California Custodian Exam -Practice Questions And
Answers 2026/2027 Exam | Complete Questions And
Answers (Verified Answers) | Exam Prep |
Comprehensive Exam Guide 2026&2027
1. A custodian discovers a wet floor in a busy school hallway shortly before students change
classes. What should the custodian do FIRST?
A. Continue cleaning and address the traffic later
B. Place warning signs or barricades around the wet area
C. Ask a nearby employee to monitor the area
D. Leave the area until the floor dries naturally
Answer: B
Placing warning signs or barricades immediately reduces the risk of slips and falls while
cleaning continues.
2. Which cleaning method is generally most appropriate for removing loose dust from a
hard floor before damp mopping?
A. Dry dust mopping or vacuuming
B. Flooding the floor with disinfectant
C. Scrubbing with a stripping solution
D. Applying floor finish
Answer: A
Removing loose soil first prevents dust and debris from becoming mud during damp mopping
and improves cleaning effectiveness.
3. A custodian is instructed to dilute a concentrated cleaning chemical. Which source
should be used to determine the correct dilution ratio?
A. A coworker's usual practice
B. The appearance of the finished solution
C. The product label and applicable safety instructions
D. The amount of water available
Answer: C
The manufacturer’s label provides the approved dilution instructions and is the appropriate
reference for safe and effective chemical use.
,4. While cleaning a restroom, a custodian notices that a dispenser is leaking onto the floor.
What is the most appropriate response?
A. Ignore the leak because it is not part of cleaning
B. Place paper towels underneath and leave it permanently
C. Increase the amount of cleaner used on the floor
D. Address the leak or report it promptly and control the slip hazard
Answer: D
A leaking dispenser can create both a sanitation problem and a slip hazard, so the condition
should be corrected or reported while the immediate hazard is controlled.
5. Which personal protective equipment is most appropriate when a chemical product label
requires protection against splashes to the eyes?
A. Safety goggles or appropriate eye protection
B. Cotton work gloves only
C. Hearing protection
D. A dust mop
Answer: A
Eye protection helps prevent chemical splashes from contacting the eyes and should be
selected according to the product’s safety requirements.
6. A custodian accidentally mixes two cleaning chemicals and notices fumes forming. What
should the custodian do?
A. Add water to neutralize the mixture
B. Continue working quickly to finish the task
C. Leave the area, avoid exposure, and follow emergency procedures
D. Pour the mixture into a drain
Answer: C
Unexpected chemical reactions can produce hazardous vapors. The safest response is to avoid
exposure, leave the affected area, and follow established emergency procedures.
7. What is the primary purpose of a Safety Data Sheet (SDS)?
A. To record employee attendance
B. To provide information about chemical hazards, handling, storage, and emergency measures
C. To establish cleaning schedules
D. To document building maintenance costs
,Answer: B
An SDS provides essential information about a chemical’s hazards, safe handling, required
protective measures, storage, and emergency response.
8. A restroom has a persistent unpleasant odor even after routine cleaning. What should
the custodian do?
A. Use increasingly strong fragrances
B. Close the restroom without reporting the problem
C. Determine whether the odor indicates a sanitation, plumbing, or maintenance problem
D. Mix several disinfectants to eliminate the smell
Answer: C
Persistent odors may indicate an underlying sanitation or maintenance issue, so identifying
and reporting the source is more appropriate than masking it.
9. Which practice best reduces cross-contamination when cleaning multiple restroom
areas?
A. Using the same cloth everywhere
B. Cleaning visibly dirty areas first and then moving to cleaner areas with appropriate tools
C. Reusing contaminated solution throughout the building
D. Spraying every surface with the same chemical
Answer: B
Using appropriate tools and moving from cleaner areas toward dirtier areas helps prevent
transferring contaminants between surfaces.
10. A floor machine begins vibrating unusually during operation. What should the
custodian do?
A. Increase the machine speed
B. Continue operating until the shift ends
C. Stop the machine and inspect it according to procedure
D. Add more cleaning solution
Answer: C
Unusual vibration may indicate a damaged pad, brush, attachment, or mechanical problem.
Stopping the machine helps prevent injury or equipment damage.
11. Which action is most appropriate when operating electrical cleaning equipment near
water?
, A. Keep electrical connections away from water and follow electrical safety procedures
B. Place extension cords directly through standing water
C. Operate equipment with wet hands
D. Remove the equipment grounding feature
Answer: A
Water and electricity create a serious shock hazard. Electrical equipment and connections
must be protected from water exposure and used according to safety procedures.
12. A custodian finds a damaged electrical cord on a vacuum cleaner. What is the safest
action?
A. Wrap the damaged section with paper
B. Continue using it at reduced power
C. Remove the equipment from service and report the defect
D. Use it only on dry floors
Answer: C
A damaged cord can expose workers to electrical shock or fire hazards. Defective equipment
should be removed from service and reported for repair or replacement.
13. What is the main purpose of routine restroom disinfection?
A. To make surfaces look shiny
B. To reduce harmful microorganisms on appropriate surfaces
C. To eliminate all dust from the building
D. To increase air circulation
Answer: B
Disinfection is intended to reduce microorganisms on suitable surfaces when the product is
used according to its label directions.
14. When should a custodian generally wash their hands after handling cleaning
chemicals?
