CDL Double-Triple
Trailers Test

When would a drive-wheel skid result in a jackknife when pulling doubles?

Double and triple trailers should be driven with care to avoid a rollover or jacknife.

Select the action that is not appropriate when driving on slippery roads:

What is the best way to stop all skids?

What is most likely to occur when driving a set of doubles and a set of trailer wheels goes into a skid?

Where are shut off valves located on trailers that are doubles or triples?

What should you hear when you test the trailer brakes by opening the service air line at rear of trailer with the hand valve on?

For emergency braking when driving a double trailer and having to use your brakes to avoid a collision is to:

Your rig should be parked on__to uncouple double trailers.

Select the true statement about double or triple trailers.

Which trailer is most likely to tip over due to the crack the whip effect?

The trailer height is correct for connecting a converter dolly to a second or third trailer when:

Why should you test the tractor protection valve?

How do you hook a combination to a second trailer without spring brakes and without using wheel chocks?

Select the true statement about converter dollies:

What will probably happen if the converter dolly is still under the second trailer and the pintle hook is unhooked?

You should_____to uncouple the converter dolly.

What is most likely to occur when driving double and a set of trailer wheels goes into a skid?

What is the minimum amount of distance you should maintain when driving at 50 mph in ideal conditions with a 100 ft twin trailer combination?

How do you check the air flow to the last trailer?

Select the true statement in regards to handing triples and doubles

You should keep a minimum of ____between another vehicle and the double trailer with 100 ft truck driving at 30 mph.

Select the true statement in regards to quick steering movements and double trailers:

Select the statement that is true in regards to what is required of a driver with a double or triple trailers:

The main reason you should pull the dolly out from under a trailer before disconnecting it from the trailer in front is:

Why is it dangerous to unlock the pintle hook with the dolly still under the rear trailer?

The pintle hook should be_____ and the converter dolly air tank drain valve is___when doing a walk around inspection of a triple or double trailer.

When driving with multiple trailers, which one should be right behind the tractor?

What do yo uneed to do before supplying air to the air tanks of the second trailer?

Select the statement that is true in regards to quick steering movements and triple/double trailers:

How should the shut off valves at the rear of the trailer be when inspecting doubles?

Which trailer should be the first one after the tractor?

Select the true statement about seeing ahead.

Do converter dollies have spring brakes?

The correct trailer height when coupling the rear trailer is:

Select the true statement in regards to converter dollies:

Select the true statement in regards to empty trucks:

In what position should the converter dolly air tank drain valves and pintle hook be in?

How do you make sure the trailer height is correct before coupling?

Select the statement that is true in regards to managing space to the sides.