Page 1 of 56
WASHINGTON PESTICIDE LAWS AND SAFETY
2026 PRACTICE EXAM COMPLETE (213)
CURRENT TESTING QUESTIONS AND
DETAILED CORRECT
ANSWERS|GUARANTEED PASS.
PESTICIDE
Prepare with confidence using this Washington Pesticide Laws
and Safety Practice Exam, designed to assess knowledge of
pesticide regulations and safe application practices. It focuses
on state and federal laws, environmental protection, handling
procedures, and applicator safety standards. The exam
strengthens understanding of legal compliance and responsible
pesticide use. Suitable for pesticide applicators and licensing
candidates in Washington State.
Which statement is true about chemical incompatibility?
A. It is not necessary to consider chemical compatibility
effects when mixing a pesticide with hard water, chlorinated
water, or fertilizers.
B. Increasing the chemical activity of two or more products
mixed together is always harmful.
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C. Chemical incompatibility occurs when the activity of the
mixed products is reduced.
D. Labels do not proved information on avoiding chemical
incompatibility. ✓ ✓ ...... ANSWER ....... C
Which is not a means of preventing contamination of water
sources?
A. When filling the tank, keep the hose down in the pesticide
mixture.
B. Use a check valve, anti-siphoning device, or backflow
preventer when pumping water directly from the source into
a mix tank.
C. Mix and load pesticides on a containment pad.
D. Locate mixing equipment so that leaks or spills flow away
from a drain or water source. ✓ ✓ ...... ANSWER ....... A
Which statement is true about cleaning pesticide
equipment?
A. Always wash equipment in the same locations unless you
use a containment pad or tray.
B. There is very little risk of pesticide exposure during
equipment cleanup.
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C. It is a good idea to wait until the end of the work week
before cleaning up equipment.
D. Sloppy cleanup practices are one of the main causes of
equipment failure or malfunction. ✓ ✓ ...... ANSWER .......
D
Which type of pesticide application procedures would you
use to apply a herbicide between the rows of crops?
A. Broadcast application.
B. Band appliation.
C. Crack and crevice application.
D. Foliar application. ✓ ✓ ...... ANSWER ....... B
You are applying pesticide to a rectangular area that is 50
feet long by 20 feet wide. What is the area in square feet?
A. 70 square feet
B. 100 square feet
C. 500 square feet
D. 1,000 square feet ✓ ✓ ...... ANSWER ....... D
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You determined from a calibration test that your boom
sprayer delivers 8 galoons of water over a 0.25-acre (1/4
acre) test area. You need to apply pesticide to a 10-acre
field. How much spray mixture is needed for the 10-acre
application area?
A. 80 gallons.
B. 120 gallons.
C. 320 gallons.
D. 400 gallons. ✓ ✓ ...... ANSWER ....... C
From your calibration test, you determine that your
backpack sprayer delivers 0.25 gallon of water to cover a
250-square-foot test area. The label recommends applying
pesticide at a rate of 6 ounces of product per gallon. How
many ounces of product are needed to cover a 1,000-
squarefoot applicaito area?
A. 6 ounces
B. 12 ounces
C. 18 ounces
D. 24 ounces ✓ ✓ ...... ANSWER ....... A
WASHINGTON PESTICIDE LAWS AND SAFETY
2026 PRACTICE EXAM COMPLETE (213)
CURRENT TESTING QUESTIONS AND
DETAILED CORRECT
ANSWERS|GUARANTEED PASS.
PESTICIDE
Prepare with confidence using this Washington Pesticide Laws
and Safety Practice Exam, designed to assess knowledge of
pesticide regulations and safe application practices. It focuses
on state and federal laws, environmental protection, handling
procedures, and applicator safety standards. The exam
strengthens understanding of legal compliance and responsible
pesticide use. Suitable for pesticide applicators and licensing
candidates in Washington State.
Which statement is true about chemical incompatibility?
A. It is not necessary to consider chemical compatibility
effects when mixing a pesticide with hard water, chlorinated
water, or fertilizers.
B. Increasing the chemical activity of two or more products
mixed together is always harmful.
, Page 2 of 56
C. Chemical incompatibility occurs when the activity of the
mixed products is reduced.
D. Labels do not proved information on avoiding chemical
incompatibility. ✓ ✓ ...... ANSWER ....... C
Which is not a means of preventing contamination of water
sources?
A. When filling the tank, keep the hose down in the pesticide
mixture.
B. Use a check valve, anti-siphoning device, or backflow
preventer when pumping water directly from the source into
a mix tank.
C. Mix and load pesticides on a containment pad.
D. Locate mixing equipment so that leaks or spills flow away
from a drain or water source. ✓ ✓ ...... ANSWER ....... A
Which statement is true about cleaning pesticide
equipment?
A. Always wash equipment in the same locations unless you
use a containment pad or tray.
B. There is very little risk of pesticide exposure during
equipment cleanup.
, Page 3 of 56
C. It is a good idea to wait until the end of the work week
before cleaning up equipment.
D. Sloppy cleanup practices are one of the main causes of
equipment failure or malfunction. ✓ ✓ ...... ANSWER .......
D
Which type of pesticide application procedures would you
use to apply a herbicide between the rows of crops?
A. Broadcast application.
B. Band appliation.
C. Crack and crevice application.
D. Foliar application. ✓ ✓ ...... ANSWER ....... B
You are applying pesticide to a rectangular area that is 50
feet long by 20 feet wide. What is the area in square feet?
A. 70 square feet
B. 100 square feet
C. 500 square feet
D. 1,000 square feet ✓ ✓ ...... ANSWER ....... D
, Page 4 of 56
You determined from a calibration test that your boom
sprayer delivers 8 galoons of water over a 0.25-acre (1/4
acre) test area. You need to apply pesticide to a 10-acre
field. How much spray mixture is needed for the 10-acre
application area?
A. 80 gallons.
B. 120 gallons.
C. 320 gallons.
D. 400 gallons. ✓ ✓ ...... ANSWER ....... C
From your calibration test, you determine that your
backpack sprayer delivers 0.25 gallon of water to cover a
250-square-foot test area. The label recommends applying
pesticide at a rate of 6 ounces of product per gallon. How
many ounces of product are needed to cover a 1,000-
squarefoot applicaito area?
A. 6 ounces
B. 12 ounces
C. 18 ounces
D. 24 ounces ✓ ✓ ...... ANSWER ....... A
