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CDL hazardous materials practice test 4

25 more questions on hazardous materials, written from the Missouri Commercial Driver License Manual (AAMVA model CDL manual, Version 4.0).

25 questions

  1. Question 1Which of these is a duty of the driver of a hazardous materials shipment?

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    D: Transporting the shipment safely and without delay. The driver makes sure the shipment is properly identified, marked and labeled, refuses leaking packages, placards when required and transports the shipment safely and without delay. Missouri Commercial Driver License Manual (AAMVA model CDL manual, Version 4.0): 9.2.3 The Driver, page 9-2.

  2. Question 2To decide which placards you need, which three things must you know?

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    A: The hazard class, the amount shipped, and the total weight of all classes of hazardous materials on the vehicle. Placard choice depends on three facts: the hazard class, how much of it is being shipped, and the total weight of all hazmat classes on board. Missouri Commercial Driver License Manual (AAMVA model CDL manual, Version 4.0): 9.3.10 Placarding, page 9-9.

  3. Question 3How should breakable containers of corrosive liquid be loaded by hand?

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    A: One by one, right side up, onto an even floor. Load breakable containers of corrosive liquid one by one, right side up, without dropping or rolling them, onto an even floor surface. Missouri Commercial Driver License Manual (AAMVA model CDL manual, Version 4.0): 9.4.1 Precautions for Specific Hazards: Class 8 (Corrosive), page 9-11.

  4. Question 4How far may you drive a leaking cargo tank of flammable liquid?

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    D: No farther than needed to reach a safe place. A leaking cargo tank may only be moved as far as it takes to reach a safe place; pull off the road if you can do it safely (49 CFR 177.823(c)). Missouri Commercial Driver License Manual (AAMVA model CDL manual, Version 4.0): 9.7.4 Responses to Specific Hazards: Class 3 (Flammable Liquids), page 9-17.

  5. Question 5When must a driver report a hazmat accident or incident to the proper government agency?

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    A: When it happens while the driver is in physical control of the shipment. The driver reports accidents and incidents involving hazardous materials to the proper agency when they occur while the driver is in physical control of the shipment. Missouri Commercial Driver License Manual (AAMVA model CDL manual, Version 4.0): 9.2.3 The Driver, page 9-2.

  6. Question 6How much of a Placard Table 1 material must be on board before placards are required?

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    A: Any amount. Table 1 materials must be placarded whenever any amount is transported (49 CFR 172.504(e) Table 1). Missouri Commercial Driver License Manual (AAMVA model CDL manual, Version 4.0): 9.3.11 Placard Tables, page 9-9.

  7. Question 7Where must nitric acid NOT be loaded?

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    B: Above any other product. Do not load nitric acid above any other product. Missouri Commercial Driver License Manual (AAMVA model CDL manual, Version 4.0): 9.4.1 Precautions for Specific Hazards: Class 8 (Corrosive), page 9-11.

  8. Question 8A package of flammable solids is smoldering. What should you do?

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    A: Do not open it; remove it from the vehicle if you can safely do so. Leave smoldering flammable-solid packages closed and take them off the vehicle if it is safe. Removing undamaged packages can also lower the fire risk. Missouri Commercial Driver License Manual (AAMVA model CDL manual, Version 4.0): 9.7.4 Responses to Specific Hazards: Class 4 and Class 5, page 9-17.

  9. Question 9How many hazard classes are there for hazardous materials?

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    C: Nine. A material's hazard class reflects its risks, and there are nine different hazard classes. Missouri Commercial Driver License Manual (AAMVA model CDL manual, Version 4.0): 9.3.1 Definitions, page 9-3.

  10. Question 10For non-bulk packages, Placard Table 2 materials need placards when the total amount reaches what?

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    C: 1,001 pounds or more, including the packaging. Non-bulk Table 2 materials need placards only once the total reaches 1,001 pounds or more, packaging included. Add up all your shipping papers to get the total (49 CFR 172.504(c)). Missouri Commercial Driver License Manual (AAMVA model CDL manual, Version 4.0): 9.3.11 Placard Tables, page 9-9.

  11. Question 11Corrosive liquids must never be loaded next to or above which of these?

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    C: Division 4.1 flammable solids. Never load corrosive liquids next to or above Division 1.4, Division 4.1, Division 4.3, Class 5 or Division 2.3 Zone B materials. Missouri Commercial Driver License Manual (AAMVA model CDL manual, Version 4.0): 9.4.1 Precautions for Specific Hazards: Class 8 (Corrosive), page 9-11.

  12. Question 12You suspect a leaking Division 6.1 poison may also be flammable. What should you do?

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    B: Take the added precautions for flammable liquids or gases: no smoking, open flame or welding. Many poisons are also flammable. If you think a Division 2.3 or 6.1 material might be flammable, take the added precautions for flammable liquids or gases and allow no smoking, open flame or welding. Missouri Commercial Driver License Manual (AAMVA model CDL manual, Version 4.0): 9.7.4 Responses to Specific Hazards: Class 6, page 9-17.

