24 HAZWOPER EXAM QUESTIONS AND
ASNWERS
What are fumes? - ANSWER -Solid particles generated by condensation from the vapor
state of a liquid or solid
What is Dust? - ANSWER -Solids particles generated by:
Crushing
Handling
Grinding
Impact
What is mist? - ANSWER -Dispersion of finely divided liquid suspended in the
atmosphere
What is smoke? - ANSWER -Carbon or soot particles left from incomplete combustion
What is fog? - ANSWER -Visible aerosols formed by condensation of gases or vapors
What are hazardous atmospheres? - ANSWER -Oxygen deficient
Explosive/flammable
Chemical exposure
Radioactive
What does IDLH stand for? - ANSWER -Immediately Dangerous to Life or Health
What % is considered oxygen deficient? - ANSWER -<19.5%
What is toxicology? - ANSWER -Study of adverse effects of chemicals on living
organisms
What are the 4 types of "routes of entry"? - ANSWER -Inhalation
Ingestion
Absorption
Injection
What is the most rapid and direct avenue of entry? - ANSWER -Inhalation
What is a hazardous atmosphere? - ANSWER -Any atmosphere capable of producing
adverse health effects or containing contaminants in concentrations above regulatory
standards
What is Gases? - ANSWER -Perfect molecular mobility and property of indefinite
expansion
, What is vapors? - ANSWER -Gaseous state that is liquid or solid under ordinary
conditions
What is boiling point? - ANSWER -Temp at which vapor pressure of a liquid equals
external pressure surrounding the liquid allowing vapors to escape into atmosphere
What is vapor pressure? - ANSWER -Pressure exerted by a gas, above its liquid phase,
at temp below the boiling point
What is vapor density at <1.0? - ANSWER -Gases/vapors will rise
What is vapor density at >1.0? - ANSWER -Gases/vapors will sink
What is LD 50? - ANSWER -Lethal Dose for 50% of test subjects (solids and liquids)
What is LC 50? - ANSWER -Lethal Concentration for 50% of test subjects (airborne
concentrations)
What is a LOCAL hazardous effect? - ANSWER -Effects occur at the site of first contact
What is SYSTEMIC hazardous effect? - ANSWER -Effects can occur at a remote site
removed from point of entry
What is a teratogen? - ANSWER -A substance that produces malformations of the fetus
without inducing damage to the mother or killing the fetus
What are external exposure monitoring? - ANSWER -EPD, TLD, and CND
What is OSHA PEL noise exposure? - ANSWER -90 dB(A) 8hr TWA
Wet Bulb Globe Temperature (WBGT) is calculated and takes into account: - ANSWER
-Ambient temp
Humidity
Solar load
Wind speed
What is the ceiling value? - ANSWER -Concentration which is never to be exceeded
What is a hazard? - ANSWER -Existing or potential conditions whose occurrence can
result in a mishap
What is a mishap? - ANSWER -An event or series of events, that results in:
Injury, illness, or death
Damage or loss to property
Environment harm
ASNWERS
What are fumes? - ANSWER -Solid particles generated by condensation from the vapor
state of a liquid or solid
What is Dust? - ANSWER -Solids particles generated by:
Crushing
Handling
Grinding
Impact
What is mist? - ANSWER -Dispersion of finely divided liquid suspended in the
atmosphere
What is smoke? - ANSWER -Carbon or soot particles left from incomplete combustion
What is fog? - ANSWER -Visible aerosols formed by condensation of gases or vapors
What are hazardous atmospheres? - ANSWER -Oxygen deficient
Explosive/flammable
Chemical exposure
Radioactive
What does IDLH stand for? - ANSWER -Immediately Dangerous to Life or Health
What % is considered oxygen deficient? - ANSWER -<19.5%
What is toxicology? - ANSWER -Study of adverse effects of chemicals on living
organisms
What are the 4 types of "routes of entry"? - ANSWER -Inhalation
Ingestion
Absorption
Injection
What is the most rapid and direct avenue of entry? - ANSWER -Inhalation
What is a hazardous atmosphere? - ANSWER -Any atmosphere capable of producing
adverse health effects or containing contaminants in concentrations above regulatory
standards
What is Gases? - ANSWER -Perfect molecular mobility and property of indefinite
expansion
, What is vapors? - ANSWER -Gaseous state that is liquid or solid under ordinary
conditions
What is boiling point? - ANSWER -Temp at which vapor pressure of a liquid equals
external pressure surrounding the liquid allowing vapors to escape into atmosphere
What is vapor pressure? - ANSWER -Pressure exerted by a gas, above its liquid phase,
at temp below the boiling point
What is vapor density at <1.0? - ANSWER -Gases/vapors will rise
What is vapor density at >1.0? - ANSWER -Gases/vapors will sink
What is LD 50? - ANSWER -Lethal Dose for 50% of test subjects (solids and liquids)
What is LC 50? - ANSWER -Lethal Concentration for 50% of test subjects (airborne
concentrations)
What is a LOCAL hazardous effect? - ANSWER -Effects occur at the site of first contact
What is SYSTEMIC hazardous effect? - ANSWER -Effects can occur at a remote site
removed from point of entry
What is a teratogen? - ANSWER -A substance that produces malformations of the fetus
without inducing damage to the mother or killing the fetus
What are external exposure monitoring? - ANSWER -EPD, TLD, and CND
What is OSHA PEL noise exposure? - ANSWER -90 dB(A) 8hr TWA
Wet Bulb Globe Temperature (WBGT) is calculated and takes into account: - ANSWER
-Ambient temp
Humidity
Solar load
Wind speed
What is the ceiling value? - ANSWER -Concentration which is never to be exceeded
What is a hazard? - ANSWER -Existing or potential conditions whose occurrence can
result in a mishap
What is a mishap? - ANSWER -An event or series of events, that results in:
Injury, illness, or death
Damage or loss to property
Environment harm
