NON-SOIL FUMIGATION PT.1
(CHAPTERS 1-4) EXAM QUESTIONS AND
ANSWERS 100% PASS.
Volatility - ANS How easily a substance will vaporize
What makes volatility increase - ANS A rise in temperature
What is vapor pressure? - ANS the pressure of a vapor in contact with its liquid or solid form.
Fumigants with high Vapor Pressure tend to? - ANS Have better fumigation qualities due to
their high concentration
What is the boiling point - ANS The temperature at which a liquid changes to a gas (212
degrees F)
The higher the boiling point... - ANS The lower the vapor pressure and slower a fumigation
turns into gas
methyl bromide - ANS low boiling point (gas at room temperature)
comes as a liquid in pressurized cylinders.
Vaporizes at temp > 38.5
3.28 times heavier than air
2026 STUDY MATERIAL @COPYRIGHT RESERVED 1
, Tends to stratify so fast are needed for even spreading
Being phased put due to pollution on ozone
requires oversight from (USDA-APHIS)
can use in any fumigation
When shouldn't you use Methyl Bromide for fumigation? - ANS If moisture levels are too high
or if temperatures are below 40° F
Phosphine - ANS generated from solid formulations of aluminum phosphide or magnesium
phosphide
no allowed use in residential areas due to leaking tendency
must be 100 feet from any building where people are
ineffective below 40° F
When can't you use Phosphide as a fumigant? - ANS When goods are undergoing fumigation
with aluminum phosphide in a truck trailer or container that have not been completely aerated,
cannot be transported over Publix roads/highways
Phosphine precautions - ANS Fire/Explosion can occur if produced too quickly
(phosphine mixed w/CO2 is not flammable)
Explosive under vacuum conditions(never use in chamber fumigation)
T/F Aluminum Phosphide can explode if it has extended contact with water - ANS True
The risk of fire or explosion in Aluminum phosphide also applies to? - ANS Magnesium
phosphide
Describe phosphine gases chemical reactivity w copper containing equipment - ANS In the
presence of moisture or ammonia copper can be severely damaged by phosphine.
2026 STUDY MATERIAL @COPYRIGHT RESERVED 2
(CHAPTERS 1-4) EXAM QUESTIONS AND
ANSWERS 100% PASS.
Volatility - ANS How easily a substance will vaporize
What makes volatility increase - ANS A rise in temperature
What is vapor pressure? - ANS the pressure of a vapor in contact with its liquid or solid form.
Fumigants with high Vapor Pressure tend to? - ANS Have better fumigation qualities due to
their high concentration
What is the boiling point - ANS The temperature at which a liquid changes to a gas (212
degrees F)
The higher the boiling point... - ANS The lower the vapor pressure and slower a fumigation
turns into gas
methyl bromide - ANS low boiling point (gas at room temperature)
comes as a liquid in pressurized cylinders.
Vaporizes at temp > 38.5
3.28 times heavier than air
2026 STUDY MATERIAL @COPYRIGHT RESERVED 1
, Tends to stratify so fast are needed for even spreading
Being phased put due to pollution on ozone
requires oversight from (USDA-APHIS)
can use in any fumigation
When shouldn't you use Methyl Bromide for fumigation? - ANS If moisture levels are too high
or if temperatures are below 40° F
Phosphine - ANS generated from solid formulations of aluminum phosphide or magnesium
phosphide
no allowed use in residential areas due to leaking tendency
must be 100 feet from any building where people are
ineffective below 40° F
When can't you use Phosphide as a fumigant? - ANS When goods are undergoing fumigation
with aluminum phosphide in a truck trailer or container that have not been completely aerated,
cannot be transported over Publix roads/highways
Phosphine precautions - ANS Fire/Explosion can occur if produced too quickly
(phosphine mixed w/CO2 is not flammable)
Explosive under vacuum conditions(never use in chamber fumigation)
T/F Aluminum Phosphide can explode if it has extended contact with water - ANS True
The risk of fire or explosion in Aluminum phosphide also applies to? - ANS Magnesium
phosphide
Describe phosphine gases chemical reactivity w copper containing equipment - ANS In the
presence of moisture or ammonia copper can be severely damaged by phosphine.
2026 STUDY MATERIAL @COPYRIGHT RESERVED 2
