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Ohio hazardous materials: test 4

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Ohio Hazardous materials Test 4

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Question 1 of 16
  1. 1. Two hazardous products each have correct papers. What else must be checked before placing them together in the same cargo space?
  2. 2. A visitor wants to smoke next to a truck being unloaded with Class 3 flammable liquid. What should the driver do?
  3. 3. A placarded vehicle requires attendance. The attendant is outside, 80 feet away, but a building blocks the view. Does this meet the attendance definition?
  4. 4. A placarded vehicle needs an attendant. Does a driver asleep in the sleeper berth satisfy the rule?
  5. 5. What makes a parking area a safe haven for unattended Division 1.1, 1.2 or 1.3 loads?
  6. 6. A truck containing Division 1.2 material is parked four feet from the traveled part of a public highway. Is this allowed under the parking rule?
  7. 7. A driver of a placarded Class 3 vehicle wants to park within five feet of the traveled roadway for personal shopping. Does the brief operational-necessity exception cover that stop?
  8. 8. A Division 1.1 vehicle is to be parked 200 feet from a dwelling, with no qualifying operational necessity. Is that within the prohibited zone?
  9. 9. Before parking a Division 1.3 vehicle on private property, what must the person in charge of that property know and provide?
  10. 10. How close may a vehicle carrying covered hazardous materials be parked to an open fire under 397.11?
  11. 11. A placarded truck contains Class 3 flammable liquid. Someone stands 15 feet away with a lit cigarette. Is that far enough under the smoking rule?
  12. 12. An empty tank vehicle previously carried placard-required Class 3 flammable liquid. Does emptying the liquid by itself remove the 25-foot smoking restriction?
  13. 13. A truck containing covered hazardous materials stops to refuel its own fuel tank. What does the hazmat fueling rule require?
  14. 14. A normal truck power unit carries hazardous materials in a quantity requiring placards. What is its minimum required extinguisher rating?
  15. 15. An empty cargo tank used for Class 3 flammable-liquid transportation breaks down. Which warning equipment is appropriate to carry?
  16. 16. When does the tire rule for covered hazardous-material vehicles require examination of each tire?
Review all 16 questions with answers

  1. Two hazardous products each have correct papers. What else must be checked before placing them together in the same cargo space?

    Correct answer: Whether the applicable segregation rules allow that combination.

    Properly documented products can still be incompatible. The handbook points to the federal segregation rules; documentation alone does not authorize mixed loading.

    Source: Ohio Commercial Driver License Manual (HSY 7605 7/26), Section 9.4.2, Mixed loads; physical PDF page 108 (printed 9-12). Section 9 version July 2017; factual safety concept reviewed September 14, 2026. ↗

  2. A visitor wants to smoke next to a truck being unloaded with Class 3 flammable liquid. What should the driver do?

    Correct answer: Keep smoking and other ignition sources away from the operation.

    Smoking on or about the vehicle during the covered loading or unloading operation is forbidden. The rule also requires care to keep flames and lit smoking materials away.

    Source: 49 CFR 177.834(c)–(d). Official eCFR XML dated September 10, 2026; reviewed September 14, 2026. ↗

  3. A placarded vehicle requires attendance. The attendant is outside, 80 feet away, but a building blocks the view. Does this meet the attendance definition?

    Correct answer: No; the vehicle must be in unobstructed view.

    An outside attendant must be within 100 feet and have an unobstructed view. On the vehicle, the attendant must be awake and not in a sleeper berth.

    Source: 49 CFR 397.5(d)(1). Official eCFR XML dated September 10, 2026; reviewed September 14, 2026. ↗

  4. A placarded vehicle needs an attendant. Does a driver asleep in the sleeper berth satisfy the rule?

    Correct answer: No; the on-vehicle attendant must be awake and outside the sleeper berth.

    The attendance definition specifically excludes sleeping and the sleeper berth. Its alternative outside position requires distance and unobstructed-view conditions.

    Source: 49 CFR 397.5(d)(1). Official eCFR XML dated September 10, 2026; reviewed September 14, 2026. ↗

  5. What makes a parking area a safe haven for unattended Division 1.1, 1.2 or 1.3 loads?

    Correct answer: Specific written approval by a local, state or federal authority.

    Safe haven is a defined approval status, not a driver's description of a convenient place. The other applicable attendance conditions still matter.

    Source: 49 CFR 397.5(b), (d)(3). Official eCFR XML dated September 10, 2026; reviewed September 14, 2026. ↗

  6. A truck containing Division 1.2 material is parked four feet from the traveled part of a public highway. Is this allowed under the parking rule?

    Correct answer: No; it cannot be parked on or within five feet.

    172.504 identifies this hazard for placarding, and 397.7(a)(1) forbids parking on or within five feet of the traveled portion of a public street or highway.

    Source: 49 CFR 397.7(a)(1). Official eCFR XML dated September 10, 2026; reviewed September 14, 2026. ↗

  7. A driver of a placarded Class 3 vehicle wants to park within five feet of the traveled roadway for personal shopping. Does the brief operational-necessity exception cover that stop?

    Correct answer: No; personal shopping is not the stated operational necessity.

    The exception requires a brief operational necessity and impracticability of parking elsewhere. It does not provide a general convenience-parking exemption.

