CDL Hazardous Materials Endorsement (HME) flashcards

UN1072, Oxygen, compressed, is a Class 2.2 (Non-Flammable Gas) and requires a Class 2.2 placard on all four sides of a bulk packaging or vehicle.

• Class 2.2 (Non-Flammable Gas).
• Table 1 material: placard any quantity in bulk.
• Placards on all four sides of the vehicle/container.

Memory trick: Oxygen's 'Two Two' class means 'Placards for You'!

Bulk packagings (e.g., cargo tanks, portable tanks) containing a Poison Inhalation Hazard (PIH) must be marked with the words 'INHALATION HAZARD' on two opposing sides.

• Applies to bulk quantities of PIH materials.
• Words must be 'INHALATION HAZARD'.
• Displayed on two opposing sides of the vehicle/container.

Memory trick: PIH in 'Bulk'? Make sure they 'Inhale the Hazard Warning'!

ERI provides critical guidance on how to handle hazardous materials incidents, including first aid, spill procedures, and fire fighting.

• Required for all hazardous materials shipments.
• Must be readily accessible to the driver.
• Often includes the ERG (Emergency Response Guidebook) or equivalent documents.

Memory trick: ERI: Easy to Reach, Instantly!

When transporting two or more Table 2 hazardous materials in non-bulk packaging, if their aggregate gross weight is 1,001 pounds or more, specific placards for each hazard class present in quantities requiring placarding are required.

• Applies to Table 2 materials only.
• Threshold is 1,001 pounds aggregate gross weight.
• Requires specific placards for each hazard class contributing to the threshold.

Memory trick: Mixed loads, check the sum, over a grand, placards must come.

Hazardous materials shipping papers must be immediately accessible to the driver while at the vehicle's controls, or on the driver's seat when out of the vehicle.

• Essential for emergency responders.
• Must be within driver's reach when seated and belted.
• Alternatively, on the driver's seat when driver is out of vehicle.

Memory trick: Keep the 'Papers' close, for safety's 'Sake'!

The required order of hazardous material information on shipping papers: Proper Shipping Name, Hazard Class, Identification Number, Packing Group.

• Ensures consistent communication of hazards.
• Critical for emergency response.
• Must be followed precisely.

Memory trick: Properly Classify ID'd Packages!

If the total aggregate gross weight of all Table 2 hazardous materials in non-bulk packages on a vehicle exceeds 1,001 pounds, then placards for each class present must be displayed.

• Applies to Table 2 materials.
• Considers the combined weight of all applicable hazmat.
• If threshold met, each specific hazard class must be placarded.

Memory trick: Add the weights, then apply the signs!

If emergency response information is not on shipping papers, it must be in a separate, clearly marked document (like the ERG) for quick access.

• Must be readily accessible to the driver.
• Must be clearly identifiable.
• ERG is a common form of separate ERI.

Memory trick: Tab it, grab it, fast access!

The FLAMMABLE GAS placard is required for vehicles transporting Class 2.1 Flammable Gases in quantities that meet or exceed specific placarding thresholds.

• Used for Class 2.1 hazardous materials.
• Required for bulk packaging and non-bulk over 1,001 lbs.
• UN1075 (LPG) is a common example.

Memory trick: Flammable Gas, a fiery blast, placard it fast, so danger won't last.

Before transporting hazardous materials, the driver must verify that the shipping papers accurately describe the hazardous materials being transported and that the information matches the packages.

• Driver's critical safety check.
• Ensures compliance with regulations.
• Involves checking proper shipping name, hazard class, UN/NA ID, quantity.

Memory trick: Papers in hand, verify with care, what's on the truck, what's written there.

The 'OXYGEN' placard is specifically required for shipments of UN1072, Oxygen, compressed or refrigerated liquid, when the quantity exceeds the placarding threshold, overriding the general 'NON-FLAMMABLE GAS' placard.

• Applies to UN1072 (Oxygen).
• Required over 1,001 lbs (non-bulk).
• Overrides general Class 2.2 placard.

Memory trick: Oxygen's special, blue and bold, no 'non-flammable,' stories told.

Certain highly hazardous materials (Table 1) require placarding on a vehicle regardless of the quantity being transported.

• Includes explosives, poison gas, dangerous when wet, and radioactive materials.
• Also includes Division 2.1 (Flammable Gas) and Division 2.3 (Poison Gas).
• Identification numbers are generally required on placards for these materials.

