Pennsylvania CDL Permit Test - Tank

While driving, you should continually scan the road to spot potential hazards in advance. Make emergency plans for how to deal with the hazards if they become dangerous.

Driving while fatigued is dangerous. Warning signs of fatigue include difficulty focusing; repeated yawning or rubbing of the eyes; daydreaming or wandering thoughts; and drifting out of your lane.

Because liquids expand when their temperatures increase, some space must be left in a tank to accommodate the expansion. This space is referred to as "outage." The amount of required outage is different for different liquids.

Air expands as it gets warmer, so the air pressure in your tires could reach dangerously high levels while being used in very hot weather. If this happens, stop and let your tires cool. Do not let air out of the tires, as this could result in the pressure dropping to an unsafe level once the tires cool down.

If the words "Inhalation Hazard" appear on a package or its shipping paper, the "Poison Inhalation Hazard" or "Poison Gas" placards, as appropriate, must be displayed.

Rust around wheel nuts may mean that they are loose. Check the tightness of the nuts if you see any rust in the area.

You must have a commercial driver license with a hazardous materials endorsement before driving a vehicle of any size that is used to transport hazardous materials, even if the vehicle is not transporting hazardous materials at the time of operation.