Alabama CDL — General Knowledge: Signals & Pavement Markings Practice Test

Question 1

A cross-buck sign at a railroad crossing tells drivers to:

Accepted Answer

Yield the right of way to any approaching train — The cross-buck marks the crossing and requires drivers to yield to trains; extra signs show the number of tracks.

Answer

Proceed without slowing

Answer

Ignore the crossing if no gate is present

Answer

Come to a complete stop every time

Question 2

On a trailer, a steady yellow ABS lamp on the left rear indicates:

Accepted Answer

The trailer's antilock braking system is not working properly — For trailers, a yellow ABS malfunction lamp on the left rear that stays on shows the antilock system needs attention.

Answer

The turn signal is on

Answer

The load is unbalanced

Answer

The trailer brakes are fully released

Question 3

During the walk-around, front turn signal lights should be:

Accepted Answer

Clean, working, and amber or white — Turn signal lamps facing forward must work and be amber or white; you clean and check them during inspection.

Answer

Blue for night visibility

Answer

Any color as long as they light

Answer

Red at the front

Question 4

If your ABS malfunction lamp stays lit after startup, it means:

Accepted Answer

The antilock braking system is not working properly — The ABS indicator should light briefly and go out; if it stays on, the antilock system has a fault to be serviced.

Answer

The headlights are on

Answer

The air pressure is too high

Answer

The parking brake is engaged

Question 5

Drivers behind you are warned that you are braking by the:

Accepted Answer

Stop lights, which come on when you apply the brakes — The stop light switch turns on your brake lights so following drivers know you are slowing.

Answer

Clearance lights

Answer

Turn signals only

Answer

Identification lights

Question 6

Signaling your intentions is important mainly because:

Accepted Answer

Other drivers cannot know what you plan to do until you tell them — Turn signals communicate your plan so other drivers can respond safely; they cannot read your mind.

Answer

It replaces checking your mirrors

Answer

It lets you turn without slowing

Answer

It is optional courtesy only

Question 7

Clearance and identification lights at the front of a vehicle should show which color?

Accepted Answer

Amber — Front clearance, identification, and marker lights must be amber; red is used at the rear.

Answer

Blue

Answer

Red

Answer

Green

Question 8

At a railroad crossing, flashing red lights and bells mean:

Accepted Answer

Stop; a train is approaching and you must yield to it — When the red lights start flashing, a train is coming; you must stop and yield the right of way.

Answer

Proceed because the signal is broken

Answer

Slow down but keep moving

Answer

The crossing is permanently closed

Signals & Pavement Markings

Study questions with answers

1. A cross-buck sign at a railroad crossing tells drivers to:

2. On a trailer, a steady yellow ABS lamp on the left rear indicates:

3. During the walk-around, front turn signal lights should be:

4. If your ABS malfunction lamp stays lit after startup, it means:

5. Drivers behind you are warned that you are braking by the:

6. Signaling your intentions is important mainly because:

7. Clearance and identification lights at the front of a vehicle should show which color?

8. At a railroad crossing, flashing red lights and bells mean:

More CDL — General Knowledge topics

Practice Signals & Pavement Markings in another state