Memory trick: Any quantity of these will make your trip a Table 1 event!

Packages containing hazardous materials with both a primary and a subsidiary hazard must display labels for both hazards.

• Primary label identifies the main danger.
• Subsidiary label identifies additional significant dangers.
• Both labels must be clearly visible on the package.

Memory trick: For 'Double Trouble', show 'Both Labels'!

When transporting a 'Not Otherwise Specified' (N.O.S.) hazardous material in an Intermediate Bulk Container (IBC), the technical name of the material must be displayed on the IBC near the identification number.

• Applies to N.O.S. entries in IBCs.
• IBCs are considered bulk packagings.
• Technical name provides specific hazard identification.

Memory trick: IBC's N.O.S.? Give the 'Specifics'!

When transporting a 'Not Otherwise Specified' (N.O.S.) hazardous material in bulk packaging, the technical name of the material must be displayed on the packaging near the identification number.

• Applies to N.O.S. entries only.
• Required on bulk packagings (e.g., portable tanks, cargo tanks).
• Provides specific identification of the hazard.

Memory trick: N.O.S. needs 'NO Specific' name, but for bulk, you MUST 'Know the Specific'!

If a driver discovers a discrepancy between the hazardous material being transported and the information on the shipping papers, the driver must contact the shipper to resolve the issue before continuing transport.

• Driver's responsibility to verify accuracy.
• Discrepancies must be resolved with the shipper.
• Resolution must occur before or during transport, not after.

Memory trick: Found a 'Paper Problem'? 'Call the Shipper' to fix it!

For hazardous materials listed in Table 2 of 49 CFR 172.504, placards are required when the aggregate gross weight of all such materials on a vehicle is 1,001 pounds or more.

• Applies to most common hazardous materials.
• Threshold is 1,001 pounds.
• If exceeded, placards must be displayed on all four sides.

Memory trick: Over 'One Thousand' pounds? Time to 'Placard' for all to see!

Hazard labels must be placed on a package containing hazardous materials on the same surface as the consignee's or consignor's name and address, or adjacent to the proper shipping name.

• Ensures visibility of hazard information.
• Must be near consignor/consignee info or shipping name.
• Applies to non-bulk packaging.

Memory trick: Label's place, near the name, avoids a chase, for safety's fame.

When a vehicle is placarded with a FLAMMABLE, FLAMMABLE GAS, POISON GAS, or DANGEROUS WHEN WET placard, other Class 3, 8, or 9 materials that would normally require placarding under Table 2 (1,001 lb threshold) do not require their specific placards if they are below their Table 1 threshold.

• Applies to specific combinations of placards.
• Allows for fewer placards in certain mixed loads.
• Does not exempt Table 1 materials or bulk quantities.

Memory trick: When 'Many Hazards' mix, check 'Exceptions' for the fix!

For bulk packaging (e.g., cargo tanks), the UN/NA identification number must be displayed on orange panels or white square-on-point displays on all four sides of the vehicle, in addition to placards.

• Applies to bulk packaging (e.g., cargo tanks, portable tanks).
• Displayed on orange panels or white square-on-point.
• Must be visible from all four sides of the vehicle.

Memory trick: ID's on display, orange or white, all around the tank, for safety's light.

Packages containing hazardous materials must be marked with the appropriate identification number (UN or NA number) for the material.

• Mandatory for almost all hazardous material packages.
• Must be durable and visible.
• Provides immediate identification of the material.

Memory trick: For every 'HazMat Box', know its 'ID Number'!

In an accident where the driver exits the vehicle, hazardous materials shipping papers must be placed on the driver's seat or in a holder on the inside of the driver's door for easy access by emergency responders.

• Required by 49 CFR 177.817(e).
• Ensures immediate access for emergency personnel.
• Applies when the driver leaves the vehicle's cab.

Memory trick: Crash and dash, papers in sight, for responders' quick, life-saving light.

For Poison Inhalation Hazard (PIH) materials, the words 'Poison Inhalation Hazard' or 'Inhalation Hazard' must appear on shipping papers. If the quantity meets or exceeds the Reportable Quantity (RQ), 'RQ' must also be indicated.

• Required by 49 CFR 172.203(m) and 172.203(c).
• PIH phrase follows basic description.
• RQ indicates a specific quantity threshold.

Memory trick: Beyond the basics, PIH and RQ, special words for dangers, clear for you.

