Arizona CDL Permit Test - Knowledge Test Class B

In heavy traffic, it is safest to travel at the same speed as other vehicles. If two vehicles continue to drive in the same direction at the same speed, they cannot hit each other.

Compressed air usually contains a certain amount of moisture and compressor oil, which can build up in the air storage tanks and damage the brake system. The tanks should be drained to clean out these accumulations. On a tank with a manual drain valve, draining should be performed at the end of each day of driving.

To avoid becoming fatigued on a long trip, you should take a break after every 100 miles or two hours of driving. Driving through the night, or during any other time when you would normally be asleep, raises the danger of fatigue.

Bridges tend to freeze before other parts of the road surface. You should be especially careful on bridges when temperatures are near the freezing point.

A driver is responsible for four things related to transporting cargo. They are responsible for inspecting the cargo, recognizing overloads and poorly balanced weight, ensuring that the cargo is secured without obstructing their view, and ensuring that the cargo is not obstructing access to emergency equipment.

If you have an Anti-Lock Braking System (ABS) equipped on only the tractor, only the trailer, or only one axle, you will still have more control over the vehicle when braking than you would without ABS. You should brake normally.

Lane changes should always be executed slowly and smoothly. This will result in safer handling of your vehicle while allowing time for other drivers to react to your movements.