Where should the tractor be when you inspect landing gear after uncoupling the trailer?
With the tractor frame under the trailer. ✓ CORRECT
Completely cleared from the trailer.
With the fifth wheel directly beneath the kingpin.
2
While driving behind another vehicle under good condition you should allow at least one second between your vehicle and the vehicle ahead for each ____ (how many) feet of your vehicle length?
10 ✓ CORRECT
20
30
3
There are two things that a driver can do to prevent a rollover. They are: (1) keep the cargo as close to the ground as possible; and (2):
Make sure that the brakes are properly adjusted.
Keep both hands firmly on the steering wheel.
Go slow around turns. ✓ CORRECT
4
The air brake leakage rate for a combination vehicle (engine off, brakes off) should be less than ____ psi per minute.
1/2
2
3 ✓ CORRECT
5
The safest way to make turn without entering another traffic lane is:
You should turn wide before you start the turn.
You should turn wide as you complete the turn. ✓ CORRECT
You should not make a turn and move to another place where you can make a turn without crossing other lane.
6
The higher the center of gravity of your truck, the:
Easier to turn around the corner.
More stable while turning.
Easier to turn over. ✓ CORRECT
7
If the service line comes apart while you are driving a combination vehicle but the emergency line stays together, what will happen right away?
The trailer’s tank will exhaust through the open line.
The emergency trailer brakes will come on.
Nothing is likely to happen until you try to apply the brakes. ✓ CORRECT
8
Glad hands are usually connecting which of these?
Electric lines from the tractor to trailer.
Kingpin from the trailer to the locking jaws of the fifth wheel.
Service and emergency air lines from the vehicle to the trailer. ✓ CORRECT
9
A driver crosses the air lines when hooking up to an old trailer. What will happen?
The hand valve apply the tractor brakes instead of the trailer brakes.
If the trailer has no spring brakes, you could drive away but you wouldn’t have trailer brakes. ✓ CORRECT
The brake lights will come on when the brake pedal is pressed.
10
A driver crosses the air lines when hooking up to an old trailer. What will happen?
The hand valve apply the tractor brakes instead of the trailer brakes.
If the trailer has no spring brakes, you could drive away but you wouldn’t have trailer brakes. ✓ CORRECT
The brake lights will come on when the brake pedal is pressed.