Placarding involves displaying diamond-shaped signs on vehicles to communicate the primary hazard class of materials being transported.

• Required for certain quantities of hazardous materials.
• Must be visible from all four sides of the vehicle.
• Indicates hazard class and sometimes UN/NA identification number.

Memory trick: See the signs, save the lives!

The minimum aggregate gross weight of hazardous materials (1,001 pounds) that requires a vehicle to be placarded, with exceptions for certain materials like Class 1 and 2.3.

• Applies to most hazard classes in non-bulk packages.
• Aggregate gross weight calculation.
• Some materials (e.g., Table 1) always require placards regardless of weight.

Memory trick: A Thousand and One reasons to placard!

The required order of information for hazardous materials on shipping papers: Proper Shipping Name, Hazard Class, Identification Number, and Packing Group (if applicable).

• Mandatory for all hazardous material shipments.
• Must appear in a specific order.
• Provides essential information for emergency responders.

Memory trick: Don't forget the 'SHIP' for 'Shipping Paper Info'!

Hazardous materials listed in Table 1 of 49 CFR 172.504 must be placarded regardless of the quantity transported, meaning the 1,001-pound aggregate threshold does not apply to them.

• Applies to certain high-hazard materials (e.g., Explosives, Poisons, Radioactive, Oxidizers).
• Placarding required for 'any quantity'.
• Driver must identify if material is Table 1 or Table 2.

Memory trick: Table One's a threat, placard it quick, no matter the weight, it's a dangerous trick.

For Table 2 hazardous materials, placards are required only if the aggregate gross weight of all Table 2 materials in the vehicle exceeds 1,001 pounds.

• Applies to materials listed in HM Table 2.
• Threshold is 1,001 pounds aggregate gross weight.
• Below this threshold, no placards are required for Table 2 materials.
• Above this, a 'DANGEROUS' placard or specific placards are needed.

Memory trick: One thousand and one pounds, for Table 2, sets the placard bounds.

Intermediate Bulk Containers (IBCs) require specific UN packaging symbols and codes to indicate their design type and material, beyond standard hazard communication.

• Applies to IBCs as bulk packagings.
• UN packaging symbol and code (e.g., 31H1 for composite IBC) is required.
• Indicates design type, material, and performance standards.
• Different from labels (for non-bulk) or general placards.

Memory trick: IBCs show their UN code, telling their design and their load.

If a hazardous material delivery cannot be completed, the driver must retain control and accessibility of the shipping papers, taking them back if the vehicle is not left at the delivery point.

• Shipping papers must be immediately accessible to the driver.
• Must remain with the driver if the vehicle is moved.
• Never leave papers unsecured with an unattended hazmat shipment.
• Ensures emergency information is always available.

Memory trick: Papers stay with the driver, always ready for any arriver.

Bulk packagings containing N.O.S. (Not Otherwise Specified) hazardous materials must display the technical names of the hazardous components along with the proper shipping name.

• Applies to bulk packagings (e.g., portable tanks, cargo tanks).
• Required for N.O.S. (Not Otherwise Specified) entries.
• Technical names of hazardous components are displayed.
• Usually in parentheses, adjacent to the proper shipping name.

Memory trick: N.O.S. in bulk? Tech names, you must include, to make it clear.

Bulk packagings containing Poison Inhalation Hazard materials require specific wording adjacent to the identification number to highlight the PIH danger.

• Applies to bulk packaging only.
• Wording must be 'POISON-INHALATION HAZARD' or 'POISONOUS-INHALATION HAZARD'.
• Must be adjacent to the identification number.

Memory trick: Poison's Inhalation Hazard, next to the ID, is how bulk PIH is identified.

Non-bulk packages of hazardous materials require specific markings like proper shipping name, identification number, and hazard labels/class, but not the consignee's address on each package.

• Proper shipping name is required.
• Identification number is required.
• Hazard class/label is required.
• Consignee's address is not typically a package marking requirement.

Memory trick: ID, Name, Class: the essential three for a HazMat package to see.

A driver must ensure hazardous material packages are properly labeled and marked. Illegible or missing labels mean the package is non-compliant and cannot be transported.

• Driver's responsibility for package compliance.
• Illegible/missing labels constitute non-compliance.
• Must refuse to transport or ensure resolution before moving.
• Compliance is paramount for safety and regulations.

