New Mexico CDL — General Knowledge: Road Signs Practice Test

Question 1

Which hazard class on the manual's table uses ammonium nitrate and hydrogen peroxide as its examples?

Accepted Answer

Class 5, Oxidizers — The table lists Class 5 as Oxidizers and gives ammonium nitrate and hydrogen peroxide as examples.

Answer

Class 1, Explosives

Answer

Class 3, Flammable

Answer

Class 8, Corrosives

Question 2

As BAC builds, the manual lists several effects on driving. Which one involves traffic signs and signals?

Accepted Answer

Running stop signs and red lights — The listed effects of a rising BAC include straddling lanes, jerky starts, failing to signal or use lights, improper passing, and running stop signs and red lights.

Answer

Stopping well short of every stop line

Answer

Mistaking warning signs for speed limit signs

Answer

Signaling for turns that are never made

Question 3

You are about to load two different hazardous products on one truck and are not sure they can go together. What does the manual tell you to do?

Accepted Answer

Check with your employer and look up the regulations — Mixed loads are only allowed when you know the products are safe together; if you don't, the manual says to check with your employer and the regulations.

Answer

Load them at opposite ends of the trailer and go

Answer

Take the placards off until the load is delivered

Answer

Put the heavier product on the bottom

Question 4

Where the pavement drops off sharply at the road's edge, driving too close can lean your vehicle toward the roadside. What might the top of it strike?

Accepted Answer

Roadside objects such as signs and tree limbs — A drop-off can tilt a tall vehicle enough for its top to hit signs or tree limbs beside the road, and it also makes steering harder as you cross the edge.

Answer

The barrier in the center median

Answer

Vehicles in the oncoming lane

Answer

Traffic signals over the next intersection

Question 5

On the manual's hazard class table, how are fuel oils and lighter fluid listed?

Accepted Answer

As Combustible Liquids, with no class number — Fuel oils and lighter fluid appear under Combustible Liquids, one of the rows that carries no class number. Gasoline, by contrast, is a Class 3 example.

Answer

As Class 3, Flammable

Answer

As Class 2, Gases

Answer

As Class 9, Miscellaneous Hazardous Materials

Question 6

Even without a hazardous materials endorsement, what must every commercial driver be able to do about hazardous cargo?

Accepted Answer

Recognize it and know whether it can be hauled without the endorsement — Every driver needs some hazardous materials knowledge: how to recognize such cargo, and whether it may be hauled without a hazardous materials endorsement.

Answer

Repackage it when a container is damaged

Answer

Choose the placards for any shipment

Answer

Calculate the reportable quantity for each product

Question 7

Throughout the CDL on-road test, which of these must you do at all times?

Accepted Answer

Obey every traffic sign, signal and law — The road test section lists three constants: wear your safety belt, obey every traffic sign, signal and law, and finish with no accident or moving violation.

Answer

Keep the four-way flashers on

Answer

Stay 10 mph under every posted limit

Answer

Call out each sign before you reach it

Question 8

A driver ahead keeps looking at street signs, a map and house numbers. What does the manual say about such a driver?

Accepted Answer

The driver may be confused and may not notice your vehicle — Studying signs, maps or house numbers is one of the manual's clues to a confused driver, who may stop or change direction without warning.

Answer

The driver is probably impaired by alcohol

Answer

The driver is about to pull over to let you pass

Answer

The driver has seen you and will hold a steady speed

Question 9

Your cargo is identified as hazard Class 8. By the manual's hazard class table, what kind of material is it?

Accepted Answer

A corrosive, such as hydrochloric acid or battery fluid — Class 8 on the table is Corrosives, with hydrochloric acid and battery fluid as the examples.

Answer

A poison, such as a pesticide

Answer

A flammable solid, such as matches

Answer

A radioactive material, such as uranium

Question 10

Shippers use shipping papers and diamond-shaped hazard labels to communicate risk. Whom does the manual say these warn?

Accepted Answer

Dockworkers and drivers — The shipper's papers and diamond-shaped labels alert dockworkers and drivers to a product's risk.

Answer

Only emergency responders

Answer

The receiving customer's office staff

Answer

Motorists following the truck

Question 11

The manual gives three purposes for hazardous materials rules. Which of these is NOT one of them?

Accepted Answer

To limit how far hazardous cargo may travel — The intent of the rules is containment, communication of risk, and safe drivers and equipment. Distance limits are not part of that list.

Answer

To contain the product

Answer

To communicate the risk

Answer

To ensure safe drivers and equipment

Question 12

Which of these is NOT one of the examples the manual's hazard class table gives for Class 1, Explosives?

Accepted Answer

Matches — Ammunition, dynamite and fireworks are the Class 1 examples. Matches are listed with fuses under Class 4, Flammable Solids.

Answer

Ammunition

Answer

Dynamite

Answer

Fireworks

New Mexico CDL — General Knowledge: Road Signs practice test

Study questions with answers

1. Which hazard class on the manual's table uses ammonium nitrate and hydrogen peroxide as its examples?

2. As BAC builds, the manual lists several effects on driving. Which one involves traffic signs and signals?

3. You are about to load two different hazardous products on one truck and are not sure they can go together. What does the manual tell you to do?

4. Where the pavement drops off sharply at the road's edge, driving too close can lean your vehicle toward the roadside. What might the top of it strike?

5. On the manual's hazard class table, how are fuel oils and lighter fluid listed?

6. Even without a hazardous materials endorsement, what must every commercial driver be able to do about hazardous cargo?

7. Throughout the CDL on-road test, which of these must you do at all times?

8. A driver ahead keeps looking at street signs, a map and house numbers. What does the manual say about such a driver?

9. Your cargo is identified as hazard Class 8. By the manual's hazard class table, what kind of material is it?

10. Shippers use shipping papers and diamond-shaped hazard labels to communicate risk. Whom does the manual say these warn?

11. The manual gives three purposes for hazardous materials rules. Which of these is NOT one of them?

12. Which of these is NOT one of the examples the manual's hazard class table gives for Class 1, Explosives?

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