    Source: 49 CFR 397.7(b). Official eCFR XML dated September 10, 2026; reviewed September 14, 2026. ↗

  8. A Division 1.1 vehicle is to be parked 200 feet from a dwelling, with no qualifying operational necessity. Is that within the prohibited zone?

    Correct answer: Yes; the rule uses 300 feet in these circumstances.

    The rule restricts parking within 300 feet of bridges, tunnels, dwellings and places where people work or assemble, with a narrowly stated brief operational exception.

    Source: 49 CFR 397.7(a)(3). Official eCFR XML dated September 10, 2026; reviewed September 14, 2026. ↗

  9. Before parking a Division 1.3 vehicle on private property, what must the person in charge of that property know and provide?

    Correct answer: Awareness of the hazardous contents and consent to park.

    Knowledge and consent must come from the person in charge of the property, who must be aware of the nature of the hazardous materials.

    Source: 49 CFR 397.7(a)(2). Official eCFR XML dated September 10, 2026; reviewed September 14, 2026. ↗

  10. How close may a vehicle carrying covered hazardous materials be parked to an open fire under 397.11?

    Correct answer: It must not be parked within 300 feet.

    The parking restriction is 300 feet. Passing an open fire is a separate issue requiring precautions to establish that the vehicle can safely pass without stopping.

    Source: 49 CFR 397.11(a)–(b). Official eCFR XML dated September 10, 2026; reviewed September 14, 2026. ↗

  11. A placarded truck contains Class 3 flammable liquid. Someone stands 15 feet away with a lit cigarette. Is that far enough under the smoking rule?

    Correct answer: No; the prohibited area extends to 25 feet.

    397.13 prohibits smoking or carrying lit cigarettes, cigars or pipes on or within 25 feet of the listed hazardous-material vehicles.

    Source: 49 CFR 397.13(a). Official eCFR XML dated September 10, 2026; reviewed September 14, 2026. ↗

  12. An empty tank vehicle previously carried placard-required Class 3 flammable liquid. Does emptying the liquid by itself remove the 25-foot smoking restriction?

    Correct answer: No; the rule also covers this empty tank vehicle.

    The rule expressly covers an empty tank motor vehicle used for the specified flammable liquid or gas service when marking or placarding was required.

    Source: 49 CFR 397.13(b). Official eCFR XML dated September 10, 2026; reviewed September 14, 2026. ↗

  13. A truck containing covered hazardous materials stops to refuel its own fuel tank. What does the hazmat fueling rule require?

    Correct answer: Engine off, with a person controlling the fueling at the fill point.

    397.15 concerns fueling the motor vehicle itself. It requires the engine not to operate and a person to control the fueling process where the fuel tank is filled.

    Source: 49 CFR 397.15(a)–(b). Official eCFR XML dated September 10, 2026; reviewed September 14, 2026. ↗

  14. A normal truck power unit carries hazardous materials in a quantity requiring placards. What is its minimum required extinguisher rating?

    Correct answer: One extinguisher rated at least 10 B:C.

    The placard-required power-unit minimum is 10 B:C. The extinguisher must also be accessible, charged and securely mounted; a rating does not authorize untrained cargo-fire response.

    Source: 49 CFR 393.95(a)(1)(i), (a)(2)–(4). Official eCFR XML dated September 10, 2026; reviewed September 14, 2026. ↗

  15. An empty cargo tank used for Class 3 flammable-liquid transportation breaks down. Which warning equipment is appropriate to carry?

    Correct answer: Required reflective triangles, without flame-producing signals.

    Flame-producing signals must not be carried on the specified cargo tank whether loaded or empty. The required reflective triangles provide a non-flame warning option.

    Source: 49 CFR 393.95(f)(1), (g). Official eCFR XML dated September 10, 2026; reviewed September 14, 2026. ↗

  16. When does the tire rule for covered hazardous-material vehicles require examination of each tire?

    Correct answer: At the start of each trip and each time the vehicle is parked.

    397.17(a) specifies trip-start and each-parking examinations. It does not replace the driver's other inspection duties.

    Source: 49 CFR 397.17(a). Official eCFR XML dated September 10, 2026; reviewed September 14, 2026. ↗

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Question reference: oh-cdl-hazmat-049

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Ohio hazardous materials: test 4

Parking, fire precautions and equipment. 16 questions with immediate explanations. Independent study, not a BMV examination or registered ELDT.

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Study notes: hazardous materials

The H endorsement does not replace hazardous-material employee training or applicable security requirements. Federal rules control the legal scenarios; the older handbook contains superseded reporting and ORM-D language. Cargo, packaging, weight and exceptions matter together. These questions do not authorize handling a spill or fighting a cargo fire.

Read the conditions, not just the number

  • The Table 2 weight exception concerns specified non-bulk packages. Gross package weight includes the package and its contents, not the truck.
  • A qualifying attendant outside a parked vehicle needs both the required distance and an unobstructed view. Sleeping in the berth is not attendance.
  • An incident that directly causes public evacuation for exactly one hour meets that reporting trigger. Telephone and detailed written reports have separate deadlines.
  • At a leak, keep away, use available shipment information safely and request trained assistance. Do not continue driving to find a truck stop.
Federal placarding conditionsTelephone incident reporting

Practice 80 questions with answer explanations. Complete hands-on instruction and any required registered ELDT separately. Some manual chapters are older; check the handbook guide for source dates and coverage.

Read the official Ohio chapter