Memory trick: Bad labels, no go, driver's duty, safety show.

Identification numbers for hazardous materials in bulk packaging must be displayed on the front, rear, and both sides of the vehicle or container.

• Applies to bulk packaging (e.g., cargo tanks, portable tanks).
• Displayed on front, rear, and both sides.
• Usually on or within the placard holder.

Memory trick: Front, Back, and Sides: The ID number hides nowhere from prying eyes.

Both primary and subsidiary hazard labels must be displayed adjacent to each other on the same surface of a package containing hazardous materials.

• Applies when both primary and subsidiary labels are required.
• Labels must be on the same surface of the package.
• Must be adjacent (side-by-side or one above the other).
• Ensures all hazards are clearly communicated.

Memory trick: Side-by-side, on the same face, all labels show their hazard place.

Methods used to prevent movement, rolling, or falling of compressed gas cylinders during transportation to ensure safety and prevent leaks or ruptures.

• Cylinders must be securely restrained.
• Upright orientation is often preferred for stability.
• Chains, straps, and racks are common securement devices.

Memory trick: Cylinders secured, no more fear, upright and tied, safety's clear.

Certain hazardous materials, due to their extreme hazard or physical state, are never permitted for transport in portable tanks.

• Portable tanks are for liquids/gases.
• Division 1.1 explosives are prohibited.
• Ensures containment matches hazard level.

Memory trick: Portable tanks are for flow, not for things that go BOOM!

Specific safety procedures regarding the vehicle's engine are required when loading Division 1.1 explosives to prevent accidental ignition.

• Applies to Division 1.1 explosives.
• Engine must be off.
• Parking brake must be set.

Memory trick: Explosives demand a 'full stop' from your vehicle's engine.

The federal regulation specifying that hazardous materials placards must be displayed on all four sides of a transport vehicle, freight container, or portable tank.

• Mandatory for placardable quantities.
• Ensures visibility from all directions.
• Critical for emergency response and public awareness.

Memory trick: Four sides bright, everyone in sight, for HazMat safety, day and night.

During loading or unloading of hazardous materials in a cargo tank, the attendant must remain within 25 feet of the tank.

• Applies to all hazmat cargo tanks.
• Ensures immediate response to incidents.
• Critical for safety during transfer operations.

Memory trick: Twenty-Five Feet, Ready to Meet.

Compressed gas cylinders can be transported either vertically or horizontally, provided specific securement precautions are met for each orientation.

• Vertical: protected from falling.
• Horizontal: secured against rolling.
• Prevents movement and valve damage.

Memory trick: Cylinders stand tall or lie flat, just keep them locked in place.

A specific segregation requirement prohibiting the transportation of Class 4.3 (Dangerous When Wet) materials and Class 2.1 (Flammable Gas) in the same transport vehicle due to their severe incompatibility.

• Class 4.3 reacts with water to produce flammable gases.
• Class 2.1 is already a flammable gas.
• Loading together is strictly forbidden by regulations.

Memory trick: Wet danger, gas flare, never together, beware!

Class 4.1 (Flammable Solids) and Class 5.1 (Oxidizers) are incompatible and have specific segregation rules when transported together.

• Class 4.1 and Class 5.1 are incompatible.
• Prohibited from same freight container.
• Permitted on same vehicle if not in same container.

Memory trick: Flammable solids and oxidizers are like oil and fire; keep them apart, especially in a box.

The driver must attend a cargo tank during unloading of hazardous materials from the start of connections until their full disconnection.

• Applies to hazardous materials in cargo tanks.
• Attendance from connection to disconnection.
• Ensures safety during critical transfer period.

Memory trick: Stay with the tank from 'hello connections' to 'goodbye pipes'.

Class 5.2 (Organic Peroxides) and Class 3 (Flammable Liquids) are incompatible and must not be loaded or transported together in the same transport vehicle.

• Incompatible due to dangerous reactions.
• Segregation code 'X' in 49 CFR 177.848(e).
• Prohibited from same vehicle transport.

Memory trick: Peroxide Flammable, Same Truck Unmanageable.

Techniques used to secure hazardous materials packages within a transport vehicle to prevent movement during transit.

• Prevents shifting and movement.
• Minimizes package damage.
• Reduces risk of leaks and spills.

Memory trick: Block and brace: like a seatbelt for your dangerous goods.

