Oregon CDL Permit Test - Tank

Sudden stops can produce dangerous surge in a tank carrying liquid cargo. To reduce the need for sudden stops, drivers of tanks should increase their following distance so they can begin braking well in advance of stops.

If you are experiencing a truck fire, you should not attempt to open trailer doors without first feeling the doors to see if they are hot. If the doors are hot, there may be a cargo fire. Leave the doors closed if there is a cargo fire.

Without a working Anti-Lock Braking System (ABS), your vehicle will still have normal brake function. Continue to drive and brake as you normally would and have your ABS serviced as soon as possible.

There may be a delay of a few seconds between the sound of a tire failing and the time that the vehicle is affected by the tire failure. Because of the short delay, a driver may initially believe that the sound came from another vehicle.

When approaching your vehicle to conduct an inspection, you should look underneath it to make sure there are no fresh oil, coolant, grease, or fuel leaks on the ground. Leaks can indicate unsafe defects on a vehicle.

The use of cargo heaters is not always permitted. When transporting materials that are categorized as Class 1 (Explosives), Class 2.1 (Flammable Gas), or Class 3 (Flammable Liquids) materials, heaters are generally prohibited.

Most heavy vehicles with unsynchronized manual transmissions require double clutching to change gears.