailers made after ____ must be equipped with Anti-Lock Braking Systems (ABS).
Q.17
When you are pulling a trailer, the air supply control lever should be in its ____ position.
Q.18
When driving while pulling trailers, you should:
Q.19
Place the trailer air supply control in its "emergency" position to test:
Q.20
If you press the tractor air supply control and your trailer's spring brakes do not release, you should:
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