Hazardous materials homework - 12 questions

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Which of the following set of options is not considered to be contained in the seven classes of hazardous materials?

Toxic, corrosive, and explosive materials Flammable, oxidizers, and radioactive materials Spontaneously ignitable and food additive materials Explosive and corrosive materials

Question 1 4 points Save AnswerSave Answer

Which class of fire results from the combustion of materials occurring in or originating from energized electrical circuits?

Class D Class C

Class K

Class A

Question 2 4 points Save AnswerSave Answer

Which of the following statements is FALSE concerning the chemical phosphorus?

White phosphorus is also called yellow phosphorus.

Although water is effective as a fire extinguisher, the use of dry sand is also acceptable.

Dry sand, foam, or dry chemicals can be used in extinguishing red phosphorus fires.

Tetraphosphorus hexoxide, an extremely toxic agent, is the product of the complete combustion of phosphorus.

Question 3 4 points Save AnswerSave Answer

What distillate is labeled by DOT as a Flammable Liquid to containers and Flammable (when warranted) to bulk packaging, freight, and railcar shipments, along with being a preservative for utility poles and cross ties?

Carbon black

Flowers of sulfur

Creosote oil

Coal tar pitch

Question 4 4 points Save AnswerSave Answer

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Which of the following statements is TRUE?

When a battery is being charged, bubbles of hydrogen accumulate near its positive plate. Besides being toxic when inhaled, fluorine is also a powerful reducing agent. Combating an ongoing fire involving hydrogen should only be attempted when the flow of hydrogen from its containment vessel can be stopped without exposing personnel to risk. Argon has replaced the hydrogen formerly used in dirigibles to provide lifting power.

Question 5 4 points SavedSaved

Which of the following statements regarding diamond and/or graphite is false?

Diamond has the highest thermal conductivity of all substances. Graphite-based dry powder effectively extinquishes NFPA Class D fires. Diamond is converted to graphite in the absence of air @approximately 1830oC. Graphite and diamond are allotropes of carbon.

Question 6 4 points Save AnswerSave Answer

Which of the following statements is FALSE?

TSCA regulates existing hazards not covered by other federal laws dealing with toxic substances. The FDA ensures that the labeling of cosmetics is truthful and informative. The EPA establishes the requirements for identifying certain hazardous substances found in household products. The FAAA includes provisions to ensure that malt beverages intended for nonindustrial use are safe for consumption.

Question 7 4 points Save AnswerSave Answer

Which of the following methods describes the production of hydrogen for commercial use?

CH4(g) + H2O(g) --> 4 H2(g) + 2 CO(g) C(s) + H2O(g) --> CO(g) + H2(g) Methanol vapor and water are combined using a copper catalyst to form hydrogen and hydrogen chloride. Propane and water are reacted in a complicated manner to form hydrogen chloride and elemental hydrogen.

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Question 9

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The principal risk associated with exposure to elemental chlorine is __________. ingestion

suffocation

inhalation

skin contact

All of the following describe ozone, or its uses, EXCEPT:

it is used to bleach oils, fats, textiles, and sugar solutions. it is an allotrope of oxygen, but it is not effective as a microbiocide. ozone kills Cryptosporidium. inhaling low concentrations of ozone can exacerbate heart and lung illnesses and emphysema.

Question 10 4 points Save AnswerSave Answer

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Why is the spillage of liquid oxygen upon asphalt pavement potentially hazardous?

Question 11

Arial 3 (12pt)

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The DOT regulation at 49 CFR 174.450 previously stipulated that when fire occurs in a domestic rail

Question 12 30 points Save AnswerSave Answer

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shipment of charcoal in transit, water should not be used if it is practicable to locate and remove the burning charcoal. Any charcoal that becomes wet while a fire is being extinguished must be removed from the car and not reshipped, and the remaining charcoal must be held under observation in a dry place for at least 5 days before forwarding. What is the most likely reason DOT regulates the domestic transportation of charcoal in this fashion? What chemical reaction is involved here?

Arial 3 (12pt)

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