The requirement to physically separate Class 5.2 (Organic Peroxides) and Class 3 (Flammable Liquids) by at least one intervening package space or 24 inches when transported in the same vehicle.

• Both are fire hazards, but Organic Peroxides are highly reactive.
• Separation prevents intensification of a fire or reaction.
• Not forbidden on the same vehicle, but require strict separation.

Memory trick: Peroxide, fluid, give them space, for safety's sake, in any case.

Connecting two or more conductive objects with a conductor to equalize their electrical potential, primarily to prevent static electricity discharge during hazardous material transfer.

• Prevents static electricity buildup.
• Essential when transferring flammable liquids.
• Aids in safety to prevent ignition of vapors.

Memory trick: Bonding links, charges shrink, no spark, safe tank.

Specific ventilation procedures are required before entering the cargo area of an enclosed vehicle transporting hazardous materials.

• Applies to enclosed vehicles.
• Open doors (front & rear).
• Minimum 10-minute wait time.

Memory trick: Give your hazmat van a 'double-door, ten-minute' air-out before going in.

The minimum combined working load limit required for all tiedowns used to secure a portable tank, ensuring it can withstand forces encountered during transportation.

• Must be at least 1.5 times the gross weight.
• Applies to portable tanks of hazardous materials.
• Ensures adequate securement against dynamic forces.

Memory trick: One and a half times the weight, keeps the tank from taking flight.

The practice of separating hazardous materials that could react dangerously with each other if mixed or exposed.

• Prevents dangerous chemical reactions.
• Specific rules apply based on hazard classes.
• Methods include separate compartments, barriers, or distance.

Memory trick: Incompatible partners need a 'Barrier Between' or 'Compartment Containment' to prevent a 'Dangerous Dance'.

Specific minimum distances or separate compartments are required to segregate Division 2.3 (Poison Gas) from foodstuffs.

• Applies to Division 2.3 (Poison Gas).
• Segregation from foodstuffs.
• Minimum 12 feet distance or separate compartment.

Memory trick: Poison gas needs a 'dirty dozen' feet away from dinner.

Portable tanks on transport vehicles require sufficient tiedowns to prevent movement in all directions. For a 10-foot tank, a minimum of 4 tiedowns is generally required for proper securement.

• Prevents movement forward, rearward, and sideward.
• Number of tiedowns depends on tank length and weight.
• For 10-foot tanks, 4 tiedowns are standard for comprehensive securement.

Memory trick: Tank Ten Feet, Four Chains Complete.

When loading cargo tanks with Class 3 Flammable Liquids, the initial flow rate must be restricted to prevent hazardous static electricity buildup.

• Applies to Class 3 Flammable Liquids.
• Restricted flow prevents static discharge.
• Crucial for preventing ignition during filling.

Memory trick: Static Sparks Danger, Slow Start Safely.

Division 6.1 (Poisonous) materials must be segregated from foodstuffs, feed, or edible materials by a solid, leak-proof barrier from floor to ceiling.

• Applies to Division 6.1 Poisonous materials.
• Protects foodstuffs from contamination.
• Requires a physical, leak-proof barrier.

Memory trick: Food & Poison: Barrier Between, Safe & Sound.

Smoking, open flames, or any ignition sources are strictly prohibited within 25 feet of a cargo tank during hazardous materials loading or unloading operations.

• Applies to all hazmat cargo tanks.
• Prevents fire and explosion hazards.
• A universal safety regulation.

Memory trick: No Smoke Near Tank, Safety's the Rank.

The primary purpose of bonding a cargo tank to the loading rack during hazardous materials transfer is to equalize electrical potential and prevent static electricity discharge.

• Prevents static electricity buildup.
• Reduces risk of ignition of flammable vapors.
• Distinct from grounding, but often used in conjunction.

Memory trick: Bond for Balance, Static Silence.

The maximum aggregate gross weight of Division 1.4 (Explosives) that can be transported in a single vehicle without special routing or escort is 5,000 lbs.

• Applies to Division 1.4 Explosives.
• Exceeding 5,000 lbs triggers special routing/escort.
• Important for trip planning and regulatory compliance.

Memory trick: Five Thousand Pounds, Explosive Route Bound.

Vehicles must be secured against accidental movement during hazardous materials loading or unloading operations.

• Prevents roll-away.
• Protects personnel from injury.
• Prevents damage to cargo and equipment.

Memory trick: A secured truck is a safe truck, no surprises.