25 realistic Hazardous Materials practice questions for Nevada CDL applicants. Required for: Drivers transporting placarded hazardous materials. Official test: 30 questions, 24 correct to pass.
Question 1 of 25 · HazMat Driving
What should a driver do before transporting any HazMat shipment?
-
A.
Inspect the placards and shipping papers
-
B.
Inspect the vehicle and cargo
-
C.
Plan the route
-
D.
All of the above
Correct answer: D.
Verify all paperwork, vehicle, cargo, and route before HazMat transport.
Question 2 of 25 · Shipping Papers
HazMat shipping papers must be:
-
A.
Out of the driver's reach
-
B.
Within the driver's reach while driving and clearly distinguished from other shipping papers
-
C.
In the trailer with the cargo
-
D.
Mailed to the receiver in advance
Correct answer: B.
Shipping papers must be within reach and identifiable. They must be on the seat or in a door pouch.
Question 3 of 25 · HazMat Driving
Drivers must avoid which of these areas when transporting HazMat?
-
A.
Tunnels and bridges where prohibited
-
B.
Heavily populated areas when alternative routes exist
-
C.
Open flames or heat sources
-
D.
All of the above
Correct answer: D.
Avoid restricted areas, populated zones, and any ignition sources.
Question 4 of 25 · Placards
Placards are warning signs placed on:
-
A.
Drivers' shirts
-
B.
The outside of vehicles transporting HazMat
-
C.
The shipping papers only
-
D.
Inside the cab
Correct answer: B.
Diamond-shaped placards on the four sides of the vehicle warn others of hazardous cargo.
Question 5 of 25 · Loading
What does "blasting agents" refer to?
-
A.
Materials used to detonate explosives
-
B.
A class of explosives sensitive to ignition
-
C.
Cleaning agents
-
D.
Aerosol propellants
Correct answer: A.
Blasting agents are materials designed to be set off using a detonator.
Question 6 of 25 · Emergency Equipment
Are flares allowed when stopped near a HazMat leak?
-
A.
Yes, always use flares
-
B.
No, do not use flares near a HazMat leak — use reflective triangles
-
C.
Only with permission
-
D.
Only at night
Correct answer: B.
Open flames are dangerous near leaks. Use reflective triangles instead.
Question 7 of 25 · Loading
When loading or unloading HazMat:
-
A.
Set the parking brake
-
B.
Be sure the cargo is properly braced
-
C.
Stay close to the vehicle
-
D.
All of the above
Correct answer: D.
Keep the brakes set, secure cargo, and remain on alert during loading and unloading.
Question 8 of 25 · Emergencies
What should you do if HazMat spills on the ground?
-
A.
Cover with sand or absorbent material
-
B.
Drive away from the spill
-
C.
Get qualified help to handle the spill
-
D.
Wash it down with water
Correct answer: C.
Get trained responders. Don't cover, push, or wash the spill yourself.
Question 9 of 25 · Loading
Which of the following must NEVER be transported with a HazMat shipment?
-
A.
Routine cargo
-
B.
Other foods
-
C.
Class A or B explosives without segregation tables
-
D.
Pet food
Correct answer: C.
Explosives have strict segregation rules. Always consult the segregation table.
Question 10 of 25 · Shipping Papers
Where must HazMat shipping papers be kept while loading or unloading?
-
A.
In the cab only
-
B.
On the dock with the cargo
-
C.
On the seat of the cab or in a door pouch within reach
-
D.
Locked in the glove box
Correct answer: C.
Papers must be readily accessible at all times during transport.
Question 11 of 25 · Emergencies
Which of these is the best advice if you have a HazMat leak?
-
A.
Continue to the destination
-
B.
Stop, secure the area, communicate the danger, get help
-
C.
Try to repair it yourself
-
D.
Cover the leak
Correct answer: B.
Stop, secure, communicate, and get qualified help. Don't try to handle leaks yourself.
Question 12 of 25 · CDL Rules
Drivers transporting HazMat must have:
-
A.
Only a regular driver license
-
B.
A valid CDL with HazMat endorsement and TSA security threat assessment
-
C.
A passport
-
D.
Physician's certification only
Correct answer: B.
A current CDL with HazMat endorsement (and TSA background check) is required.
Question 13 of 25 · Shipping Papers
How can a driver determine the hazard class of a material?
-
A.
Read the shipping paper or check the Hazardous Materials Table
-
B.
Smell the package
-
C.
Open the container
-
D.
Ask other drivers
Correct answer: A.
The hazard class appears on shipping papers; the Hazardous Materials Table is the master reference.
Question 14 of 25 · Tank Operations
Which of these are dangers of hauling liquids in tanks?
-
A.
Liquid surge
-
B.
Outage requirements
-
C.
Top-heavy load
-
D.
All of the above
Correct answer: D.
Surge, outage, and high center of gravity all make tank vehicles uniquely dangerous.
Question 15 of 25 · Parking
When is parking allowed for HazMat vehicles?
-
A.
On highway shoulders for any reason
-
B.
In safe locations away from open flames, heat sources, and people
-
C.
Anywhere is fine
-
D.
