CATEGORY 11 AERIAL APPLICATION
TEST FINAL EXAM 2026 UPDATE
QUESTIONS AND CORRECT VERIFIED
ANSWERS ALREADY GRADED A+
(BRAND NEW VISION)
VMD can also be used to describe in simpler terms? - ANS-The "spread"
of droplet sizes in a given droplet spectrum.
Settling velocity is what? - ANS-The rate at which a spray droplet
falls through the air toward the ground.
Another term for settling velocity is? - ANS-Fall Rate
Settling velocity is generally roughly proportional to what? - ANS-The
square of a droplets diameter.
The settling velocity of a 200 micron droplet is? - ANS-231 feet/minute
The settling velocity of a 20 micron droplet is - ANS-2.4 feet/minute
What can you adjust to alter spray droplet size? - ANS--Nozzle type
-Orifice diameter
-Spray pattern angle
-Travel speed
-Spray pressure
-Nozzle mounting angle
,What are a few of the common nozzle types used in aerial application? -
ANS--Cone
-Fan
-Straight stream
-Rotary atomizers
Which spray pattern angle is less likely to create drift prone droplets, 80 or
110 degree? - ANS-80 degree
Which spray pattern is less likely to produce drift prone droplets, conical or
fan? - ANS-Fan pattern
What influence does air shear have on spray droplets? - ANS-Causes
droplets to collide with each other an break up, creating a greater
number of drift prone droplets.
How should nozzles be angled to avoid disruption by air shear? - ANS-In
the same direction as the air flow, generally straight back for a
fixed wing aircraft.
When applying pesticides aerially, what can you do to create the lest drift
possible? - ANS-Apply using the slowest speed you can safely
operate at.
Increasing spray pressure causes what? - ANS--Spray droplets to
become smaller
-A larger proportion of the spray to become drift prone
To double your spray output using pressure, what sort of increase to pump
pressure must you have? - ANS-The pressure must be quadrupled
What other options do aerial applicators have to alter spray output? -
ANS--Change in travel speed
,-Change in nozzle tips
"Operational Guidelines" is a catch all category for what? - ANS-Spray
system features that you can manipulate to manage the size of
spray droplets, including:
-Rotation rate of rotary atomizers
-Positioning of a CP nozzles deflector
-Orientation of check valves on a spray boom
-Cross sectional shape of a spray boom
What is the COMPLETE pesticide product called? - ANS-Formulation
Pesticide sprays similar to water result from formulations that either: -
ANS--Dissolve in water (WSP,WSL)
-Suspend physically in water (WP,F)
-Suspend chemically in water (EC)
The best way to manage drift potential is to? - ANS-Manage and control
droplet size
An Invert Emulsion is? - ANS-A water soluble substance suspended
in an oil diluent and oil carrier.
Inver Emulsions have what defining characteristics? - ANS--Thick and
creamy
-Do not readily evaporate or break up into small droplets
What is the main purpose of adjuvants? - ANS-To increase a pesticides
effectiveness or safety
Spray adjuvants alter what? - ANS-The PHYSICAL characteristics of a
liquid as it leaves the nozzle, hits the target, or both
, A surfactant is an example of what variety of spray additive? - ANS-
Adjuvant
Adding a surfactant will do what to the characteristics of a spray mix? -
ANS--Change the proportion of the spray emitted as a particular
droplet size
-Change the total spray droplet spectrum produced by the nozzle
tip
Surfactants act in what way? - ANS-Reduce the surface tension of a
liquid and promote the formation of small droplets.
Thickening agents are also referred to as? - ANS-Viscosity modifiers
The terms "tank mix" or "spray mix" generally refer to what? - ANS-A
mixture of several different a.i's, several formulations, and one or more
adjuvant that are combined by at least one diluent or carrier.
What is Microweather? - ANS-The weather conditions at ground level or
within the plant canopy at or near the target site.
What does very stable air indicate? - ANS-A temperature inversion
What is a temperature inversion? - ANS-When the air above is warmer
than the air below. When the air above the target increases in
temperature, it rises carrying spray droplets with it.
