HAZARDOUS MATERIALS

 

HAZARDOUS MATERIALS

 

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Question 1

 

1.       

 

Which of the following statements is INCORRECT regarding Teflon?

 

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An A is sometimes imprinted in the bottommost quadrant of the NFPA hazard diamond posted on the tank in which the substance is stored.

[removed]  

A P is sometimes imprinted in the bottommost quadrant of the NFPA hazard diamond posted on the tank in which the substance is stored.

[removed]  

An inhibitor is added to stabilize the material against autoplymerization.

[removed]  

The storage tank is marked stabilized.

 

 

 

1.       

 

10 points  

 

Question 6

 

1.       

 

Hydrogen cyanide is formed from the combustion of polyurethane and may pose an inhalation hazard. One study of polyurethane combustion indicated that the maximum yield of hydrogen cyanide per gram of polyurethane foam ranged from 0.5 to 1.05 milligrams under flaming conditions. Using this study, what is the possible maximum milligrams of hydrogen cyanide that is formed when 5 kilograms of polyurethane foam is burned during a fire incident? __________.

 

 

 

Question 7

 

1.       

 

The term rubber refers to any of the natural or synthetic polymers having two main properties: deformation under strain and elastic recovery after vul¬canization. These polymers are called __________.

 

 

 

 

 

Question 8

 

1.       

 

A known human carcinogen that is used in the production of polychloroprene is called __________.

 

 

 

 

 

1.       

 

10 points  

 

Question 9

 

1.       

 

A substance that is added to a polymerization tank to prevent or reduce the speed of autopolymerization is called 1) __________. One specific chemical that is used for this purpose is 2) __________.

 

 

 

Question 10

 

1.       

 

At a polymeric fire scene, the gases formed depend on the chemical nature of the polymers that have burned or undergone thermal decomposition. Natural polymers having an animal origin contain proteins which in turn are composed of amino acids. Of concern are two amino acids (methionnc and cysteine) as they produce the toxic gases 1) __________ upon decomposition and 2) __________ upon combustion.

 

 

 

 11

 

 

To most people, a polymer is synonymous with plastic. Technically, there are many different types and uses of plastic. For this discussion board, let us narrow it down to plastic food containers. The most popular or controversial issue that has come up to date is regarding BPA (bisphenol A). BPA is a monomer in some plastics, including polycarbonate. For consumer safety, products must undergo a variety of tests before the U.S. Food and Drug Administration (FDA) will allow the polymer to be used in products that can come in contact with food and drink. Share your thoughts on this topic with the class.