Communication and Signaling - ONLINE CDL SCHOOL

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Communication and Signaling

Build confidence with 10 original questions about Communication and Signaling. Review your answers and explanations after finishing.

Supplemental study practice. This is not a government licensing exam or ELDT certification, and does not replace hands-on training. Follow your state’s current handbook.

1 / 10

If you see a hazard ahead that will require you to slow down, how should you warn drivers behind you?

Sound your horn

Wave your hand out the window

Flash your brake lights

Turn on your high beams

2 / 10

When parked at the side of the road at night, what should you do to warn other drivers?

Leave your headlights on high beam

Place a cone on the road

Turn on your four-way emergency flashers

Rely only on your taillights

3 / 10

When changing lanes in a commercial vehicle, what should you do to communicate your intentions?

Flash your high beams

Signal before changing lanes and do so slowly and smoothly

Change lanes quickly without signaling

Sound your horn before moving

4 / 10

What is the safest way to warn drivers behind you that you will be slowing down?

Wave your arm out the window

Sound your horn

Turn on your headlights

Tap your brake pedal lightly to flash your brake lights

5 / 10

Why should you not signal other drivers when it is safe to pass your vehicle?

You could cause an accident and be held responsible

It is required by law

It is only allowed at night

It is considered courteous but not required

6 / 10

When should you cancel your turn signal after making a turn in a commercial vehicle?

As soon as the turn is completed

Halfway through the turn

After you have driven a block past the turn

Before you begin the turn

7 / 10

What is the best way to make yourself visible to other drivers during rain or snow?

Use only clearance lights

Use high beams at all times

Turn on your headlights (low beam)

Rely on daytime running lights

8 / 10

What should you do when passing a pedestrian or bicyclist to communicate your presence?

Tap your horn lightly if legal

Shout out the window

Rev your engine loudly

Flash your high beams continuously

9 / 10

If you must drive slowly and it is legal, how should you alert drivers behind you?

Wave your hand out the window

Sound your horn repeatedly

Drive with your high beams on

Turn on your emergency flashers

10 / 10

When is it appropriate to use your four-way emergency flashers?

When driving very slowly or stopped on the road

When passing another vehicle

When changing lanes

When making a left turn

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