True of False: When temperature increases the potential for spray drift
increases? - ANS-TRUE
True or False: Unstable air is preferable for spray applications? - ANS-TRUE
TEST FINAL EXAM 2026 UPDATE
QUESTIONS AND CORRECT VERIFIED
ANSWERS ALREADY GRADED A+
(BRAND NEW VISION)
VMD can also be used to describe in simpler terms? - ANS-The "spread"
of droplet sizes in a given droplet spectrum.
Settling velocity is what? - ANS-The rate at which a spray droplet
falls through the air toward the ground.
Another term for settling velocity is? - ANS-Fall Rate
Settling velocity is generally roughly proportional to what? - ANS-The
square of a droplets diameter.
The settling velocity of a 200 micron droplet is? - ANS-231 feet/minute
The settling velocity of a 20 micron droplet is - ANS-2.4 feet/minute
What can you adjust to alter spray droplet size? - ANS--Nozzle type
-Orifice diameter
-Spray pattern angle
-Travel speed
-Spray pressure
-Nozzle mounting angle
,What are a few of the common nozzle types used in aerial application? -
ANS--Cone
-Fan
-Straight stream
-Rotary atomizers
Which spray pattern angle is less likely to create drift prone droplets, 80 or
110 degree? - ANS-80 degree
Which spray pattern is less likely to produce drift prone droplets, conical or
fan? - ANS-Fan pattern
What influence does air shear have on spray droplets? - ANS-Causes
droplets to collide with each other an break up, creating a greater
number of drift prone droplets.
How should nozzles be angled to avoid disruption by air shear? - ANS-In
the same direction as the air flow, generally straight back for a
fixed wing aircraft.
When applying pesticides aerially, what can you do to create the lest drift
possible? - ANS-Apply using the slowest speed you can safely
operate at.
Increasing spray pressure causes what? - ANS--Spray droplets to
become smaller
-A larger proportion of the spray to become drift prone
To double your spray output using pressure, what sort of increase to pump
pressure must you have? - ANS-The pressure must be quadrupled
What other options do aerial applicators have to alter spray output? -
ANS--Change in travel speed
,-Change in nozzle tips
"Operational Guidelines" is a catch all category for what? - ANS-Spray
system features that you can manipulate to manage the size of
spray droplets, including:
-Rotation rate of rotary atomizers
-Positioning of a CP nozzles deflector
-Orientation of check valves on a spray boom
-Cross sectional shape of a spray boom
What is the COMPLETE pesticide product called? - ANS-Formulation
Pesticide sprays similar to water result from formulations that either: -
ANS--Dissolve in water (WSP,WSL)
-Suspend physically in water (WP,F)
-Suspend chemically in water (EC)
The best way to manage drift potential is to? - ANS-Manage and control
droplet size
An Invert Emulsion is? - ANS-A water soluble substance suspended
in an oil diluent and oil carrier.
Inver Emulsions have what defining characteristics? - ANS--Thick and
creamy
-Do not readily evaporate or break up into small droplets
What is the main purpose of adjuvants? - ANS-To increase a pesticides
effectiveness or safety
Spray adjuvants alter what? - ANS-The PHYSICAL characteristics of a
liquid as it leaves the nozzle, hits the target, or both
, A surfactant is an example of what variety of spray additive? - ANS-
Adjuvant
Adding a surfactant will do what to the characteristics of a spray mix? -
ANS--Change the proportion of the spray emitted as a particular
droplet size
-Change the total spray droplet spectrum produced by the nozzle
tip
Surfactants act in what way? - ANS-Reduce the surface tension of a
liquid and promote the formation of small droplets.
Thickening agents are also referred to as? - ANS-Viscosity modifiers
The terms "tank mix" or "spray mix" generally refer to what? - ANS-A
mixture of several different a.i's, several formulations, and one or more
adjuvant that are combined by at least one diluent or carrier.
What is Microweather? - ANS-The weather conditions at ground level or
within the plant canopy at or near the target site.
What does very stable air indicate? - ANS-A temperature inversion
What is a temperature inversion? - ANS-When the air above is warmer
than the air below. When the air above the target increases in
temperature, it rises carrying spray droplets with it.
True of False: When temperature increases the potential for spray drift
increases? - ANS-TRUE
True or False: Unstable air is preferable for spray applications? - ANS-TRUE
