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Texas CDL Hazmat Endorsement (H) Practice Exam Questions
Section 1: Hazard Classes & Identification (Q1–15)
1. Which hazard class covers explosives?
A) Class 2
B) Class 3
C) Class 1
D) Class 4
Answer: C — Class 1 includes explosives, divided into six divisions (1.1–1.6) based on hazard
severity.
2. Which hazard class includes flammable liquids such as gasoline?
A) Class 1
B) Class 2
C) Class 3
D) Class 5
Answer: C — Class 3 covers flammable and combustible liquids with a flash point below
140°F (60°C).
3. Which hazard class covers compressed gases like propane and oxygen?
A) Class 1
B) Class 2
C) Class 3
D) Class 8
Answer: B — Class 2 includes flammable gas (2.1), nonflammable gas (2.2), and poison gas
(2.3).
4. Which hazard class covers corrosive materials?
A) Class 5
B) Class 6
C) Class 7
D) Class 8
Answer: D — Class 8 includes corrosive materials that can destroy skin or metals.
5. Which hazard class covers radioactive materials?
A) Class 5
B) Class 6
C) Class 7
D) Class 9
Answer: C — Class 7 covers radioactive materials emitting ionizing radiation.
6. Which hazard class covers poisonous (toxic) materials and infectious substances?
A) Class 4
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B) Class 5
C) Class 6
D) Class 8
Answer: C — Class 6 includes toxic materials (6.1) and infectious substances (6.2).
7. Which hazard class covers flammable solids, spontaneously combustible materials, and
dangerous-when-wet materials?
A) Class 2
B) Class 3
C) Class 4
D) Class 5
Answer: C — Class 4 materials can ignite or react dangerously under various conditions.
8. Which hazard class covers oxidizers like ammonium nitrate fertilizer?
A) Class 3
B) Class 4
C) Class 5
D) Class 6
Answer: C — Class 5 (oxidizers) can intensify fires and are common in agricultural transport.
9. How many major hazard classes are in the U.S. hazardous materials classification
system?
A) 5
B) 7
C) 9
D) 12
Answer: C — There are nine major hazard classes, with several containing subdivisions.
10. What does a UN number (e.g., UN1203) identify on a shipping paper?
A) The weight of the shipment
B) The specific hazardous material
C) The shipping company
D) The destination
Answer: B — The UN number uniquely identifies the specific hazardous material
internationally.
11. Who is responsible for determining if a material is hazardous?
A) The driver
B) The shipper
C) The receiver
D) The police
Answer: B — The shipper classifies the material, determines its hazard class, and provides
proper shipping papers and packaging.
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12. What is the primary purpose of hazardous materials regulations?
A) To increase shipping costs
B) To protect life, property, and the environment from hazmat risks
C) To reduce the number of commercial drivers
D) To generate government revenue
Answer: B — Regulations establish requirements for classification, packaging, labeling,
placarding, and handling to ensure safety.
13. What is a hazardous material?
A) Only a substance that is poisonous
B) Any cargo that is expensive
C) A material capable of posing an unreasonable risk to health, safety, or property during
transportation
D) Only gasoline
Answer: C — Hazardous materials include substances presenting physical, chemical,
biological, or radiological hazards.
14. Which endorsement code identifies hazardous materials transportation on a CDL?
A) N
B) P
C) H
D) T
Answer: C — The H endorsement authorizes hazardous materials transport. N = tank
vehicle, P = passenger, T = doubles/triples.
15. What does the X endorsement authorize?
A) Passenger vehicles only
B) Combined tank vehicle and hazardous materials operation
C) School bus operation
D) Doubles/triples only
Answer: B — X is the combined H (Hazmat) and N (Tanker) endorsement.
Section 2: Placarding & Marking Requirements (Q16–28)
16. What is the primary purpose of placards on a hazardous materials vehicle?
A) To display the company logo
B) To indicate vehicle ownership
C) To warn others of the hazards of the materials being transported
D) To advertise the cargo
Answer: C — Placards warn emergency responders and the public about the nature of
hazmat on board.
