Our printable Connecticut CDL Doubles/ Triples Trailers worksheet will help you get 100% ready for your coming exam

When driving, you should regularly check your mirrors, both to be aware of traffic and to check for problems on your own vehicle.

Checked only if there is a reason to suspect a problem

Air tanks usually hold enough compressed air: ___________.

The air storage tanks of an air braking system can normally hold enough compressed air for the brakes to be deployed multiple times.

For one stop before needing to be refilled

For several stops before needing to be refilled

Which of these is FALSE about coupling and uncoupling different trailer combinations?

Different trailer combinations can be coupled and uncoupled in various ways. Always follow the manufacturer's or owner's instructions while coupling or uncoupling vehicles.

There is only one way to couple and uncouple different trailer combinations.

One should couple and uncouple different trailer combinations according to the manufacturer or owner’s directions.

Uncoupling tractor trailers can be dangerous if not done correctly.

There are several ways to couple and uncouple tractor trailers.

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

Both the service and emergency air lines have cut off valves on trailers used as doubles and triples.

A “crack-the-whip” effect makes double/triple trailers more likely to turn over than other combination vehicles. Which of the following vehicle components is the most likely to turn over?

Because the "crack-the-whip" effect creates amplification toward the back of the rig, the front of the truck or both the vehicle and trailer are not the greatest options. While the back trailer of a double can have this effect, the triple is far more likely and the best option.

To uncouple double trailers , you should park your rig :

When uncoupling double trailers, park in a straight line on firm, level ground and activate the parking brakes to keep the vehicle from moving.

All trailers made after ____ must be equipped with Anti-Lock Braking Systems (ABS)

Anti-Lock Braking Systems are required on all trailers and converter dollies manufactured after March 1, 1998. (ABS).

Rearward amplification in triples means that ____.

The crack-the-whip effect is caused by rearward amplification, which amplifies the rollover force on each trailer.

the very rear trailer or tank has 3.5 times more rollover force

the very rear trailer or tank has 4 times more force in a rollover

the very rear trailer or tank has 3 times more force in a rollover

the very rear trailer or tank has 5 times more force in a rollover

Which of these has a higher risk of a rollover in a curve that has a posted speed limit?

The weight of the double trailers generates more momentum than a single trailer pulled by a straight truck or tractor.

a tractor pulling an empty 48-foot trailer

Failing to drain the tanks in an air brake system can result in?

In an air brake system, the air storage tanks must be drained to remove accumulated water and compressor oil. Failing to do this can cause damage. For example, water that has built up in the system could freeze in cold weather and cause brake failure.

According to suggested guidelines for driving double and triple rigs, space should be left between your rig and the vehicle in front of you. If you are driving a 300-foot-long vehicle at 35 miles per hour, which of these is the suggested minimum amount of space (in seconds) you should leave between yourself and the vehicle in front of you?

Allow one second for every ten feet of truck length if you're travelling less than 40 miles per hour. The minimum should be 30 seconds because a 300-foot-long truck has 30 lengths of 10 feet. The remaining options are incorrect. Because road conditions and traffic flow should be addressed rather than just following a formula, since safety is a top priority.

You want to hook your combination to a second trailer that has no spring brakes. What should you do in order to do this without wheel chocks?

If the second trailer doesn't have spring brakes,
drive the tractor close to the trailer, connect the
emergency line, charge the trailer air tank, and
disconnect the emergency line. This will set the
trailer emergency brakes (if the slack adjusters are
correctly adjusted). Chock the wheels if you have
any doubt about the brakes. [Commercial
Driver License
Manual]

make sure the trailer will roll freely when coupling.

supply air to the trailer air system with the tractor and then disconnect the emergency line.

hook the trailer electric cord to a portable generator for braking power.

When a vehicle is started, warning lights and buzzers

After an engine is started, the warning lights and buzzers for oil, coolant, charging circuits, and the Anti-Lock Braking System (ABS) should go out right away.

Which of these is true when driving double/triple trailers in slippery conditions?

Normal trucks are shorter than doubles and triples. They have more dead axles to pull as a result, which increases the risk of traction loss, skidding, and jackknifing.

They are shorter in length when compared to other commercial vehicles so are less likely to lose control.

There is less of a chance for loss of traction because they have more wheels.

They have more dead axles to pull, which can cause loss of traction.

The official CDL manual's section on double and triple trailers usually describes how to couple and uncouple _________.

The section on double and triple trailers in the official CDL manual normally explains how to couple and uncouple the most frequent forms of double and triple combinations. There are, however, different ways to connect and disconnect the various truck-trailer and tractor-trailer combinations in use. Consult the manufacturer's or owner's requirements to understand how to couple and uncouple the vehicles you'll be driving.

only doubles; look elsewhere to find out how to do triples.

only the more common types of combinations.

To test the tractor protection valve, charge the trailer air brake system, turn off the engine, and<code>_____</code>

Charge the trailer air brake system, turn off the engine, then drop the air pressure by stepping on and off the brake pedal multiple times to test the tractor protection valve. When the air pressure falls into the manufacturer's specified range (usually 20–45 psi), the tractor protection valve control (also known as the trailer air supply control) should pop out (or go from the "normal" to the "emergency" position).

step on and off the brake pedal several times.

flash your high-beam headlights on and off several times.

Mirror adjustment can only be checked properly if _____________________.

Mirror adjustment on a vehicle with one or more trailers can only be examined accurately if the trailers are straight. Every trip should begin with a check of the mirror adjustment.

Which of these is false about managing space when driving double/triple trailers?

If a double or triple trailer is rapidly turned or halted, it will rollover or jacknife. This is the case Because they are larger and longer than other commercial trucks.

They do not need more space when turning or stopping.

Clear side lanes are needed before changing lanes.

Free printable Connecticut CDL Doubles/ Triples Trailers worksheet part 4

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Free printable Connecticut CDL Doubles/ Triples Trailers worksheet part 4

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