Benzene, toluene, and xylene (commonly known as BTX) are the three...

1. Benzene, toluene, and xylene (commonly known as BTX) are the three most commonly encountered aromatic hydrocarbons. Which of the BTX compounds is the least volatile at 68^°F?
2. Xylene
3. Toluene
4. Benzene
5. All the same

6 points  

QUESTION 2

1. Assume that a small fire has erupted within a warehouse that had open containers of liquid chemicals, which are listed below. When using water to extinguish the fire, select which liquid chemical fire is most likely to be extinguished first.
2. TolueneAcetoneCarbon disulfideKerosene

6 points  

QUESTION 3

1. Natural polymers such as leather and wool contain amino acids. At fire scenes, they can thermally decompose to produce which of the following?
2. Sulfur dioxide and ammoniaHydrogen sulfide and sulfur dioxideCarbon monoxide and ammoniaHydrogen sulfide and ammonia                         

6 points  

QUESTION 4

1. Methane, which is a flammable gas, is the main component of natural gas. Identify another health hazard associated with methane.
2. asphyxiantirritantgreenhouse gascarcinogen       

6 points  

QUESTION 5

1. All hydrocarbons are divided into aliphatic and aromatic hydrocarbons. Select which of the following compound is considered an aromatic hydrocarbon.
2. MethaneNaphthaleneAcetyleneDichloromethane

6 points  

QUESTION 6

1. Polynuclear aromatic hydrocarbons (PAHs) are a group of structurally similar hydrocarbons, and their molecules have two or more mutually fused benzene rings. Select which of the following statements about PAHs is not true.
2. PAHs are found in diesel engine exhaust.PAHs are classified as semi-volatile organic compounds.PAHs are found in soot particulates at fire scenes.PAHs are found only outdoors.

6 points  

QUESTION 7

1. Autopolymerization of a substance within a container could result in an increase in pressure that can rupture the container. Select which compound can prevent autopolymerization of a gaseous substance.
2. tert-ButylhydroquinoneCarbon monoxideCarbon dioxideNitric oxide

6 points  

QUESTION 8

1. According to the Environmental Protection Agency (EPA), the highest levels of airborne formaldehyde have been detected in indoor air, where it is released from various consumer items such as cleaning products and building materials. If somebody is experiencing nasal and eye irritation, eczema, and change in pulmonary function, what concentration of formaldehyde in the air is that person exposed to?
2. 0.2 ppm
3. 1.0 ppm
4. 2.0 ppm
5. Lower than 0.6 ppm

6 points  

QUESTION 9

1. Phenol is an organic compound that is used to make bisphenol A (commonly known as BPA used in coating food containers). Identify the functional group of phenol that gives this compound its characteristics.
2. C=Ccarbonylhydroxyl          carboxyl

6 points  

QUESTION 10

1. Polychlorinated biphenyls (PCBs) are chlorinated organic compounds that have been manufactured and marketed all over the world from the 1930s until the 1970s when they were found to cause cancer, birth defects, and liver damage. Choose which of the following statements regarding PCBs is not true.
2. PCB is a constituent in certain plastics, paint, and rubber products.PCB is an organochlorine pesticide that is now banned in the United States.PCB fires are characterized by oily and black soot.PCB containing equipment is still in use today.