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MDARD COMMERCIAL PESTICIDE APPLICATOR EXAM:
AQUATIC PEST MANAGEMENT (CATEGORY 5) EXAM
NEWEST / MDARD COMMERCIAL PESTICIDE APPLICATOR
EXAM: AQUATIC PEST MANAGEMENT (CATEGORY 5)
PREPARATION/MDARD COMMERCIAL PESTICIDE
APPLICATOR EXAM 2025/2026 NEWEST ACTUAL EXAM
WITH COMPLETE QUESTIONS AND VERIFIED ANSWERS
|ALREADY GRADED A+|
How long should one wait if more than 50% of a lake area needs
to be treated? - ANSWER-2-3 weeks after the initial application
Ways pesticides break down when not absorbed by pest (4) -
ANSWER-1. Microbial action
2. Chemical
3. Photochemical
4. Adsorption (binding) to soil particles
List 7 of the considerations in planning a successful aquatic
herbicide program - ANSWER-1. Proper ID of weeds
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2. Uses of the water to be treated
3. Timing of the treatment
4. Water characteristics (temp, alkalinity, %DO)
5. Method of application
6. Probability of re-treatment
7. Impact on nontarget plants and animals
8. Weather
9. Cost
10. Permission from appropriate agencies and property owners /
managers to perform the treatment
Bottom treatments are not recommended if a body of water has
______ water or _______ bottoms - ANSWER-flowing, muddy
The inert ingredient (carrier of active ingredient) in granular
formations is typically ___________ - ANSWER-clay
Plants with most of their leaf area above the water surface are
usually treated with this method - ANSWER-Spray
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The dosage of herbicide in flowing water is usually measured in -
ANSWER-Cubic feet per second (cfs)
Contact herbicides often control aquatic plants for ______-______
weeks depending on the growing season - ANSWER-3,6
Where does the greatest amount of pressure occur in a hose? -
ANSWER-Near the pump
Pressure loss in a hose depends on (3) - ANSWER-1. Hose
inside diameter (ID)
2. Hose length
3. Flow rate
Granular herbicides can be applied by hand. True or false? -
ANSWER-False. Must use a spreader
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As a rule of thumb, suction hose diameters should be at least as
large as _____________________ - ANSWER-the pump inlet
port
Name the 5 general types of pumps. - ANSWER-1. Roller
2. Piston
3. Centrifugal
4. Diaphragm
5. Gear
Why aren't roller pumps used often in aquatic weed treatment? -
ANSWER-They do not produce the high pressures needed for
handgun spraying, and fluid would leak back into the pump
Pros and cons of piston pumps - ANSWER-Pros:
-delivers high pressure
-dependable and long-lived
-adaptable
MDARD COMMERCIAL PESTICIDE APPLICATOR EXAM:
AQUATIC PEST MANAGEMENT (CATEGORY 5) EXAM
NEWEST / MDARD COMMERCIAL PESTICIDE APPLICATOR
EXAM: AQUATIC PEST MANAGEMENT (CATEGORY 5)
PREPARATION/MDARD COMMERCIAL PESTICIDE
APPLICATOR EXAM 2025/2026 NEWEST ACTUAL EXAM
WITH COMPLETE QUESTIONS AND VERIFIED ANSWERS
|ALREADY GRADED A+|
How long should one wait if more than 50% of a lake area needs
to be treated? - ANSWER-2-3 weeks after the initial application
Ways pesticides break down when not absorbed by pest (4) -
ANSWER-1. Microbial action
2. Chemical
3. Photochemical
4. Adsorption (binding) to soil particles
List 7 of the considerations in planning a successful aquatic
herbicide program - ANSWER-1. Proper ID of weeds
, Page |2
2. Uses of the water to be treated
3. Timing of the treatment
4. Water characteristics (temp, alkalinity, %DO)
5. Method of application
6. Probability of re-treatment
7. Impact on nontarget plants and animals
8. Weather
9. Cost
10. Permission from appropriate agencies and property owners /
managers to perform the treatment
Bottom treatments are not recommended if a body of water has
______ water or _______ bottoms - ANSWER-flowing, muddy
The inert ingredient (carrier of active ingredient) in granular
formations is typically ___________ - ANSWER-clay
Plants with most of their leaf area above the water surface are
usually treated with this method - ANSWER-Spray
, Page |3
The dosage of herbicide in flowing water is usually measured in -
ANSWER-Cubic feet per second (cfs)
Contact herbicides often control aquatic plants for ______-______
weeks depending on the growing season - ANSWER-3,6
Where does the greatest amount of pressure occur in a hose? -
ANSWER-Near the pump
Pressure loss in a hose depends on (3) - ANSWER-1. Hose
inside diameter (ID)
2. Hose length
3. Flow rate
Granular herbicides can be applied by hand. True or false? -
ANSWER-False. Must use a spreader
, Page |4
As a rule of thumb, suction hose diameters should be at least as
large as _____________________ - ANSWER-the pump inlet
port
Name the 5 general types of pumps. - ANSWER-1. Roller
2. Piston
3. Centrifugal
4. Diaphragm
5. Gear
Why aren't roller pumps used often in aquatic weed treatment? -
ANSWER-They do not produce the high pressures needed for
handgun spraying, and fluid would leak back into the pump
Pros and cons of piston pumps - ANSWER-Pros:
-delivers high pressure
-dependable and long-lived
-adaptable
