Nevada CDL — General Knowledge: Road Signs Practice Test

Question 1

A compressed gas cylinder won't hold a diamond-shaped hazard label. How may the shipper show the hazard?

Accepted Answer

With a tag or decal securely attached — Shippers put diamond labels on most hazmat packages. When a label won't fit, they may use a securely attached tag instead, as with tags or decals on gas cylinders.

Answer

With a note on the bill of lading only

Answer

By painting the cylinder red

Answer

No marking is needed on cylinders

Question 2

A cargo tank holding more than 119 gallons has been emptied but still has hazmat residue inside. Must it stay placarded?

Accepted Answer

Yes, a bulk package with residue must still be placarded — Bulk packaging means a single container over 119 gallons. Both the bulk package and the vehicle carrying it need placards even if only residue is left.

Answer

No, empty tanks never need placards

Answer

Only if the tank will be refilled the same day

Answer

Only on the two sides of the tank

Question 3

Your load is below the amount that requires placards, but you want to display them anyway. Is that allowed?

Accepted Answer

Yes, as long as the placards correctly identify the hazard of the material — The rules allow placards to be displayed for hazardous materials even when they aren't required, provided each placard names the correct hazard for the cargo.

Answer

No, placards may be shown only when required

Answer

Yes, any placard may be used as a general warning

Answer

Only DANGEROUS placards may be shown voluntarily

Question 4

How far must a hazmat placard be from any other marking on the vehicle?

Accepted Answer

At least three inches — Each placard must sit at least three inches from other markings, stay clear of ladders, doors, and tarps, and be easy to see from the direction it faces.

Answer

At least one inch

Answer

At least 12 inches

Answer

There is no spacing rule

Question 5

Besides spelling out 'hazardous materials,' what short form might you see on road signs?

Accepted Answer

HAZMAT — The manual notes that the term is often shortened to HAZMAT on road signs and to HM in government regulations.

Answer

HM-ROAD

Answer

DGX

Answer

TOX

Question 6

When is it allowed to display DANGEROUS placards in place of a separate placard for each Table 2 class?

Accepted Answer

With at least 1,001 pounds across two or more Table 2 classes, none of which had 2,205 pounds or more loaded at one place — The DANGEROUS placard is optional. It may stand in for individual Table 2 placards when the load holds at least 1,001 pounds combined across two or more Table 2 classes and no single class reached 2,205 pounds loaded at one place.

Answer

Whenever you carry any Table 1 material

Answer

Whenever the load is under 1,001 pounds

Answer

Whenever the shipper runs out of the specific placards

Question 7

On a tractor-semitrailer, where may the front hazmat placard be mounted?

Accepted Answer

On the front of either the tractor or the trailer — Placards are required on each side and each end of the vehicle. The front one may go on the tractor's front or on the trailer's front.

Answer

Only on the tractor's front bumper

Answer

Only on the nose of the trailer

Answer

Inside the windshield

Question 8

You carry 600 pounds of a Table 2 flammable liquid and 500 pounds of a Table 2 corrosive, all in non-bulk packages. Do you need placards?

Accepted Answer

Yes, because the Table 2 total reaches 1,001 pounds or more — For non-bulk Table 2 materials, add up the amounts from every shipping paper. A combined total of 1,001 pounds or more, packaging included, triggers placards.

Answer

No, because neither material alone reaches 1,001 pounds

Answer

No, because Table 2 materials never need placards

Answer

Yes, but only on the rear of the vehicle

Question 9

A carrier wants to add the slogan 'Drive Safely' to the hazmat placards on its trucks. Is that allowed?

Accepted Answer

No, slogans like that are prohibited on placards — Placards must be clean, level, set against a contrasting background, and free of extra messages. The rules specifically ban 'Drive Safely' and other slogans.

Answer

Yes, if the slogan is in small print

Answer

Yes, on the side placards only

Answer

Yes, if the carrier's logo is shown too

Question 10

A bus driver should watch riders' baggage for diamond-shaped hazard labels. How big are these labels?

Accepted Answer

Four inches — Shippers mark hazmat containers with the material's name, ID number, and a hazard label. The manual describes nine different diamond-shaped labels, each four inches.

Answer

About 10 inches, the same as a placard

Answer

One inch

Answer

Two feet

Question 11

The words INHALATION HAZARD appear on a package's shipping paper. What placarding does that add?

Accepted Answer

POISON GAS or POISON INHALATION placards, on top of the class placards, at any amount — Any material marked INHALATION HAZARD needs a POISON GAS or POISON INHALATION placard on top of the placards its hazard class calls for, and the 1,000-pound exception does not cover it.

Answer

None, if the load is under 1,001 pounds

Answer

Only an orange panel showing the ID number

Answer

A DANGEROUS placard in place of the class placard

Question 12

On a placard that identifies a primary or subsidiary hazard class, where must the class or division number appear?

Accepted Answer

In the lower corner — Placards used for a primary or subsidiary hazard class show the hazard class or division number in the lower corner.

Answer

In the upper corner

Answer

Across the middle in large letters

Answer

On a separate sign beside it

Nevada CDL — General Knowledge: Road Signs practice test

Study questions with answers

1. A compressed gas cylinder won't hold a diamond-shaped hazard label. How may the shipper show the hazard?

2. A cargo tank holding more than 119 gallons has been emptied but still has hazmat residue inside. Must it stay placarded?

3. Your load is below the amount that requires placards, but you want to display them anyway. Is that allowed?

4. How far must a hazmat placard be from any other marking on the vehicle?

5. Besides spelling out 'hazardous materials,' what short form might you see on road signs?

6. When is it allowed to display DANGEROUS placards in place of a separate placard for each Table 2 class?

7. On a tractor-semitrailer, where may the front hazmat placard be mounted?

8. You carry 600 pounds of a Table 2 flammable liquid and 500 pounds of a Table 2 corrosive, all in non-bulk packages. Do you need placards?

9. A carrier wants to add the slogan 'Drive Safely' to the hazmat placards on its trucks. Is that allowed?

10. A bus driver should watch riders' baggage for diamond-shaped hazard labels. How big are these labels?

11. The words INHALATION HAZARD appear on a package's shipping paper. What placarding does that add?

12. On a placard that identifies a primary or subsidiary hazard class, where must the class or division number appear?

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