  13. Question 13Gasoline belongs to which hazard class?

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    B: Class 3. Class 3 is flammable liquids; the manual gives gasoline as its example. Missouri Commercial Driver License Manual (AAMVA model CDL manual, Version 4.0): 9.3.1 Definitions (Figure 9.1), page 9-3.

  14. Question 14You are hauling 60 pounds of Division 2.3 (poison gas) material in non-bulk packages. Do you need placards?

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    D: Yes, POISON GAS placards are required for any amount. Division 2.3 is in Placard Table 1, so POISON GAS placards are required for any amount. Missouri Commercial Driver License Manual (AAMVA model CDL manual, Version 4.0): 9.3.11 Placard Tables (Figure 9.7), page 9-9.

  15. Question 15How should charged storage batteries be loaded?

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    D: Right side up so their liquid won't spill, protected from other cargo that could short them. Load charged batteries upright so the liquid can't spill, and make sure no other cargo can fall on them or short them out. Missouri Commercial Driver License Manual (AAMVA model CDL manual, Version 4.0): 9.4.1 Precautions for Specific Hazards: Class 8 (Corrosive), page 9-11.

  16. Question 16What must happen to a vehicle involved in a leak of Division 2.3 or Division 6.1 poison before it is used again?

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    C: It must be checked for stray poison. A vehicle involved in a leak of Division 2.3 or 6.1 material must be checked for stray poison before being used again. Missouri Commercial Driver License Manual (AAMVA model CDL manual, Version 4.0): 9.7.4 Responses to Specific Hazards: Class 6, page 9-17.

  17. Question 17Propane is an example of which division?

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    D: Division 2.1, Flammable Gas. Figure 9.1 lists propane as the example for Division 2.1, flammable gases. Missouri Commercial Driver License Manual (AAMVA model CDL manual, Version 4.0): 9.3.1 Definitions (Figure 9.1), page 9-3.

  18. Question 18Which of these materials must be placarded in ANY amount?

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    B: Division 1.1, Mass Explosive. Divisions 1.1, 1.2 and 1.3 explosives are Table 1 materials and need placards for any amount; Divisions 2.2, Class 3 and Class 8 are Table 2. Missouri Commercial Driver License Manual (AAMVA model CDL manual, Version 4.0): 9.3.11 Placard Tables (Figure 9.7), page 9-9.

  19. Question 19Your vehicle has no racks for compressed gas cylinders. How must they be loaded?

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    A: Upright on a flat floor, in boxes that keep them from turning over. Without racks the floor must be flat, and cylinders must be held upright, in racks or in boxes that keep them from turning over. Missouri Commercial Driver License Manual (AAMVA model CDL manual, Version 4.0): 9.4.1 Precautions for Specific Hazards: Class 2 (Compressed Gases), page 9-11.

  20. Question 20A package of Division 6.2 infectious substances is damaged during handling. What should you do first?

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    D: Immediately contact your supervisor. If a Division 6.2 package is damaged in handling or transportation, contact your supervisor immediately; don't accept packages that appear damaged or leaking. Missouri Commercial Driver License Manual (AAMVA model CDL manual, Version 4.0): 9.7.4 Responses to Specific Hazards: Class 6, page 9-17.

  21. Question 21A material labeled 'Dangerous When Wet,' such as sodium, belongs to which division?

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    A: Division 4.3. Division 4.3 is dangerous when wet; the manual's example is sodium. Missouri Commercial Driver License Manual (AAMVA model CDL manual, Version 4.0): 9.3.1 Definitions (Figure 9.1), page 9-3.

  22. Question 22Packages of Class 7 radioactive material carry which label that makes placards required for any amount?

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    C: Radioactive Yellow III. Placard Table 1 lists Class 7 with the Radioactive Yellow III label only; those shipments need RADIOACTIVE placards in any amount. Missouri Commercial Driver License Manual (AAMVA model CDL manual, Version 4.0): 9.3.11 Placard Tables (Figure 9.7), page 9-9.

  23. Question 23When may compressed gas cylinders be loaded lying down (horizontally)?

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    B: When the cylinder is designed so the relief valve is in the vapor space. Cylinders may be loaded horizontally if they are designed so the relief valve is in the vapor space. Missouri Commercial Driver License Manual (AAMVA model CDL manual, Version 4.0): 9.4.1 Precautions for Specific Hazards: Class 2 (Compressed Gases), page 9-11.

  24. Question 24Radioactive material has spilled inside your vehicle. When may the vehicle be used again?

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    A: After it is cleaned and checked with a survey meter. Don't touch the spilled material or breathe it in. The vehicle stays out of service until it has been cleaned and checked with a survey meter. Missouri Commercial Driver License Manual (AAMVA model CDL manual, Version 4.0): 9.7.4 Responses to Specific Hazards: Class 7 (Radioactive), page 9-17.

  25. Question 25Which hazard class covers corrosive materials such as battery fluid?

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    B: Class 8. Class 8 is corrosives; battery fluid is the manual's example. Missouri Commercial Driver License Manual (AAMVA model CDL manual, Version 4.0): 9.3.1 Definitions (Figure 9.1), page 9-3.

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Our own questions, written from the Missouri Commercial Driver License Manual (AAMVA model CDL manual, Version 4.0), official manual, and checked against it.