Washington Pesticide Laws and Safety Practice Test
Questions Exam 2026-2027 155 QUESTIONS AND
100% VERIFIED SOLUTIONS, ELABORATED &
DETAILED CORRECT ANSWERS
2 or more pesticides that cannot be effectively mixed together are said to be ____________. -
CORRECT ANSWER: Incompatible
Accidental or intentional environmental damage caused by a pesticide can result in financial
losses to the responsible party. - CORRECT ANSWER: True
Adjuvants are often required when making applications to leaves that are _________ or
__________. - CORRECT ANSWER: Waxy or hairy
Aerial application of OUT is - CORRECT ANSWER: Prohibited by the label
Application records must be kept for ____ years - CORRECT ANSWER: 7
Applicators who regularly use organophosphate and carbamate insecticides are advised to have a
pre-season blood test to establish their normal baseline level of: - CORRECT ANSWER:
Cholinesterase
DDT was banned because of its: - CORRECT ANSWER: Stability and persistence
Dealers must keep records for 7 years in the sale of general use agricultural pesticides. -
CORRECT ANSWER: True
Drift problems can be reduced by - CORRECT ANSWER: Placing a spray boom as close to the
target as possible.
,Drift problems can be reduced by: - CORRECT ANSWER: Placing a boom as close to the target
as possible.
Fish kills most commonly result from pollution of water by, - CORRECT ANSWER:
Insecticides
For OUT, oxyfluorfen is the, - CORRECT ANSWER: Common name
For the best preemergence control of annual broadleaf weeds, OUT applications should be made
in the, - CORRECT ANSWER: Winter
Gloves and boots worn when handling pesticides should be made of - CORRECT ANSWER:
Unlined rubber
How many pounds of active ingredient are in a quart of OUT - CORRECT ANSWER: 0.4
pounds
How soon can workers enter the field without protective clothing after an OUT application? -
CORRECT ANSWER: After 48 hours
If a licensed commercial applicator in Washington chooses to recertify by course credit, how
many recertification credits do they need? - CORRECT ANSWER: 40 credits in 5 years
If a nozzle becomes clogged while spraying. - CORRECT ANSWER: Stop spraying, move to an
untreated area, and use a soft brush to clean the plugged nozzle.
If pesticide is spilled on the skin or clothing, the first reaction should be to: - CORRECT
ANSWER: Remove all contaminated clothing and wash affected area with soap and water
, If the product you choose to use has an Endangered Species Restriction listed, you should -
CORRECT ANSWER: Obtain the necessary information to determine what the restriction
entails.
If you accidentally swallowed OUT, you should - CORRECT ANSWER: Contact your doctor
If you have a pesticide spill at your mix and load site that doesn't pose a threat to the
environment or humans, you should. - CORRECT ANSWER: Control, confine, and clean up the
spill
Legal control utilizes _____________. - CORRECT ANSWER: Quarantines
No person should be allowed to enter early into an area still under REI from a treatment with No
Pest unless they are provided with _______________. - CORRECT ANSWER: PPE Personal
Protective Equipment
Organophosphate and carbamate insecticides have the most direct effects on what major body
system? - CORRECT ANSWER: Nervous system
Other than acute toxicity, OUT poses a hazard from - CORRECT ANSWER: Combustion
OUT cannot be applied by - CORRECT ANSWER: Chemigation
OUT CANNOT legally be used on spearmint to attempt control of which of the following
weeds? - CORRECT ANSWER: Both are legal: common mustard and pigweed (trick question)
Pest control that involves the use of numerous tactics is called __________. - CORRECT
ANSWER: IPM Integrated Pest Management
Questions Exam 2026-2027 155 QUESTIONS AND
100% VERIFIED SOLUTIONS, ELABORATED &
DETAILED CORRECT ANSWERS
2 or more pesticides that cannot be effectively mixed together are said to be ____________. -
CORRECT ANSWER: Incompatible
Accidental or intentional environmental damage caused by a pesticide can result in financial
losses to the responsible party. - CORRECT ANSWER: True
Adjuvants are often required when making applications to leaves that are _________ or
__________. - CORRECT ANSWER: Waxy or hairy
Aerial application of OUT is - CORRECT ANSWER: Prohibited by the label
Application records must be kept for ____ years - CORRECT ANSWER: 7
Applicators who regularly use organophosphate and carbamate insecticides are advised to have a
pre-season blood test to establish their normal baseline level of: - CORRECT ANSWER:
Cholinesterase
DDT was banned because of its: - CORRECT ANSWER: Stability and persistence
Dealers must keep records for 7 years in the sale of general use agricultural pesticides. -
CORRECT ANSWER: True
Drift problems can be reduced by - CORRECT ANSWER: Placing a spray boom as close to the
target as possible.
,Drift problems can be reduced by: - CORRECT ANSWER: Placing a boom as close to the target
as possible.
Fish kills most commonly result from pollution of water by, - CORRECT ANSWER:
Insecticides
For OUT, oxyfluorfen is the, - CORRECT ANSWER: Common name
For the best preemergence control of annual broadleaf weeds, OUT applications should be made
in the, - CORRECT ANSWER: Winter
Gloves and boots worn when handling pesticides should be made of - CORRECT ANSWER:
Unlined rubber
How many pounds of active ingredient are in a quart of OUT - CORRECT ANSWER: 0.4
pounds
How soon can workers enter the field without protective clothing after an OUT application? -
CORRECT ANSWER: After 48 hours
If a licensed commercial applicator in Washington chooses to recertify by course credit, how
many recertification credits do they need? - CORRECT ANSWER: 40 credits in 5 years
If a nozzle becomes clogged while spraying. - CORRECT ANSWER: Stop spraying, move to an
untreated area, and use a soft brush to clean the plugged nozzle.
If pesticide is spilled on the skin or clothing, the first reaction should be to: - CORRECT
ANSWER: Remove all contaminated clothing and wash affected area with soap and water
, If the product you choose to use has an Endangered Species Restriction listed, you should -
CORRECT ANSWER: Obtain the necessary information to determine what the restriction
entails.
If you accidentally swallowed OUT, you should - CORRECT ANSWER: Contact your doctor
If you have a pesticide spill at your mix and load site that doesn't pose a threat to the
environment or humans, you should. - CORRECT ANSWER: Control, confine, and clean up the
spill
Legal control utilizes _____________. - CORRECT ANSWER: Quarantines
No person should be allowed to enter early into an area still under REI from a treatment with No
Pest unless they are provided with _______________. - CORRECT ANSWER: PPE Personal
Protective Equipment
Organophosphate and carbamate insecticides have the most direct effects on what major body
system? - CORRECT ANSWER: Nervous system
Other than acute toxicity, OUT poses a hazard from - CORRECT ANSWER: Combustion
OUT cannot be applied by - CORRECT ANSWER: Chemigation
OUT CANNOT legally be used on spearmint to attempt control of which of the following
weeds? - CORRECT ANSWER: Both are legal: common mustard and pigweed (trick question)
Pest control that involves the use of numerous tactics is called __________. - CORRECT
ANSWER: IPM Integrated Pest Management
