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Description
Flashcards by Daneca Leatherdale, updated more than 1 year ago
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Created by Daneca Leatherdale
over 7 years ago
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| Question | Answer |
| Name the four hazard groups | -Chemical -Physical -Biological -Egronomic |
| Physical states of chemicals | -Liquids -Solids -Gases -Vapours -Particulates |
| What kind of matter does the term "particulate" describe? | -Dust -Fibres -Nano particles |
| What is the legislated requirement when we are considering worker exposures me multiple chemical hazards? | When we have chemicals that share the same target organ. We assume the additive exposure and we have to add those together using the mixture rule. "Mixture factor equation" |
| What is direct monitoring? | Instant Results Quick and easy Limited in what they can monitor for |
| What is area, shift or personal monitoring? | Where we take a sample of the area being collected on a filter or some sort of medium and is sent to a lab for analysis. |
| What affects the degree of hazard of an agent? | Exposure Potential. |
| Why is dust more hazardous than gravel? | It is easier to inhale. |
| What makes a liquid that off-gases hazardous? | The vapor from the liquid is more likely to be inhaled. |
| Describe the information required to obtain an effective sample | Who, what, when, where, how Remember that you are trying to answer a question concisely. |
| What is grab sampling | Grab sampling is a one shot, whole-sample taken in a suma canister or a tedlar bag, that would be sent to a lab for analysis. |
| What is integrated samplng | Continuous sampling. a sample taken over a single shift if we can't sample for a single shift then we would take it over a few shifts then we would do the Time Waited Average calculation. |
| What is Biotransformation? | The process by which materials are chemically altered to make them easier to eliminate. |
| Define Aerosoles | Suspension of liquid or solid particles (mist, dust, fume, particulate) that are microscopic in size (0.5-10um) allowing them to remain airborne for an extended period of time. |
| Define Dust | Aerosol composed of particles typically caused by abrasion |
| Fumes Definition | Aerosol produced when material in its gaseous phase condenses to form a solid. |
| Gas | Characterized by its lack of defined shape or volume. (A part of the Gas, liquid, solid family) |
| Define Fibers | solid particles with an elongated aspect ratio (>3 to 1 and at lest 5 μm long) generated by handling, crushing, grinding, rapid impact, detonation etc. of fibrous materials such as asbestos, refractory ceramic fibers (RCF) and glass fibers. |
| Define Mist | Aerosol consisting of liquid droplets with diameters in the 40-50 micron size range. |
| Define Nanoparticle | Microscopic particle that is between 1-100um |
| Define Vapour | The term used to describe a substance that is in the gaseous phase but is a liquid or solid at room temperature. |
| Define Teratogens | Toxins that cause abnormal dvelopment or birth defects. |
| What quote is Paracelsus known for? | All substances are poisons. There is none which is not a poison. The right dose differentiates a poison and a remedy. |
| Define LD 50 | is the INGESTED dose that will kill 50% of the population over a specified amount of time. |
| Define LC 50 | is the INHALED dose that will kill 50% of the population over a specified amount of time. |
| What is room temperature described as? | 20 degrees |
| Define Smoke | Mixtures of vapours, gases and particulate |
| How to calculate the weight of liquid when given the density and quantity | mL x Grams/cc |
| Define "Specific Gravity" | The weight of a liquid compared with an equal volume of water. |
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