MFRI HazMat Tech Exam with Accurate
Solutions
Threshold Limit Value/ Time Weighted Average - Correct Answers -Maximum airborne
concentration maybe exposed to 8hrs a day 40hrs a week.
Permissible Exposure Limit - Correct Answers -An OSHA term for the maximum
concentration averaged over 8 hours, to which 95 percent of healthy adults can be
repeatedly exposed for 8 hours per day, 40 hours per week.
Short Term Exposure Limit - Correct Answers -STEL; legal limits established by OSHA
to which workers can be exposed continuously for a short period of time without
damage or injury; exposures at the STEL should not be for more than 15 minutes and
not repeated more than four times per work day.
Threshold Limit Value/ Ceiling - Correct Answers -This is the maximum concentration to
which a health adult can be exposed without risk of injury, and the exposure to higher
concentrations should not occur
Threshold Limit Value Skin - Correct Answers -Indicates the concentration at which
direct exposure or airborne contact with a material could result in possible and
significant exposure by absorption through the skin, mucous membranes, and eyes.
Emergency Response Planning Guidelines ERPG-2 - Correct Answers -The maximum
airborne concentration which is believed all individuals could be exposed for one hour.
Acute Emergency Exposure Guidelines - Correct Answers -Cover five exposure
periods, 10 min, 30 min, 1 hr, 4hr, 8 hrs
LD50 - Correct Answers -A chemical dose lethal to 50 percent of a test population
Lethal Concentration - Correct Answers -Concentration of an inhaled substance that
results in the death of a certain percentage of the test population; the lower the value
the more toxic the substance; an inhalation exposure expressed in parts per million
(ppm), milligrams per liter (mg/liter), or milligrams per cubic meter (mg/m3).
Curie - Correct Answers -a unit of radioactivity equal to the amount of a radioactive
isotope that decays at the rate of 37,000,000,000 disintegrations per second
Solutions
Threshold Limit Value/ Time Weighted Average - Correct Answers -Maximum airborne
concentration maybe exposed to 8hrs a day 40hrs a week.
Permissible Exposure Limit - Correct Answers -An OSHA term for the maximum
concentration averaged over 8 hours, to which 95 percent of healthy adults can be
repeatedly exposed for 8 hours per day, 40 hours per week.
Short Term Exposure Limit - Correct Answers -STEL; legal limits established by OSHA
to which workers can be exposed continuously for a short period of time without
damage or injury; exposures at the STEL should not be for more than 15 minutes and
not repeated more than four times per work day.
Threshold Limit Value/ Ceiling - Correct Answers -This is the maximum concentration to
which a health adult can be exposed without risk of injury, and the exposure to higher
concentrations should not occur
Threshold Limit Value Skin - Correct Answers -Indicates the concentration at which
direct exposure or airborne contact with a material could result in possible and
significant exposure by absorption through the skin, mucous membranes, and eyes.
Emergency Response Planning Guidelines ERPG-2 - Correct Answers -The maximum
airborne concentration which is believed all individuals could be exposed for one hour.
Acute Emergency Exposure Guidelines - Correct Answers -Cover five exposure
periods, 10 min, 30 min, 1 hr, 4hr, 8 hrs
LD50 - Correct Answers -A chemical dose lethal to 50 percent of a test population
Lethal Concentration - Correct Answers -Concentration of an inhaled substance that
results in the death of a certain percentage of the test population; the lower the value
the more toxic the substance; an inhalation exposure expressed in parts per million
(ppm), milligrams per liter (mg/liter), or milligrams per cubic meter (mg/m3).
Curie - Correct Answers -a unit of radioactivity equal to the amount of a radioactive
isotope that decays at the rate of 37,000,000,000 disintegrations per second