Only at truck stops
Correct answer: B.
Park away from people, fires, ignition sources, and within sight when possible.
Question 16 of 25 · Placards
What does each placard show?
-
A.
The hazard class number
-
B.
A pictorial symbol for the hazard
-
C.
The four-digit ID number when required
-
D.
All of the above
Correct answer: D.
Placards show the hazard class number, symbol, and ID number when required.
Question 17 of 25 · Emergencies
When must drivers inform the carrier and emergency responders during a HazMat emergency?
-
A.
As soon as it's safe to do so
-
B.
When they reach the destination
-
C.
Only after the cargo is unloaded
-
D.
Only if asked
Correct answer: A.
Notify carrier and authorities immediately as soon as you can safely do so.
Question 18 of 25 · Loading
You should turn off your engine when:
-
A.
Loading or unloading flammable liquids
-
B.
Driving on a hill
-
C.
Inspecting brakes
-
D.
Refueling on the highway
Correct answer: A.
Turn off the engine when loading or unloading flammable liquids to reduce ignition risk.
Question 19 of 25 · HazMat Driving
When can drivers smoke around a HazMat vehicle?
-
A.
While driving only
-
B.
When parked at a truck stop
-
C.
Never within 25 feet of certain materials
-
D.
Whenever convenient
Correct answer: C.
Smoking is forbidden within 25 feet of HazMat including explosives, oxidizers, or flammables.
Question 20 of 25 · HazMat Basics
What's the most important reason for these regulations?
-
A.
Public safety
-
B.
Protect the environment
-
C.
Protect the carrier
-
D.
All of the above
Correct answer: D.
Regulations protect people, property, and the environment.
Question 21 of 25 · HazMat Driving
Drivers transporting Division 1.1, 1.2, or 1.3 explosives may NOT:
-
A.
Take a route that goes through tunnels prohibiting explosives
-
B.
Refuel at any station
-
C.
Travel during business hours
-
D.
Cross any state line
Correct answer: A.
Avoid tunnels and routes prohibiting explosives. Use only approved routes.
Question 22 of 25 · HazMat Driving
When transporting HazMat over long distances, drivers should:
-
A.
Stay alert, take rest breaks, and inspect the load regularly
-
B.
Drive at maximum speed limit
-
C.
Skip rest stops to save time
-
D.
Avoid highways
Correct answer: A.
Stay alert with regular rest breaks; inspect cargo at every stop.
Question 23 of 25 · HazMat Driving
What is the speed limit when transporting HazMat through a tunnel?
-
A.
Tunnel speed limit minus 10 mph
-
B.
Posted limit
-
C.
No speed limit applies to HazMat
-
D.
Posted speed unless lower limit is posted for HazMat
Correct answer: D.
Follow posted limits; lower limits often apply specifically to HazMat in tunnels.
Question 24 of 25 · Placards
Which of these placards has a yellow background?
-
A.
Flammable solids
-
B.
Oxidizers
-
C.
Corrosives
-
D.
Radioactive
Correct answer: B.
Yellow background placards typically indicate oxidizers.
Question 25 of 25 · HazMat Basics
What is "hazard class"?
-
A.
A grouping of materials by hazard type
-
B.
A type of placard
-
C.
A required driving license
-
D.
A type of HazMat trailer
Correct answer: A.
There are nine hazard classes that group materials with similar dangers.
About the Hazardous Materials Test
The Hazardous Materials (HazMat) test covers the rules for transporting materials that pose a risk to health, safety, and property. Topics include the hazardous materials table, shipping papers, marking, labeling, placarding, loading and unloading, bulk packaging, driving and parking rules, communications, emergencies, and hazardous materials regulations enforced by the U.S. Department of Transportation Pipeline and Hazardous Materials Safety Administration. A federal Transportation Security Administration (TSA) background check is also required.
The Nevada Department of Motor Vehicles administers this knowledge test as part of its commercial driver license program. To earn the HazMat Endorsement (H) on your Nevada CDL, you need to score at least 24 out of 30 on the official version.
Topics covered on this practice test
- HazMat Driving: 6 questions
- Loading: 4 questions
- Shipping Papers: 3 questions
- Placards: 3 questions
- Emergencies: 3 questions
- HazMat Basics: 2 questions
- Emergency Equipment: 1 question
- CDL Rules: 1 question
- Tank Operations: 1 question
- Parking: 1 question
How to use this practice test
- Read each question carefully. CDL questions are written precisely — small wording differences matter.
- Click "Show Answers & Explanations" only after answering every question. Don't peek mid-test.
- Read the explanation for every question, even ones you got right. The reasoning is more important than the answer.
- Repeat the test until you score 100%. The questions are deterministic per state, so you can track your improvement over multiple sessions.
- Move on to the other endorsement tests for Nevada until you're ready for the official exam.
Tips specific to the Hazardous Materials test
HazMat is the longest knowledge test (30 questions) and adds a Transportation Security Administration (TSA) background check. Most candidates struggle with placard colors, the segregation table, shipping paper requirements, and emergency response procedures. Use the official Emergency Response Guidebook (ERG) alongside this practice set.