Question 1
- Atrazine is one of the most widely used agricultural pesticides in the U.S. that may be applied before and after planting to control broadleaf and grassy weeds. It is used primarily on corn, sorghum, sugarcane, Christmas trees, and other crops. If the oral LD50 of Atrazine is 2,000 mg/kg, what is the oral lethal dose in ounces of this pesticide for a 190-lb pesticide applicator?
| 12 | ||
| 8 | ||
| 6 | ||
| 4 |
Question 2
WRITE THIS ESSAY FOR ME
Tell us about your assignment and we will find the best writer for your paper.
Get Help Now!- Using a pulse CO-oximeter, a paramedic establishes that the blood of an on-duty fire fighter contains carboxyhemoglobin at a concentration of 55,000 ppm by volume. What would be the symptoms?
| No symptoms | ||
| Fainting, increased respiration and pulse, coma with intermittent convulsions | ||
| Possible death | ||
| Respiratory failure and death |
Question 3
- Below is a list of chemicals with their oral LD50 in mg/kg (rats). Select the substance that is MOST toxic to rats.
| DDT, 87 mg/kg | ||
| malathion, 885 mg/kg | ||
| carbaryl (sevin), 307 mg/kg | ||
| parathion, 3 mg/kg |
Question 4
- Which health effect is manifested when an injury or disease occurs only after an extensive period of time?
| acute | ||
| chronic | ||
| latent | ||
| no effect |
The OSHA regulation at 29 C.F.R. §1910.1000(d) requires employers to determine the cumulative exposure of workers to certain gases over an 8-hr work shift using the following formula:
E = CaTa + CbTb + …. + CnTn
8
E is the equivalent exposure for the work shift,
C is the concentration during any period of time in which the concentration remains constant, and
T is the duration of time in hours of the exposure.
The regulation further stipulates that no employee can be further exposed to the gas when the value of E exceeds the 8-hr time-weighted average limit set for the given substance. If a worker is exposed to ammonia concentrations throughout the workday as follows, 125 ppm for 4 hr; 75 ppm for 2 hr; and 25 ppm for 2 hr, determine the equivalent exposure (E):
| 28. | ||
| 75. | ||
| 88. | ||
| 90. |
Introducing our Online Essay Writing Services Agency, where you can confidently place orders for a wide range of academic assignments. Our reputable homework writing company specializes in crafting essays, term papers, research papers, capstone projects, movie reviews, presentations, annotated bibliographies, reaction papers, research proposals, discussions, and various other assignments. Rest assured, our content is guaranteed to be 100% original, as every piece is meticulously written from scratch. Say goodbye to concerns about plagiarism and trust us to deliver authentic and high-quality work.
WRITE MY ESSAY NOW
