Assignment: Fluid in electrical equipment

Assignment: Fluid in electrical equipment
Assignment: Fluid in electrical equipment
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Which of the following groups of chemicals was widely used as insulating fluid in electrical equipment?
[removed] Dioxins
[removed] Polybrominated diphenyl ethers (PBDEs)
[removed] Polychlorinated biphenyls (PCBs)
1 points
Question 2
Occupational asthma is known to be caused by synthetic organic chemicals, dusts, and _______________.
[removed] alpha radiation
[removed] certain bacteria
[removed] certain metals
1 points
Question 3
Which of the following products are made using processes that involve perfluorochemicals (PFCs)?
[removed] Consumer electronics
[removed] Flexible plastic containers
[removed] Non-stick coatings
1 points
Question 4
The effect of _______________ in inducing _______________ appears to have no threshold.
[removed] lead / neurotoxicity
[removed] methylmercury / decrement in IQ
[removed] particulates / fibrosis
1 points
Question 5
In the United States today, young children get most of their exposure to the lead in lead paint by __________.
[removed] ingesting chips of paint
[removed] ingesting dust that contains lead
[removed] inhaling airborne lead
1 points
Question 6
Which of the following is the most common medium for people’s exposures to solvents?
[removed] Dust
[removed] Groundwater
[removed] Meat or fish
1 points
Question 7
_______________ are the major cause of stratospheric ozone depletion.
[removed] Chlorofluorocarbons (CFCs)
[removed] Perfluorochemicals (PFCs)
[removed] Polybrominated diphenyl ethers (PBDEs)
1 points
Question 8
In the human body, carbon monoxide (CO) _______________.
[removed] binds to hemoglobin, displacing oxygen
[removed] compromises the body’s defenses against airborne particulates
[removed] concentrates in the thyroid, causing thyroid cancer
1 points
Question 9
_______________ are widely used to degrease metals—for example, in the manufacture of electronic components.
[removed] Perfluorochemicals (PFCs)
[removed] Phthalates
[removed] Solvents
1 points
Question 10
Hearing loss is associated not only with exposure to noise, but also with exposure to _________.
[removed] air fresheners
[removed] household pesticides
[removed] secondhand smoke
1 points
Question 11
Which of the following pollutants is a key contributor to acid deposition?
[removed] Carbon dioxide
[removed] Carbon monoxide
[removed] Ozone
[removed] Sulfur dioxide
1 points
Question 12
When automobiles burn gasoline, they:
[removed] emit ozone, which reacts with volatile organic compounds (VOCs) to form photochemical smog.
[removed] emit VOCs, which react with NOx and other chemicals to form photochemical smog.
[removed] increase ozone at ground level, contributing to depletion of ozone in the stratosphere.
1 points
Question 13
Many phthalates affect the _______________.
[removed] central nervous system
[removed] endocrine system
[removed] respiratory system
1 points
Question 14
Sick building syndrome is a set of __________.
[removed] construction features of a building that make people feel ill
[removed] indoor air pollutants associated with construction materials
[removed] symptoms that people experience when they spend time in a building
1 points
Question 15
Some likely human health impacts of polybrominated diphenyl ethers (PBDEs) are suggested by their chemical structure, which is similar to that of _______________.
[removed] human growth hormone
[removed] neurotransmitters
[removed] thyroid hormones