PUBH 4320 FINAL EXAM QUESTIONS AND ANSWERS
100% CORRECT
This HAZWOPER ensemble requires a Totally Encapsulating Chemical Protective (TECP)
suit. - ANSWER Level A
Generally this is the least expensive, most commonly used glove material for protection
against mild solvents. - ANSWER Nitrile rubber
In 2014 some nurses contracted Ebola from exposure while treating a patient with the
disease (the first ever occurrence in the US.) Investigations listed what as the reason for
exposure? - ANSWER Improper doffing (removal) of contaminated PPE
Time for a chemical to pass through the material - ANSWER Breakthrough
Chemical movement through intact (undamaged) material - ANSWER Permeation
Physical breakdown of the material - ANSWER Degradation
Chemical mass flow through a seam in the PPE - ANSWER Penetration
Notation for acute irritants with immediate effects - ANSWER C
,OEL for chemicals with toxicity within a short timeframe - ANSWER STEL
ACGIH TLV notation for known human carcinogens - ANSWER A1
OEL for chemicals with cumulative or chronic toxicity - ANSWER TWA or TWA-8
Publishers of Threshold Limit Values (TLVs) - ANSWER ACGIH
Publishers of Recommended Exposure Limits (RELs) - ANSWER NIOSH
Publishers of Workplace Environmental Exposure Limits (WEELs) - ANSWER AIHA
Publishers of Permissible Exposure Limits (PELs) - ANSWER OSHA
"Skin" notation for a chemical means that the chemical: - ANSWER May be absorbed
through the skin
OSHA generally sets the _______________ at ½ of the 8-hour OEL - ANSWER Action Level
Excursions (moments of high chemical exposure) can occur above the TLV-8 limit as long
, as the exposure stays below the TLV-STEL, has at last 60 minutes between exposures,
and does not occur more than _____ times per work-day. - ANSWER 4
According to the ACGIH, if a chemical only has a TLV-8 listed, what is the maximum
concentration that an employee may ever be exposed to for any period of time? -
ANSWER 5X the TLV-8
The ACGIH sets some limits to be measured via the human body, such as blood lead (Pb)
levels. These limits are called: - ANSWER Biological Exposure Indices (BEI)
An industrial hygiene laboratory reported the analytical determination of 50 micrograms
(0.05 milligrams) of ammonia, NH3, for a solid sorbent tube sample. The industrial
hygienist collected a sample volume of 25 liters.
What is the molecular weight of ammonia? - ANSWER 17
An industrial hygiene laboratory reported the analytical determination of 50 micrograms
(0.05 milligrams) of ammonia, NH3, for a solid sorbent tube sample. The industrial
hygienist collected a sample volume of 25 liters.
What was the exposure for the above scenario, in mg/m3? - ANSWER 2
An industrial hygiene laboratory reported the analytical determination of 50 micrograms
(0.05 milligrams) of ammonia, NH3, for a solid sorbent tube sample. The industrial
hygienist collected a sample volume of 25 liters.
What was the exposure in ppm? (convert your previous answer to ppm) - ANSWER 2.9
100% CORRECT
This HAZWOPER ensemble requires a Totally Encapsulating Chemical Protective (TECP)
suit. - ANSWER Level A
Generally this is the least expensive, most commonly used glove material for protection
against mild solvents. - ANSWER Nitrile rubber
In 2014 some nurses contracted Ebola from exposure while treating a patient with the
disease (the first ever occurrence in the US.) Investigations listed what as the reason for
exposure? - ANSWER Improper doffing (removal) of contaminated PPE
Time for a chemical to pass through the material - ANSWER Breakthrough
Chemical movement through intact (undamaged) material - ANSWER Permeation
Physical breakdown of the material - ANSWER Degradation
Chemical mass flow through a seam in the PPE - ANSWER Penetration
Notation for acute irritants with immediate effects - ANSWER C
,OEL for chemicals with toxicity within a short timeframe - ANSWER STEL
ACGIH TLV notation for known human carcinogens - ANSWER A1
OEL for chemicals with cumulative or chronic toxicity - ANSWER TWA or TWA-8
Publishers of Threshold Limit Values (TLVs) - ANSWER ACGIH
Publishers of Recommended Exposure Limits (RELs) - ANSWER NIOSH
Publishers of Workplace Environmental Exposure Limits (WEELs) - ANSWER AIHA
Publishers of Permissible Exposure Limits (PELs) - ANSWER OSHA
"Skin" notation for a chemical means that the chemical: - ANSWER May be absorbed
through the skin
OSHA generally sets the _______________ at ½ of the 8-hour OEL - ANSWER Action Level
Excursions (moments of high chemical exposure) can occur above the TLV-8 limit as long
, as the exposure stays below the TLV-STEL, has at last 60 minutes between exposures,
and does not occur more than _____ times per work-day. - ANSWER 4
According to the ACGIH, if a chemical only has a TLV-8 listed, what is the maximum
concentration that an employee may ever be exposed to for any period of time? -
ANSWER 5X the TLV-8
The ACGIH sets some limits to be measured via the human body, such as blood lead (Pb)
levels. These limits are called: - ANSWER Biological Exposure Indices (BEI)
An industrial hygiene laboratory reported the analytical determination of 50 micrograms
(0.05 milligrams) of ammonia, NH3, for a solid sorbent tube sample. The industrial
hygienist collected a sample volume of 25 liters.
What is the molecular weight of ammonia? - ANSWER 17
An industrial hygiene laboratory reported the analytical determination of 50 micrograms
(0.05 milligrams) of ammonia, NH3, for a solid sorbent tube sample. The industrial
hygienist collected a sample volume of 25 liters.
What was the exposure for the above scenario, in mg/m3? - ANSWER 2
An industrial hygiene laboratory reported the analytical determination of 50 micrograms
(0.05 milligrams) of ammonia, NH3, for a solid sorbent tube sample. The industrial
hygienist collected a sample volume of 25 liters.
What was the exposure in ppm? (convert your previous answer to ppm) - ANSWER 2.9
