CMCB HAZMAT COMPLETE EXAM QUESTIONS AND 100%
VERIFIED ANSWERS (NEWEST) PASS GUARANTEE
1. Q: What does HAZMAT stand for? ANSWER Hazardous Materials -
substances or materials capable of posing unreasonable risk to health, safety, or
property.
2. Q: What are the nine hazard classes defined by DOT? ANSWER Class 1:
Explosives; Class 2: Gases; Class 3: Flammable Liquids; Class 4: Flammable
Solids; Class 5: Oxidizers and Organic Peroxides; Class 6: Toxic and Infectious
Substances; Class 7: Radioactive Materials; Class 8: Corrosives; Class 9:
Miscellaneous.
3. Q: What is a placard? ANSWER A diamond-shaped warning sign
displayed on vehicles, railcars, or containers carrying hazardous materials,
indicating the hazard class.
4. Q: What size must placards be? ANSWER Placards must be at least 10.8
inches (273 mm) on each side.
5. Q: What is the Emergency Response Guidebook (ERG)? ANSWER A
guidebook for first responders providing information on hazardous materials
response procedures and safety measures.
6. Q: What are the three types of information in the ERG? ANSWER
Yellow pages (numerical ID index), Blue pages (alphabetical name index), and
Orange pages (response guides).
7. Q: What is a UN number? ANSWER A four-digit United Nations
identification number assigned to hazardous materials for shipping purposes.
8. Q: What does SDS stand for? ANSWER Safety Data Sheet - a document
containing information about chemical properties and hazards.
9. Q: How many sections are in an SDS? ANSWER 16 sections covering
identification, hazards, composition, first aid, fire-fighting, handling, and more.
,10. Q: What is OSHA's role in HAZMAT? ANSWER Occupational Safety
and Health Administration regulates workplace safety including handling of
hazardous materials.
11. Q: What is EPA's role in HAZMAT? ANSWER Environmental
Protection Agency regulates environmental impact and cleanup of hazardous
material releases.
12. Q: What does DOT stand for in HAZMAT context? ANSWER
Department of Transportation - regulates transportation of hazardous materials.
13. Q: What is CERCLA? ANSWER Comprehensive Environmental
Response, Compensation, and Liability Act - federal superfund law for
hazardous substance cleanup.
14. Q: What is SARA? ANSWER Superfund Amendments and
Reauthorization Act - amended CERCLA and created emergency planning
requirements.
15. Q: What is EPCRA? ANSWER Emergency Planning and Community
Right-to-Know Act - requires facilities to report chemical inventories to
communities.
16. Q: What is a release in HAZMAT terms? ANSWER Any spilling,
leaking, pumping, emitting, or disposing of hazardous materials into the
environment.
17. Q: What is the Reportable Quantity (RQ)? ANSWER The minimum
quantity of a hazardous substance that requires reporting to authorities if
released.
18. Q: What does PPE stand for? ANSWER Personal Protective Equipment -
clothing and equipment worn to minimize exposure to hazards.
19. Q: What are the four levels of PPE? ANSWER Level A (highest
protection), Level B, Level C, and Level D (lowest protection).
20. Q: What is Level A protection? ANSWER Fully encapsulated vapor-tight
suit with SCBA, providing maximum respiratory and skin protection.
Chemical Properties
21. Q: What is pH? ANSWER A measure of acidity or alkalinity on a scale of
0-14, with 7 being neutral.
22. Q: What pH range indicates an acid? ANSWER pH less than 7.
, 23. Q: What pH range indicates a base/alkali? ANSWER pH greater than 7.
24. Q: What is flash point? ANSWER The lowest temperature at which a
liquid gives off enough vapor to ignite in the presence of an ignition source.
25. Q: What is autoignition temperature? ANSWER The minimum
temperature at which a substance will spontaneously ignite without an external
ignition source.
26. Q: What is vapor pressure? ANSWER The pressure exerted by a vapor in
equilibrium with its liquid at a given temperature.
27. Q: What is vapor density? ANSWER The weight of a vapor or gas
compared to air (air = 1).
28. Q: What does a vapor density greater than 1 indicate? ANSWER The
vapor is heavier than air and will sink/collect in low areas.
29. Q: What does a vapor density less than 1 indicate? ANSWER The vapor
is lighter than air and will rise.
30. Q: What is specific gravity? ANSWER The weight of a liquid compared to
water (water = 1).
31. Q: What does a specific gravity less than 1 indicate? ANSWER The
substance will float on water.
32. Q: What does a specific gravity greater than 1 indicate? ANSWER The
substance will sink in water.
33. Q: What is boiling point? ANSWER The temperature at which a liquid
changes to vapor throughout the liquid.
34. Q: What is the Lower Explosive Limit (LEL)? ANSWER The minimum
concentration of vapor in air that will support combustion.
35. Q: What is the Upper Explosive Limit (UEL)? ANSWER The maximum
concentration of vapor in air that will support combustion.
36. Q: What is water solubility? ANSWER The ability of a substance to
dissolve in water.
37. Q: What is viscosity? ANSWER The resistance of a fluid to flow -
thickness of a liquid.
