CDL Combination
Vehicles Test

You should have the fifth wheel plate greased as recommened because:

Why should you use chocks when parking a trailer without spring brakes?

Select the definition of "off-tracking."

Select the true statement in regards to what the fifth wheel should be checked for.

Select the accurate statement in regards to rolling up the landing gear to complete the coupling process.

You should back up slowly until____when coupling the trailer.

Select the true statement:

Select why you should not use the trailer hand valve while driving:

Select the true statement in regards to as why you should make sure the fifth wheel plate is greased as recommended:

Off-tracking happens when going around a corner and:

A trailer is at the right height to have the tractor backed up to it when:

Select the false statement about tractor protection valves.

It is good practice to_____when uncoupling.

Remember to_____to prevent rollovers.

The purpose for the emergency air line is:

Select the corect setup for shut-off valves:

What position should the tractor protection control valve be in after coupling?

Select the situation in which you should use the hand valve to park a combination vehicle.

Select the load of the trailer that will require the shorter distance to stop.

How should the hand valve be used?

What will occur if you cross the connect the air lines?

Which trailer is most likely to turn over when you make a sudden turn while pulling doubles?

The cause of almost half of all truck driver deaths are:

Make sure____when the front trailer supports are up and the trailer is sitting on the tractor.

The locking jaws of the kingpin should close around:

Select the vehicle that off-tracks the most.

Check to ensure that____when inspecting the coupling.

What will happen should a driver cross the air lines when hooking up the an older trailer?

What is the service air line controlled by?

Select the true statement in regards to if a glad hand on the blue air line is missing a seal.

Select the statement that best explains the "crack-the-whip" effect.

You must first______to supply air to the trailer.

Select the true statement:

After coupling with a trailer, what position should the front trailer supports be in before driving away?

There should be ___space between the upper and lower fifth wheel after coupling.

You should follow behind other vehicles ______when traveling under 40 mph.

The emergency air line is used to:

If you park the trailer at an angle to the tractor when uncoupling:

Where should the safety catch for the fifth wheel locking lever be located for coupling to be complete?

You should make sure the_____before backing under a trailer.