Louisiana Commercial Driver License
Hazardous Materials Endorsement Exam
Practice Questions And Correct Answers
1. A carrier transports UN1203, Gasoline, in a cargo tank with a capacity of 8,500
gallons. The tank is divided into three compartments: 3,000 gal, 3,000 gal, and 2,500
gal. If the carrier loads 2,800 gallons in the first compartment, 2,900 gallons in the
second, and 2,400 gallons in the third, which statement is true regarding the
applicability of the hazardous materials regulations?
A. The shipment is exempt because the total volume is less than 10,000 gallons.
B. The shipment is fully regulated because the quantity in one compartment exceeds 119
gallons.
C. The shipment is partially exempt because each compartment is under 3,000 gallons.
D. The shipment is exempt under the 'materials of trade' exception.
Answer: B. The shipment is fully regulated because the quantity in one compartment
exceeds 119 gallons.
Rationale: Gasoline (UN1203) is a Class 3 flammable liquid. The 119-gallon per package
exception does not apply to cargo tanks; any quantity in a cargo tank requires full
regulation. Exemptions for small quantities do not apply to bulk packaging such as cargo
tanks. The total volume or compartment size does not create an exemption.
Page 1 of 64
,2. A driver is preparing to transport a load of Division 1.1 explosives and Division 2.1
flammable gas cylinders. According to the segregation table in 49 CFR 177.848, which
of the following loading arrangements is permissible?
A. Explosives and flammable gas may be loaded in the same vehicle if separated by 10
feet.
B. Explosives and flammable gas may be loaded together only if the gas cylinders are in
a closed metal container.
C. Explosives and flammable gas must not be loaded together in the same vehicle.
D. Explosives and flammable gas may be loaded together if the vehicle is equipped with
a fire suppression system.
Answer: C. Explosives and flammable gas must not be loaded together in the same
vehicle.
Rationale: The segregation table prohibits loading Division 1.1 explosives with Division
2.1 flammable gases in the same vehicle. Separation or special containers do not override
the prohibition. Fire suppression systems do not alter segregation requirements.
Page 2 of 64
,3. A Louisiana intrastate carrier transports a placarded load of corrosive material
through a residential area. Which of the following best describes the required route
selection and communication obligations under Louisiana law and 49 CFR?
A. The carrier may use any route if the vehicle is placarded and the driver has a HazMat
endorsement.
B. The carrier must use routes designated by the Louisiana Department of Transportation
and Development and comply with local restrictions.
C. The carrier must notify the Louisiana State Police before entering any residential area.
D. The carrier is exempt from route restrictions if the shipment is under 1,000 pounds.
Answer: B. The carrier must use routes designated by the Louisiana Department of
Transportation and Development and comply with local restrictions.
Rationale: Federal law (49 CFR 397.101) requires carriers to use routes designated by
state or local authorities for hazardous materials. Louisiana designates specific routes
through LaDOTD, and local restrictions must be followed. Notification to state police is
not generally required for routine transport, and weight exemptions do not apply to route
restrictions.
4. A driver discovers a small leak of a Division 6.1 Packing Group I liquid from a
drum during transit. According to the Emergency Response Guidebook (ERG), which
initial isolation distance should be used for a small spill?
A. 50 meters (150 feet)
B. 100 meters (300 feet)
C. 150 meters (500 feet)
D. 300 meters (1000 feet)
Answer: B. 100 meters (300 feet)
Rationale: For a small spill of a Division 6.1 Packing Group I material, the ERG typically
recommends an initial isolation distance of 100 meters (300 feet). This distance may vary
by specific material, but 100 meters is the standard for many PG I toxic liquids. The other
distances are used for larger spills or different hazard classes.
Page 3 of 64
, 5. When completing a shipping paper for a hazardous material, which of the following
sequences correctly reflects the required basic description order under 49 CFR
172.202?
A. Proper shipping name, hazard class, UN identification number, packing group
B. UN identification number, proper shipping name, hazard class, packing group
C. Hazard class, UN identification number, proper shipping name, packing group
D. Packing group, proper shipping name, hazard class, UN identification number
Answer: A. Proper shipping name, hazard class, UN identification number, packing
group
Rationale: 49 CFR 172.202 requires the basic description to be in the order: proper
shipping name, hazard class or division, UN identification number, and packing group (if
applicable). The other sequences are incorrect and would not comply with federal law.
6. A cargo tank motor vehicle is transporting a hazardous material that requires a
DOT Specification 406 tank. Which of the following conditions would render the tank
out of specification for continued service?
A. A missing specification plate that can be replaced within 30 days
B. Dents that exceed 1 inch in depth on the shell
C. A small scratch on the exterior paint
D. A missing valve handle that can be manually operated
Answer: B. Dents that exceed 1 inch in depth on the shell
Rationale: Dents exceeding 1 inch in depth on the shell of a DOT 406 cargo tank may
compromise structural integrity and render it out of specification. Missing specification
plates or valve handles must be corrected but do not necessarily render the tank out of
service immediately. Cosmetic scratches do not affect specification compliance.