A. Only at the end of the workweek
B. Only when hands appear visibly dirty
C. According to established hygiene procedures, particularly after chemical handling and before
eating
D. Only after cleaning restrooms
Answer: C
Answers 2026/2027 Exam | Complete Questions And
Answers (Verified Answers) | Exam Prep |
Comprehensive Exam Guide 2026&2027
1. A custodian discovers a wet floor in a busy school hallway shortly before students change
classes. What should the custodian do FIRST?
A. Continue cleaning and address the traffic later
B. Place warning signs or barricades around the wet area
C. Ask a nearby employee to monitor the area
D. Leave the area until the floor dries naturally
Answer: B
Placing warning signs or barricades immediately reduces the risk of slips and falls while
cleaning continues.
2. Which cleaning method is generally most appropriate for removing loose dust from a
hard floor before damp mopping?
A. Dry dust mopping or vacuuming
B. Flooding the floor with disinfectant
C. Scrubbing with a stripping solution
D. Applying floor finish
Answer: A
Removing loose soil first prevents dust and debris from becoming mud during damp mopping
and improves cleaning effectiveness.
3. A custodian is instructed to dilute a concentrated cleaning chemical. Which source
should be used to determine the correct dilution ratio?
A. A coworker's usual practice
B. The appearance of the finished solution
C. The product label and applicable safety instructions
D. The amount of water available
Answer: C
The manufacturer’s label provides the approved dilution instructions and is the appropriate
reference for safe and effective chemical use.
,4. While cleaning a restroom, a custodian notices that a dispenser is leaking onto the floor.
What is the most appropriate response?
A. Ignore the leak because it is not part of cleaning
B. Place paper towels underneath and leave it permanently
C. Increase the amount of cleaner used on the floor
D. Address the leak or report it promptly and control the slip hazard
Answer: D
A leaking dispenser can create both a sanitation problem and a slip hazard, so the condition
should be corrected or reported while the immediate hazard is controlled.
5. Which personal protective equipment is most appropriate when a chemical product label
requires protection against splashes to the eyes?
A. Safety goggles or appropriate eye protection
B. Cotton work gloves only
C. Hearing protection
D. A dust mop
Answer: A
Eye protection helps prevent chemical splashes from contacting the eyes and should be
selected according to the product’s safety requirements.
6. A custodian accidentally mixes two cleaning chemicals and notices fumes forming. What
should the custodian do?
A. Add water to neutralize the mixture
B. Continue working quickly to finish the task
C. Leave the area, avoid exposure, and follow emergency procedures
D. Pour the mixture into a drain
Answer: C
Unexpected chemical reactions can produce hazardous vapors. The safest response is to avoid
exposure, leave the affected area, and follow established emergency procedures.
7. What is the primary purpose of a Safety Data Sheet (SDS)?
A. To record employee attendance
B. To provide information about chemical hazards, handling, storage, and emergency measures
C. To establish cleaning schedules
D. To document building maintenance costs
,Answer: B
An SDS provides essential information about a chemical’s hazards, safe handling, required
protective measures, storage, and emergency response.
8. A restroom has a persistent unpleasant odor even after routine cleaning. What should
the custodian do?
A. Use increasingly strong fragrances
B. Close the restroom without reporting the problem
C. Determine whether the odor indicates a sanitation, plumbing, or maintenance problem
D. Mix several disinfectants to eliminate the smell
Answer: C
Persistent odors may indicate an underlying sanitation or maintenance issue, so identifying
and reporting the source is more appropriate than masking it.
9. Which practice best reduces cross-contamination when cleaning multiple restroom
areas?
A. Using the same cloth everywhere
B. Cleaning visibly dirty areas first and then moving to cleaner areas with appropriate tools
C. Reusing contaminated solution throughout the building
D. Spraying every surface with the same chemical
Answer: B
Using appropriate tools and moving from cleaner areas toward dirtier areas helps prevent
transferring contaminants between surfaces.
10. A floor machine begins vibrating unusually during operation. What should the
custodian do?
A. Increase the machine speed
B. Continue operating until the shift ends
C. Stop the machine and inspect it according to procedure
D. Add more cleaning solution
Answer: C
Unusual vibration may indicate a damaged pad, brush, attachment, or mechanical problem.
Stopping the machine helps prevent injury or equipment damage.
11. Which action is most appropriate when operating electrical cleaning equipment near
water?
, A. Keep electrical connections away from water and follow electrical safety procedures
B. Place extension cords directly through standing water
C. Operate equipment with wet hands
D. Remove the equipment grounding feature
Answer: A
Water and electricity create a serious shock hazard. Electrical equipment and connections
must be protected from water exposure and used according to safety procedures.
12. A custodian finds a damaged electrical cord on a vacuum cleaner. What is the safest
action?
A. Wrap the damaged section with paper
B. Continue using it at reduced power
C. Remove the equipment from service and report the defect
D. Use it only on dry floors
Answer: C
A damaged cord can expose workers to electrical shock or fire hazards. Defective equipment
should be removed from service and reported for repair or replacement.
13. What is the main purpose of routine restroom disinfection?
A. To make surfaces look shiny
B. To reduce harmful microorganisms on appropriate surfaces
C. To eliminate all dust from the building
D. To increase air circulation
Answer: B
Disinfection is intended to reduce microorganisms on suitable surfaces when the product is
used according to its label directions.
14. When should a custodian generally wash their hands after handling cleaning
chemicals?
A. Only at the end of the workweek
B. Only when hands appear visibly dirty
C. According to established hygiene procedures, particularly after chemical handling and before
eating
D. Only after cleaning restrooms
Answer: C