38. Q: What is volatility? ANSWER The tendency of a substance to vaporize.
VERIFIED ANSWERS (NEWEST) PASS GUARANTEE
1. Q: What does HAZMAT stand for? ANSWER Hazardous Materials -
substances or materials capable of posing unreasonable risk to health, safety, or
property.
2. Q: What are the nine hazard classes defined by DOT? ANSWER Class 1:
Explosives; Class 2: Gases; Class 3: Flammable Liquids; Class 4: Flammable
Solids; Class 5: Oxidizers and Organic Peroxides; Class 6: Toxic and Infectious
Substances; Class 7: Radioactive Materials; Class 8: Corrosives; Class 9:
Miscellaneous.
3. Q: What is a placard? ANSWER A diamond-shaped warning sign
displayed on vehicles, railcars, or containers carrying hazardous materials,
indicating the hazard class.
4. Q: What size must placards be? ANSWER Placards must be at least 10.8
inches (273 mm) on each side.
5. Q: What is the Emergency Response Guidebook (ERG)? ANSWER A
guidebook for first responders providing information on hazardous materials
response procedures and safety measures.
6. Q: What are the three types of information in the ERG? ANSWER
Yellow pages (numerical ID index), Blue pages (alphabetical name index), and
Orange pages (response guides).
7. Q: What is a UN number? ANSWER A four-digit United Nations
identification number assigned to hazardous materials for shipping purposes.
8. Q: What does SDS stand for? ANSWER Safety Data Sheet - a document
containing information about chemical properties and hazards.
9. Q: How many sections are in an SDS? ANSWER 16 sections covering
identification, hazards, composition, first aid, fire-fighting, handling, and more.
,10. Q: What is OSHA's role in HAZMAT? ANSWER Occupational Safety
and Health Administration regulates workplace safety including handling of
hazardous materials.
11. Q: What is EPA's role in HAZMAT? ANSWER Environmental
Protection Agency regulates environmental impact and cleanup of hazardous
material releases.
12. Q: What does DOT stand for in HAZMAT context? ANSWER
Department of Transportation - regulates transportation of hazardous materials.
13. Q: What is CERCLA? ANSWER Comprehensive Environmental
Response, Compensation, and Liability Act - federal superfund law for
hazardous substance cleanup.
14. Q: What is SARA? ANSWER Superfund Amendments and
Reauthorization Act - amended CERCLA and created emergency planning
requirements.
15. Q: What is EPCRA? ANSWER Emergency Planning and Community
Right-to-Know Act - requires facilities to report chemical inventories to
communities.
16. Q: What is a release in HAZMAT terms? ANSWER Any spilling,
leaking, pumping, emitting, or disposing of hazardous materials into the
environment.
17. Q: What is the Reportable Quantity (RQ)? ANSWER The minimum
quantity of a hazardous substance that requires reporting to authorities if
released.
18. Q: What does PPE stand for? ANSWER Personal Protective Equipment -
clothing and equipment worn to minimize exposure to hazards.
19. Q: What are the four levels of PPE? ANSWER Level A (highest
protection), Level B, Level C, and Level D (lowest protection).
20. Q: What is Level A protection? ANSWER Fully encapsulated vapor-tight
suit with SCBA, providing maximum respiratory and skin protection.
Chemical Properties
21. Q: What is pH? ANSWER A measure of acidity or alkalinity on a scale of
0-14, with 7 being neutral.
22. Q: What pH range indicates an acid? ANSWER pH less than 7.
, 23. Q: What pH range indicates a base/alkali? ANSWER pH greater than 7.
24. Q: What is flash point? ANSWER The lowest temperature at which a
liquid gives off enough vapor to ignite in the presence of an ignition source.
25. Q: What is autoignition temperature? ANSWER The minimum
temperature at which a substance will spontaneously ignite without an external
ignition source.
26. Q: What is vapor pressure? ANSWER The pressure exerted by a vapor in
equilibrium with its liquid at a given temperature.
27. Q: What is vapor density? ANSWER The weight of a vapor or gas
compared to air (air = 1).
28. Q: What does a vapor density greater than 1 indicate? ANSWER The
vapor is heavier than air and will sink/collect in low areas.
29. Q: What does a vapor density less than 1 indicate? ANSWER The vapor
is lighter than air and will rise.
30. Q: What is specific gravity? ANSWER The weight of a liquid compared to
water (water = 1).
31. Q: What does a specific gravity less than 1 indicate? ANSWER The
substance will float on water.
32. Q: What does a specific gravity greater than 1 indicate? ANSWER The
substance will sink in water.
33. Q: What is boiling point? ANSWER The temperature at which a liquid
changes to vapor throughout the liquid.
34. Q: What is the Lower Explosive Limit (LEL)? ANSWER The minimum
concentration of vapor in air that will support combustion.
35. Q: What is the Upper Explosive Limit (UEL)? ANSWER The maximum
concentration of vapor in air that will support combustion.
36. Q: What is water solubility? ANSWER The ability of a substance to
dissolve in water.
37. Q: What is viscosity? ANSWER The resistance of a fluid to flow -
thickness of a liquid.
38. Q: What is volatility? ANSWER The tendency of a substance to vaporize.