Page 4 of 64
Hazardous Materials Endorsement Exam
Practice Questions And Correct Answers
1. A carrier transports UN1203, Gasoline, in a cargo tank with a capacity of 8,500
gallons. The tank is divided into three compartments: 3,000 gal, 3,000 gal, and 2,500
gal. If the carrier loads 2,800 gallons in the first compartment, 2,900 gallons in the
second, and 2,400 gallons in the third, which statement is true regarding the
applicability of the hazardous materials regulations?
A. The shipment is exempt because the total volume is less than 10,000 gallons.
B. The shipment is fully regulated because the quantity in one compartment exceeds 119
gallons.
C. The shipment is partially exempt because each compartment is under 3,000 gallons.
D. The shipment is exempt under the 'materials of trade' exception.
Answer: B. The shipment is fully regulated because the quantity in one compartment
exceeds 119 gallons.
Rationale: Gasoline (UN1203) is a Class 3 flammable liquid. The 119-gallon per package
exception does not apply to cargo tanks; any quantity in a cargo tank requires full
regulation. Exemptions for small quantities do not apply to bulk packaging such as cargo
tanks. The total volume or compartment size does not create an exemption.
Page 1 of 64
,2. A driver is preparing to transport a load of Division 1.1 explosives and Division 2.1
flammable gas cylinders. According to the segregation table in 49 CFR 177.848, which
of the following loading arrangements is permissible?
A. Explosives and flammable gas may be loaded in the same vehicle if separated by 10
feet.
B. Explosives and flammable gas may be loaded together only if the gas cylinders are in
a closed metal container.
C. Explosives and flammable gas must not be loaded together in the same vehicle.
D. Explosives and flammable gas may be loaded together if the vehicle is equipped with
a fire suppression system.
Answer: C. Explosives and flammable gas must not be loaded together in the same
vehicle.
Rationale: The segregation table prohibits loading Division 1.1 explosives with Division
2.1 flammable gases in the same vehicle. Separation or special containers do not override
the prohibition. Fire suppression systems do not alter segregation requirements.
Page 2 of 64
,3. A Louisiana intrastate carrier transports a placarded load of corrosive material
through a residential area. Which of the following best describes the required route
selection and communication obligations under Louisiana law and 49 CFR?
A. The carrier may use any route if the vehicle is placarded and the driver has a HazMat
endorsement.
B. The carrier must use routes designated by the Louisiana Department of Transportation
and Development and comply with local restrictions.
C. The carrier must notify the Louisiana State Police before entering any residential area.
D. The carrier is exempt from route restrictions if the shipment is under 1,000 pounds.
Answer: B. The carrier must use routes designated by the Louisiana Department of
Transportation and Development and comply with local restrictions.
Rationale: Federal law (49 CFR 397.101) requires carriers to use routes designated by
state or local authorities for hazardous materials. Louisiana designates specific routes
through LaDOTD, and local restrictions must be followed. Notification to state police is
not generally required for routine transport, and weight exemptions do not apply to route
restrictions.
4. A driver discovers a small leak of a Division 6.1 Packing Group I liquid from a
drum during transit. According to the Emergency Response Guidebook (ERG), which
initial isolation distance should be used for a small spill?
A. 50 meters (150 feet)
B. 100 meters (300 feet)
C. 150 meters (500 feet)
D. 300 meters (1000 feet)
Answer: B. 100 meters (300 feet)
Rationale: For a small spill of a Division 6.1 Packing Group I material, the ERG typically
recommends an initial isolation distance of 100 meters (300 feet). This distance may vary
by specific material, but 100 meters is the standard for many PG I toxic liquids. The other
distances are used for larger spills or different hazard classes.
Page 3 of 64
, 5. When completing a shipping paper for a hazardous material, which of the following
sequences correctly reflects the required basic description order under 49 CFR
172.202?
A. Proper shipping name, hazard class, UN identification number, packing group
B. UN identification number, proper shipping name, hazard class, packing group
C. Hazard class, UN identification number, proper shipping name, packing group
D. Packing group, proper shipping name, hazard class, UN identification number
Answer: A. Proper shipping name, hazard class, UN identification number, packing
group
Rationale: 49 CFR 172.202 requires the basic description to be in the order: proper
shipping name, hazard class or division, UN identification number, and packing group (if
applicable). The other sequences are incorrect and would not comply with federal law.
6. A cargo tank motor vehicle is transporting a hazardous material that requires a
DOT Specification 406 tank. Which of the following conditions would render the tank
out of specification for continued service?
A. A missing specification plate that can be replaced within 30 days
B. Dents that exceed 1 inch in depth on the shell
C. A small scratch on the exterior paint
D. A missing valve handle that can be manually operated
Answer: B. Dents that exceed 1 inch in depth on the shell
Rationale: Dents exceeding 1 inch in depth on the shell of a DOT 406 cargo tank may
compromise structural integrity and render it out of specification. Missing specification
plates or valve handles must be corrected but do not necessarily render the tank out of
service immediately. Cosmetic scratches do not affect specification compliance.
Page 4 of 64
