VA VDFP HAZMAT AWARENESS & OPS TEST STUDY GUIDE WITH 127
QUESTIONS AND ANSWERS 2026 GUARANTEED PASS
Spherical dispersion
Radiating away from a point source in all directions at the same time
Hemispherical dispersion
Like a spherical release but occurs at ground level
Cloud dispersion pattern
Aka circular, seen when gas released with little or no air movement.
It hangs or stays in the area
Plume dispersion
Release driven by pressure and is carried away by air currents
Cone shape dispersion
A conical pattern is usually associated with release of energy. Pattern
is linear and radial expansion of the exposure area as energy moves
away from release point
,Stream dispersion
A liquid pattern where movement of liquid product is a down slope
due to gravity
Pool pattern
Collection of liquid product in low lying areas
Impingement time frames
Short term = seconds or hours
Medium term = days or months
Long term = months or years
High temp proximity suits
Use in up to 400 degrees. Used in aircraft ff. Like bunker gear with
aluminum covering
Fire entry suits
Used in up to 2000 degrees for up to 60 seconds.
, Level A suits
Vapor tight, encapsulated single piece. SCBA or SAR
Level B suits
Liquid splash protection, usually non-encapsulated, single or two
piece. SCBA or SAR
Level C suit
Liquid splash protection, not vapor tight, APR, PAPR or Particulates
mask
Level D suit
Regular station clothes, no breathing protection
NFPA 1991
Standard on vapor protective suits for hazardous chemical
emergencies
NFPA 1992
QUESTIONS AND ANSWERS 2026 GUARANTEED PASS
Spherical dispersion
Radiating away from a point source in all directions at the same time
Hemispherical dispersion
Like a spherical release but occurs at ground level
Cloud dispersion pattern
Aka circular, seen when gas released with little or no air movement.
It hangs or stays in the area
Plume dispersion
Release driven by pressure and is carried away by air currents
Cone shape dispersion
A conical pattern is usually associated with release of energy. Pattern
is linear and radial expansion of the exposure area as energy moves
away from release point
,Stream dispersion
A liquid pattern where movement of liquid product is a down slope
due to gravity
Pool pattern
Collection of liquid product in low lying areas
Impingement time frames
Short term = seconds or hours
Medium term = days or months
Long term = months or years
High temp proximity suits
Use in up to 400 degrees. Used in aircraft ff. Like bunker gear with
aluminum covering
Fire entry suits
Used in up to 2000 degrees for up to 60 seconds.
, Level A suits
Vapor tight, encapsulated single piece. SCBA or SAR
Level B suits
Liquid splash protection, usually non-encapsulated, single or two
piece. SCBA or SAR
Level C suit
Liquid splash protection, not vapor tight, APR, PAPR or Particulates
mask
Level D suit
Regular station clothes, no breathing protection
NFPA 1991
Standard on vapor protective suits for hazardous chemical
emergencies
NFPA 1992
