Before a placarded trip through several jurisdictions, how should a driver deal with local route and permit requirements?
Correct answer: Check the applicable requirements before entering each area.
The handbook directs drivers to check local hazardous-material routing and permit rules before the trip. A route suitable for ordinary freight may not be suitable for placarded cargo.
Source: South Carolina Commercial Driver License Manual, body March 2025; 9.6.5, route restrictions, printed 9-14; physical PDF page 130; reviewed September 21, 2026. ↗
For a load of Division 1.1, 1.2 or 1.3 explosives, which additional documents should the driver have besides the shipping papers?
Correct answer: The required written emergency instructions, Part 397 rules and written route plan.
The handbook requires these explosive-load documents and says the driver must be familiar with the instructions. Shipping papers alone do not satisfy the additional requirements.
Source: South Carolina Commercial Driver License Manual, body March 2025; 9.6.10, explosive-load documents, printed 9-15; physical PDF page 131; reviewed September 21, 2026. ↗
After a hazardous-cargo crash, which action best protects people while trained help is arriving?
Correct answer: Keep people away, stay upwind and give responders the shipping information.
Stay away from the hazard and keep others back. The handbook recommends remaining upwind and providing shipping papers and emergency-response information to responders.
Source: South Carolina Commercial Driver License Manual, body March 2025; 9.7.2, accident response, printed 9-15; physical PDF page 131; reviewed September 21, 2026. ↗
Flames are coming from hazardous cargo, and you have no special response training or protective equipment. What should you do?
Correct answer: Keep a safe distance, protect others from approaching and get emergency help.
The handbook warns against fighting hazardous-material fires without the proper training and protective equipment. A vehicle extinguisher does not make a driver a hazmat responder.
Source: South Carolina Commercial Driver License Manual, body March 2025; 9.7.3, hazardous-cargo fires, printed 9-15; physical PDF page 131; reviewed September 21, 2026. ↗
You discover a hazardous-cargo leak while stopped. Should you drive along a public road just to find a telephone?
Correct answer: No; obtain help without driving merely to reach a telephone.
Do not spread a leaking shipment along the road to reach a telephone. The handbook permits movement only when needed for safety and when it can be done without danger.
Source: South Carolina Commercial Driver License Manual, body March 2025; 9.7.3, leaks and getting help, printed 9-16; physical PDF page 132; reviewed September 21, 2026. ↗
Before pickup, you see damage to the package of an infectious substance. How should you handle acceptance?
Correct answer: Do not accept it; notify the shipper about the damage.
The handbook says not to accept a damaged package containing an infectious substance and to notify the shipper. Concealing damage does not establish safe packaging.
Source: South Carolina Commercial Driver License Manual, body March 2025; 9.7.4, infectious substances, printed 9-17; physical PDF page 133; reviewed September 21, 2026. ↗
After poison cargo leaks in a vehicle, what should happen before the vehicle is used again?
Correct answer: It must be cleaned and checked by qualified people so it is safe to use.
The handbook requires a poison-contaminated vehicle to be cleaned and checked before reuse. A visual impression or disappearing odor does not show that contamination is gone.
Source: South Carolina Commercial Driver License Manual, body March 2025; 9.7.4, poisons and contamination, printed 9-16; physical PDF page 132; reviewed September 21, 2026. ↗
Your load requires placards, but the shipping clerk says they can be fitted at the first rest stop. When must they be displayed?
Correct answer: Before the vehicle is driven with the load.
Required placards must be in place before the vehicle moves with the hazardous load. Correct paperwork does not postpone the placarding requirement.
Source: South Carolina Commercial Driver License Manual, body March 2025; 9.3.10, placing required placards, printed 9-8; physical PDF page 124; reviewed September 21, 2026. ↗
A vehicle with a cargo heater is assigned Class 1, Division 2.1 or Class 3 cargo. What should be checked before using the vehicle?
Correct answer: The special cargo-heater requirements for the particular hazardous material.
These classes have specific cargo-heater restrictions. The driver's handbook directs drivers to check the applicable rules; heater use is not decided merely by outside temperature.
Source: South Carolina Commercial Driver License Manual, body March 2025; 9.4.1, cargo heaters, printed 9-10; physical PDF page 126; reviewed September 21, 2026. ↗
A shipment is identified as dangerous when wet. What loading condition must be avoided?
Correct answer: Exposure to moisture that could trigger a dangerous reaction.
Some Class 4 and Class 5 materials react dangerously with water. The handbook requires those materials to stay dry during transit and during loading and unloading.
Source: South Carolina Commercial Driver License Manual, body March 2025; 9.4.1, Classes 4 and 5, printed 9-11; physical PDF page 127; reviewed September 21, 2026. ↗
What does the handbook require when carrying materials that are liable to spontaneous combustion?
Correct answer: Provide enough ventilation to keep them from heating up.
The handbook calls for adequate ventilation so these materials do not heat up and ignite. Follow the requirements for the specific material and packaging.
Source: South Carolina Commercial Driver License Manual, body March 2025; 9.4.1, Classes 4 and 5, printed 9-11; physical PDF page 127; reviewed September 21, 2026. ↗
Compressed-gas transfer is complete. What must happen before the tank vehicle is moved?
Correct answer: Shut off the engine before unhooking hoses, and disconnect all loading or unloading connections before moving.
The handbook says to shut the engine off before disconnecting hoses and to disconnect every loading or unloading connection before the vehicle moves. Check that the transfer equipment is clear.
Source: South Carolina Commercial Driver License Manual, body March 2025; 9.5.4, compressed gas, printed 9-13; physical PDF page 129; reviewed September 21, 2026. ↗
When storage batteries are loaded, what must their securement prevent?
Correct answer: Movement, electrical short circuits and spilled battery liquid.
The handbook requires storage batteries to be loaded so they cannot move, short circuit or spill. Ordinary cargo stacking is not sufficient if it leaves those hazards.
Source: South Carolina Commercial Driver License Manual, body March 2025; 9.4.1, corrosive storage batteries, printed 9-11; physical PDF page 127; reviewed September 21, 2026. ↗
A package containing Class 1 material appears oily or dampened at pickup. What should the driver do?
Correct answer: Refuse the package until it has been properly resolved.
The handbook says to refuse damaged explosive packages and those that appear oily or damp. A driver should not improvise a repair and transport the questionable package.
Source: South Carolina Commercial Driver License Manual, body March 2025; 9.4.1, Class 1 materials, printed 9-11; physical PDF page 127; reviewed September 21, 2026. ↗
Where should nitric acid NOT be loaded in relation to other products?
Correct answer: Above other products where a leak could run onto them.
The handbook says not to load nitric acid above other products. Positioning must also satisfy the applicable segregation, securement and packaging requirements.
Source: South Carolina Commercial Driver License Manual, body March 2025; 9.4.1, corrosive liquids, printed 9-11; physical PDF page 127; reviewed September 21, 2026. ↗
The only emergency-response instructions are sealed inside a package containing hazardous material. Does this meet the required access standard?
Correct answer: No; the information must be available away from the package and immediately accessible as required.
Emergency-response information must be available away from the package and immediately accessible to the people who must use it. Storing the only instructions inside the hazardous package does not meet that purpose.
Source: 49 CFR 172.602(b)(2) and (c)(1); current renumbered access provisions; eCFR current through September 17, 2026, read and reviewed September 21, 2026. ↗
