CMBNTN Quiz

A driver can do two things to prevent a rollover. One is keep the cargo close to the ground. What is the second?

• Use the hand valve.

• Keep heavy boxes on top of light boxes.

• Make turns slowly and gently.

What type of combination vehicles will roll over the easiest?

• California truck with full-load trailer.

• Triple 27 trailers.

• A B-train type of trailers.

Which of these statements about stopping a commercial vehicle is correct?

• Bob-tail tractors can take longer to stop than loaded vehicles.

• Bob-tail tractors will stop sooner, because there is no trailer.

• Empty trucks stop in the shortest amount of distance.

When is a trailer most likely to jack-knife?

• When it is empty.

• When it is overloaded.

• When the load is close to the ground.

What is the best way to find out if the trailer is skidding?

• By pulling down on the hand valve.

• When you have to use controlled braking.

• By looking in your mirrors.

What should you do if the trailer tires are skidding?

• Pull down the hand valve.

• Take your foot off of the service brake.

• Pull out the air supply valve.

What should you do when turning and cannot complete the turn without going into the other traffic lane?

• Stop and back up.

• Go hard left, then hard right.

• Turn wide as you complete the turn.

When should you use the hand valve during normal driving conditions?

• Only on down grades.

• Always, save your tractor brakes.

• Never.

When should you use the hand valve when parking a combination vehicle?

• Only on a down grade.

• Never.

• Only when the brakes are hot.

How do you supply air to the trailer air tanks?

• Pulling down on the application supply valve.

• Pulling out the air supply valve.

• Pushing in the air supply valve.