Florida CDL — General Knowledge: Road Signs Practice Test

Question 1

A railroad crossing is posted with a sign reading 'Exempt.' For a driver who would normally have to stop at every crossing, this means:

Accepted Answer

No full stop is required, but you still slow down and check the tracks carefully — Crossings signed as exempt or abandoned, streetcar crossings, a green traffic signal, and an officer or flagman directing traffic all remove the mandatory stop. Reduced speed and a careful look down the rails are still expected.

Answer

The crossing may be taken at normal highway speed

Answer

Only empty vehicles are allowed to use the crossing

Answer

You must stop twice, once for each direction of track

Question 2

A sign posting a clearance such as '12 FT 6 IN' at an underpass means a driver should:

Accepted Answer

Make sure the vehicle's height is under that clearance before proceeding — That number is the overhead clearance. If your loaded vehicle is taller than the posted height, you must not drive under it — find another route to avoid striking the structure.

Answer

Drive through only if the load is heavy

Answer

Ignore it unless carrying hazardous materials

Question 3

A round yellow sign with a black 'X' and the letters 'RR' means:

Accepted Answer

A railroad crossing is ahead, so slow down and be ready to stop — The round yellow sign with the black 'X' and 'RR' is the advance warning for a railroad crossing. It tells you to slow down, look, listen, and be prepared to stop for a train.

Answer

A rest area is ahead

Answer

The road ahead is closed to trucks

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A sharp right turn is required

Question 4

A crossbuck sign stands at the entrance to a railroad grade crossing. What does it require of you?

Accepted Answer

You must give up the right-of-way to any train using the crossing — The crossbuck marks the grade crossing itself and works like a yield sign for trains. A train always has priority, so let it pass before you move onto the rails.

Answer

You may cross first if your vehicle is already rolling

Answer

It applies only to vehicles that are carrying passengers

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It marks a crossing that has been closed to traffic

Question 5

A black-and-yellow warning sign showing a truck on a downhill grade tells a commercial driver to:

Accepted Answer

Prepare for a steep downgrade by selecting a low gear and safe speed — A steep-downgrade warning sign means a long or steep hill is ahead. Choose a safe low gear and speed before you start down so the engine can do most of the braking.

Answer

Speed up to build momentum for the next hill

Answer

Stop and set the parking brake at the sign

Question 6

A speed limit sign is posted on the curved ramp leading off a freeway. Why should a loaded truck often travel slower than that number?

Accepted Answer

The posted figure is chosen with cars in mind and can be unsafe for a tall, heavily loaded vehicle — Exits and entrances are among the more dangerous places for large vehicles, especially where a ramp turns and drops at the same time. Get the speed down before you reach the curved part.

Answer

Ramp signs may be ignored whenever traffic is light

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The number refers to the speed at the bottom of the ramp

Answer

Ramp signs are aimed at motorcycles

Question 7

On a long mountain downgrade you pass a sign posting a maximum safe speed. How should you treat that figure?

Accepted Answer

As a limit you must never go above on that grade — A posted safe speed on a grade is a ceiling, not a target to reach. Signs that give the length and the steepness of the hill deserve the same attention while you plan the descent.

Answer

As a suggestion that applies only to empty vehicles

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As the speed to hold once the brakes start to fade

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As the minimum speed needed to clear the grade

Question 8

Placards fixed to the outside of a commercial vehicle are there to do what?

Accepted Answer

Identify the hazard class of the cargo being carried — Placards are warning signs on the vehicle so that anyone nearby, including firefighters and police, can tell what class of dangerous cargo is aboard. A placarded load carries four matching signs: one ahead, one behind and one on each side.

Answer

Show the total weight of the load

Answer

List the carrier's operating authority number

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Mark which doors may be opened at a loading dock

Question 9

A small sign mounted beneath a crossbuck at a highway-rail crossing carries the numeral 2. What is it telling you?

Accepted Answer

There are two sets of tracks to get across — A plate under the crossbuck states how many sets of rails the crossing carries. Knowing that more than one set is there reminds you that a second train can be hidden behind the first.

Answer

Two warning bells are installed at this crossing

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Trains pass through here roughly twice an hour

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Only vehicles with two axles may use the crossing

Question 10

Which emblem on the back of farm machinery or a similar vehicle warns you that it cannot keep up with traffic?

Accepted Answer

A red triangle with an orange middle — Tractors, mopeds and construction equipment often display this triangular badge. Picking it out early gives you the distance a heavy vehicle needs to slow down safely.

Answer

A blue square with a white border

Answer

A green circle holding a black arrow

Answer

A white diamond crossed by a red stripe

Florida CDL — General Knowledge: Road Signs practice test

Study questions with answers

1. A railroad crossing is posted with a sign reading 'Exempt.' For a driver who would normally have to stop at every crossing, this means:

2. A sign posting a clearance such as '12 FT 6 IN' at an underpass means a driver should:

3. A round yellow sign with a black 'X' and the letters 'RR' means:

4. A crossbuck sign stands at the entrance to a railroad grade crossing. What does it require of you?

5. A black-and-yellow warning sign showing a truck on a downhill grade tells a commercial driver to:

6. A speed limit sign is posted on the curved ramp leading off a freeway. Why should a loaded truck often travel slower than that number?

7. On a long mountain downgrade you pass a sign posting a maximum safe speed. How should you treat that figure?

8. Placards fixed to the outside of a commercial vehicle are there to do what?

9. A small sign mounted beneath a crossbuck at a highway-rail crossing carries the numeral 2. What is it telling you?

10. Which emblem on the back of farm machinery or a similar vehicle warns you that it cannot keep up with traffic?

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