FREE CDL TEST PRACTICE

When driving with more than one trailer, which trailer should be the first one behind the tractor?

You are driving a 100 foot twin trailer combination at 50 mph. The road is dry and the visibility is good. You should keep at least ____ seconds of space ahead of you.

With the hand valve on, you should test the trailer brakes by opening the service line valve at the rear of the rig. When you do this, you should hear:

You are driving with double trailers and must use your brakes to avoid a crash. For emergency braking you should:

Converter dollies:

The “crack the whip effect” causes GREAT trouble for trucks with trailers. Which is most likely to tip over:

You are doing a walk around inspection of a double or triple trailer rig. You should be sure the converter dolly air tank drain valves are ____ and the pintle hook is ____.

When does the “Driver’s Manual” advise disconnecting the steering axle brakes to help keep the rig straight?

If a converter dolly is still under the second trailer and you unlock the pintle hook, what will probably happen?

You are visually checking the coupling of a converter dolly to the rear trailer. How much space should be between the upper and lower fifth wheel?

Which of these statements about quick steering movements and doubles/triples is true?

Empty trucks:

You are driving a 100 foot truck with double trailers at 30 mph. The road is dry. Visibility is good. You should keep at least ____ seconds of space ahead of you:

If you want to couple a second trailer to your combination vehicle, secure it by using:

The best way to stop all skids is to:

Driving a truck with double or triple trailers requires a driver to:

The best way to keep brakes from overheating while going down a steep grade is to:

If you must drive through deep puddles or flowing water, which of these should you not do?

Some large trucks have convex or “spot” mirrors. Convex mirrors:

Which of these statements about seeing ahead is true?

When should you check your mirrors while making a lane change?

Which of these statements about managing space to the sides is true?

Which of these statements about handling of doubles and triples is true?

How can you be sure you supplied air to a second trailer?

You should check the height of the trailer before connecting a converter dolly to a second or third trailer. The trailer height is right when:

You want to hook your combination to a second trailer that has no spring brakes. To do this without wheel chocks you should:

Which of these in not a good thing to do when driving on slippery roads?

Which of these will result in the best control on curves?

You are driving a set of doubles. A set of trailer wheels goes into a skid. Which of these is most likely to occur?

Before you can supply air to the air tanks of a second trailer you need to:

When a vehicle is carrying a load at night, which extends four feet or more beyond the rear of the body, there must be __ at the extreme end of the load.

How long does it take a typical tractor trailer to clear a single track? A double track?

When pulling triple trailers, always put the heaviest trailer in the:

When coupling twin trailers, you should release the dolly brakes by:

When connecting the converter dolly to the rear trailer, you should remember to:

To uncouple double trailers, you should park your rig:

When coupling the rear trailer, the correct trailer height is:

To uncouple the converter dolly you should: (In the proper order)

When inspecting doubles, the shut off valves at the rear of the trailer should be:

To check for air flow to the last trailer:

You should test your tractor protection valve to avoid:

To test the trailer service air brakes you should:

When pulling triple trailers, which trailer is most likely to rollover?

The stopping distance for a tractor trailer traveling 55 mph on dry pavement is:

A drive-wheel skid when pulling doubles could result in a jackknife when:

When coupling doubles, start by:

Inspect a converter dolly as if it were:

On trailers used as doubles and triples, you’ll find shut off valves (cut off cocks) in the:

Should you unhook the pintle hook with the converter dolly still under the trailer?

Dollies manufactured on or after March 1st 1998, are required to have a yellow lamp on the _____ side.