17. Where must placards be displayed on a vehicle?
A) Only on the front
Texas CDL Hazmat Endorsement (H) Practice Exam Questions
Section 1: Hazard Classes & Identification (Q1–15)
1. Which hazard class covers explosives?
A) Class 2
B) Class 3
C) Class 1
D) Class 4
Answer: C — Class 1 includes explosives, divided into six divisions (1.1–1.6) based on hazard
severity.
2. Which hazard class includes flammable liquids such as gasoline?
A) Class 1
B) Class 2
C) Class 3
D) Class 5
Answer: C — Class 3 covers flammable and combustible liquids with a flash point below
140°F (60°C).
3. Which hazard class covers compressed gases like propane and oxygen?
A) Class 1
B) Class 2
C) Class 3
D) Class 8
Answer: B — Class 2 includes flammable gas (2.1), nonflammable gas (2.2), and poison gas
(2.3).
4. Which hazard class covers corrosive materials?
A) Class 5
B) Class 6
C) Class 7
D) Class 8
Answer: D — Class 8 includes corrosive materials that can destroy skin or metals.
5. Which hazard class covers radioactive materials?
A) Class 5
B) Class 6
C) Class 7
D) Class 9
Answer: C — Class 7 covers radioactive materials emitting ionizing radiation.
6. Which hazard class covers poisonous (toxic) materials and infectious substances?
A) Class 4
, 2
B) Class 5
C) Class 6
D) Class 8
Answer: C — Class 6 includes toxic materials (6.1) and infectious substances (6.2).
7. Which hazard class covers flammable solids, spontaneously combustible materials, and
dangerous-when-wet materials?
A) Class 2
B) Class 3
C) Class 4
D) Class 5
Answer: C — Class 4 materials can ignite or react dangerously under various conditions.
8. Which hazard class covers oxidizers like ammonium nitrate fertilizer?
A) Class 3
B) Class 4
C) Class 5
D) Class 6
Answer: C — Class 5 (oxidizers) can intensify fires and are common in agricultural transport.
9. How many major hazard classes are in the U.S. hazardous materials classification
system?
A) 5
B) 7
C) 9
D) 12
Answer: C — There are nine major hazard classes, with several containing subdivisions.
10. What does a UN number (e.g., UN1203) identify on a shipping paper?
A) The weight of the shipment
B) The specific hazardous material
C) The shipping company
D) The destination
Answer: B — The UN number uniquely identifies the specific hazardous material
internationally.
11. Who is responsible for determining if a material is hazardous?
A) The driver
B) The shipper
C) The receiver
D) The police
Answer: B — The shipper classifies the material, determines its hazard class, and provides
proper shipping papers and packaging.
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12. What is the primary purpose of hazardous materials regulations?
A) To increase shipping costs
B) To protect life, property, and the environment from hazmat risks
C) To reduce the number of commercial drivers
D) To generate government revenue
Answer: B — Regulations establish requirements for classification, packaging, labeling,
placarding, and handling to ensure safety.
13. What is a hazardous material?
A) Only a substance that is poisonous
B) Any cargo that is expensive
C) A material capable of posing an unreasonable risk to health, safety, or property during
transportation
D) Only gasoline
Answer: C — Hazardous materials include substances presenting physical, chemical,
biological, or radiological hazards.
14. Which endorsement code identifies hazardous materials transportation on a CDL?
A) N
B) P
C) H
D) T
Answer: C — The H endorsement authorizes hazardous materials transport. N = tank
vehicle, P = passenger, T = doubles/triples.
15. What does the X endorsement authorize?
A) Passenger vehicles only
B) Combined tank vehicle and hazardous materials operation
C) School bus operation
D) Doubles/triples only
Answer: B — X is the combined H (Hazmat) and N (Tanker) endorsement.
Section 2: Placarding & Marking Requirements (Q16–28)
16. What is the primary purpose of placards on a hazardous materials vehicle?
A) To display the company logo
B) To indicate vehicle ownership
C) To warn others of the hazards of the materials being transported
D) To advertise the cargo
Answer: C — Placards warn emergency responders and the public about the nature of
hazmat on board.
17. Where must placards be displayed on a vehicle?
A) Only on the front
