1|Page
HAZMAT PRO BOARD PRE TEST QUESTIONS
AND ANSWERS 2025
Chemical Abstracts Service (CAS) - .....ANSWER... ✔✔
Databases on chemical information
SIN - .....ANSWER... ✔✔ Safety, isolate, notify
Safety - .....ANSWER... ✔✔ Stay upwind, uphill,
understand factors influencing release, and make
positive identification of rleased substance.
Isolate - .....ANSWER... ✔✔ Deny entry to scene,
establish hot zone, separate people from problem
Notify - .....ANSWER... ✔✔ Keep current and
comprehensive contact list of local state and federal
resources
,2|Page
Indicators - .....ANSWER... ✔✔ Include information
from initial dispatch, knowledge of response area, and
clues seen or heard
Detection - .....ANSWER... ✔✔ Is guided by SOPs,
level of training, and information gathering at scene
Dewar container - .....ANSWER... ✔✔ Used for
storing cold liquids
Stainless steel containers - .....ANSWER... ✔✔ May
hold dangerous chemicals
Drums - .....ANSWER... ✔✔ Barrel-like containers used
to store food grade materials, corrosives, flammable
liquids, and grease
How is the construction of drums determined? -
.....ANSWER... ✔✔ The nature of chemical dictates
construction
Closed-head drums - .....ANSWER... ✔✔ Permanently
attached lid that can only be removed with bung wrench
,3|Page
Bungs - .....ANSWER... ✔✔ Openings on a drum lid
Open-head drum - .....ANSWER... ✔✔ Removeable
lid fastened to drum with ring
Carboys - .....ANSWER... ✔✔ Glass, plastic, or steel
container that holds 5 to 15 gallons of product
Cylinders - .....ANSWER... ✔✔ Stores gas substances
and has variable internal pressures
What is the danger of cylinders? - .....ANSWER... ✔✔
High pressure
Propane cylinder - .....ANSWER... ✔✔ Low pressure
cylinder that contains liquefied gas and subject to BLEVE
BLEVE - .....ANSWER... ✔✔ Boiling Liquid Expanding
Vapor Explosion
, 4|Page
When does BLEVE occur? - .....ANSWER... ✔✔ Over
pressurization of a liquid container caused by an
external heat source
When do cryogens pose a threat? - .....ANSWER...
✔✔ If the Dewear container fails to maintain a low
temperature
Two pressure relief devices of cylinders - .....ANSWER...
✔✔ Pressure relief valve and frangible metal disk
What is the distinct shape of the NFPA 704 marking
system? - .....ANSWER... ✔✔ Diamond
Where are NFPA 704 placards found? - .....ANSWER...
✔✔ The outside of buildings, doorways to chemical
storage areas, and fixed storage tanks
How are NFPA 704 diamonds rated? - .....ANSWER...
✔✔ A range of 0-4
What does a blue diamond represent? - .....ANSWER...
✔✔ Health hazard
HAZMAT PRO BOARD PRE TEST QUESTIONS
AND ANSWERS 2025
Chemical Abstracts Service (CAS) - .....ANSWER... ✔✔
Databases on chemical information
SIN - .....ANSWER... ✔✔ Safety, isolate, notify
Safety - .....ANSWER... ✔✔ Stay upwind, uphill,
understand factors influencing release, and make
positive identification of rleased substance.
Isolate - .....ANSWER... ✔✔ Deny entry to scene,
establish hot zone, separate people from problem
Notify - .....ANSWER... ✔✔ Keep current and
comprehensive contact list of local state and federal
resources
,2|Page
Indicators - .....ANSWER... ✔✔ Include information
from initial dispatch, knowledge of response area, and
clues seen or heard
Detection - .....ANSWER... ✔✔ Is guided by SOPs,
level of training, and information gathering at scene
Dewar container - .....ANSWER... ✔✔ Used for
storing cold liquids
Stainless steel containers - .....ANSWER... ✔✔ May
hold dangerous chemicals
Drums - .....ANSWER... ✔✔ Barrel-like containers used
to store food grade materials, corrosives, flammable
liquids, and grease
How is the construction of drums determined? -
.....ANSWER... ✔✔ The nature of chemical dictates
construction
Closed-head drums - .....ANSWER... ✔✔ Permanently
attached lid that can only be removed with bung wrench
,3|Page
Bungs - .....ANSWER... ✔✔ Openings on a drum lid
Open-head drum - .....ANSWER... ✔✔ Removeable
lid fastened to drum with ring
Carboys - .....ANSWER... ✔✔ Glass, plastic, or steel
container that holds 5 to 15 gallons of product
Cylinders - .....ANSWER... ✔✔ Stores gas substances
and has variable internal pressures
What is the danger of cylinders? - .....ANSWER... ✔✔
High pressure
Propane cylinder - .....ANSWER... ✔✔ Low pressure
cylinder that contains liquefied gas and subject to BLEVE
BLEVE - .....ANSWER... ✔✔ Boiling Liquid Expanding
Vapor Explosion
, 4|Page
When does BLEVE occur? - .....ANSWER... ✔✔ Over
pressurization of a liquid container caused by an
external heat source
When do cryogens pose a threat? - .....ANSWER...
✔✔ If the Dewear container fails to maintain a low
temperature
Two pressure relief devices of cylinders - .....ANSWER...
✔✔ Pressure relief valve and frangible metal disk
What is the distinct shape of the NFPA 704 marking
system? - .....ANSWER... ✔✔ Diamond
Where are NFPA 704 placards found? - .....ANSWER...
✔✔ The outside of buildings, doorways to chemical
storage areas, and fixed storage tanks
How are NFPA 704 diamonds rated? - .....ANSWER...
✔✔ A range of 0-4
What does a blue diamond represent? - .....ANSWER...
✔✔ Health hazard
