What protective gear is required to prevent skin contact and
absorption? – ANSWER- Any clothing from gloves to full suits,
it’s also good to have a safety shower to remove any
contaminants if spilled on you.
Hazardous materials can be accidentally ingested through what
kinds of activities? – ANSWER- Eating, smoking, drinking,
licking fingers to turn pages, and biting fingernails.
Exposure has two different forms: – ANSWER- Acute and
Chronic
Exposure to a hazardous material for very short (minutes) to
relatively long (several days), is known as what? – ANSWERAcute Exposure
Exposure to a hazardous material over several months, years, or
decades, is known as what? – ANSWER- Chronic Exposure
Amount of a hazardous material that is absorbed by the body, is
known as what? – ANSWER- Dose
Doses depend on – ANSWER- concentration/strength of the
material
duration/rate of exposure
frequency of the exposure
There are 2 different types of toxic effects, what are they? –
ANSWER- Local and Systemic
Involves the area of the body in contact with the material –
ANSWER- Local Effect
Involves tissues or organs not directly located at contact point –
ANSWER- Systemic Effect
Concentration in air that is expected to kill 50% of the test
population when administered as a single dose in a specified
time – ANSWER- LC50 (Lethal Concentration 50)
Single dose of a substance that causes the death of 50% of the
test population by and route other than inhalation – ANSWERLD50 (Lethal Dose 50)
Most common estimate of toxicity, usually expressed in mg of
test material per kg of body weight of test animal – ANSWERLD50
Allowable limit for an air contaminant that a worker can be
exposed to without adverse effects – ANSWER- Permissible
Exposure Limit (PEL)
Maximum value which cannot be exceeded (even once) during a
normal workday – ANSWER- Ceiling (C)
Average airborne exposure in any 8 hour shift or 40 hour work
week which cannot be exceeded – ANSWER- Time Weighted
Average (TWA)
15 minute time weighted average exposure which cannot be
exceeded in any part of the workday – ANSWER- Short Term
Exposure Limit (STEL)
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