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UPGRADE TO CDL PREMIUM
1.
Emergency brakes are:
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required on all vehicles.
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not required on doubles.
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not required on buses.
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2.
If you hear a loud loud "bang" and the steering feels "heavy", you should:
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hold the steering wheel firmly and stay off the brake.
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pump the brakes until the vehicle has slowed down.
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brake hard and pull off the road.
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3.
On front tires, tread should be at least:
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4/16 inch
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4/32 inch
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2/32 inch
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4.
To know how much space you should keep in front of you:
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estimate how many seconds it would take you to reach the vehicle ahead.
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wait until the vehicle ahead of you passes a clear landmark, then count off the seconds until you reach the same spot.
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estimate how many vehicle lengths there are between you and the vehicle ahead.
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5.
In your mirror, you see a car approaching from the rear. The next time you check your mirror, you don't see the car. If you wish to change lanes, you should:
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ease into the other lane slowly so the other car can get out of the way.
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assume the car left the roadway and change lanes as normal.
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wait until you are sure the car isn't in your blind spot.
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6.
If your vehicle has air brakes, to check that air flows to all trailers:
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go to the rear of the second trailer and open the emergency line shut-off.
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pull gently on the trailer with the tractor.
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watch each trailer’s air gauge for a drop of 25 psi.
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7.
To prevent rollover, you should:
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put the lightest parts of the cargo under the heaviest parts.
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keep the cargo as close to the ground as possible.
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place the cargo near the rear of the trailer.
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8.
Weight that is loaded so there is a high center of gravity:
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reduces the chance that the load will shift to the side or fall off.
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makes a vehicle easier to handle.
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causes greater chance of rollover.
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9.
You can release dolly brakes:
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by closing the emergency line valve.
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by opening the service line valve.
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by opening the air tank petcock.
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10.
When driving in extremely hot weather, if the air pressure in the tires is too high, you should:
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let air out of the tires to decrease pressure.
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continue driving.
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stop and remain stopped until the tires cool off.
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