California Custodian Certification Exam
Test Questions And Correct Answers
(Verified Answers) Plus Rationales
2025/2026 Q&A | Instant Download Pdf
1. You notice a wet floor in a high-traffic hallway but no warning signs are
present. What should you do FIRST?
A. Ignore it
B. Place a warning sign immediately and clean the spill
C. Wait for instructions
D. Block the hallway permanently
Answer: B
Rationale: Immediate hazard control and warning signage prevent slip
injuries.
2. A cleaning chemical label is partially unreadable. What is the BEST action?
A. Guess the chemical
B. Use it carefully
C. Do not use it and report it
D. Mix it with water to test it
Answer: C
Rationale: Unlabeled chemicals present serious safety risks.
3. You finish mopping an area and a visitor walks in immediately and slips.
What is the MOST likely issue?
A. Poor lighting
B. Lack of warning signage or drying time
C. Visitor negligence only
D. Floor material defect
Answer: B
Rationale: Proper signage and drying time are essential for safety.
,4. A coworker mixes bleach and ammonia to “clean better.” What should you
do?
A. Join them
B. Ignore it
C. Stop them immediately and report safety violation
D. Wait until after shift
Answer: C
Rationale: This creates toxic gas and is extremely dangerous.
5. You find a broken glass bottle in a restroom. What is BEST action?
A. Pick it up with bare hands
B. Sweep it quickly
C. Use proper tools and dispose safely
D. Leave it for later
Answer: C
Rationale: Safe handling prevents injury and contamination.
6. A spill occurs in a cafeteria during peak hours. What should you do FIRST?
A. Clean slowly without warning
B. Place hazard signage and restrict access
C. Ignore until rush ends
D. Ask visitors to avoid it verbally only
Answer: B
Rationale: Immediate hazard control prevents accidents.
7. You run out of cleaning solution mid-task. What is BEST action?
A. Dilute unknown chemical
B. Use another chemical without checking
C. Request approved replacement supply
D. Skip cleaning area
Answer: C
Rationale: Only approved products should be used.
8. A restroom smells strongly of chemicals after cleaning. What should you
do?
A. Ignore
B. Open ventilation and ensure safe air circulation
, C. Add more chemicals
D. Close area permanently
Answer: B
Rationale: Ventilation reduces chemical exposure risk.
9. You notice a biohazard spill (blood or bodily fluid). What is FIRST step?
A. Wipe immediately
B. Ignore
C. Use proper PPE and follow biohazard protocol
D. Cover with paper towels only
Answer: C
Rationale: Biohazards require strict safety procedures.
10.A coworker is not wearing gloves while handling cleaning chemicals. What
should you do?
A. Ignore
B. Join them
C. Remind them of PPE requirements
D. Report immediately without warning
Answer: C
Rationale: PPE prevents chemical exposure injuries.
11.A mop bucket is left unattended in a hallway. What is BEST action?
A. Ignore
B. Move it to storage properly
C. Use it immediately
D. Pour it down drain randomly
Answer: B
Rationale: Proper storage prevents slip hazards.
12.You find expired cleaning chemicals in storage. What should you do?
A. Use them
B. Dispose immediately without checking rules
C. Report and follow disposal procedures
D. Mix them together
Answer: C
Rationale: Expired chemicals may be unsafe.
, 13.A spill is spreading quickly in a busy corridor. What is BEST response?
A. Wait for supervisor
B. Contain spill immediately and warn others
C. Ignore
D. Walk through it
Answer: B
Rationale: Immediate containment prevents accidents.
14.You see a coworker improperly diluting disinfectant. What should you do?
A. Ignore
B. Correct them and follow label instructions
C. Continue working
D. Report only later
Answer: B
Rationale: Correct dilution ensures safety and effectiveness.
15.A restroom sink is clogged and overflowing. What is BEST action?
A. Ignore
B. Attempt quick fix without tools
C. Report and block area if needed
D. Force water down
Answer: C
Rationale: Overflow can create slip hazards and damage.
16.You are assigned multiple areas but running behind schedule. What should
you do?
A. Skip cleaning
B. Rush unsafely
C. Inform supervisor and prioritize critical areas
D. Ignore instructions
Answer: C
Rationale: Communication ensures proper task prioritization.
17.A coworker complains about cleaning chemicals causing irritation. What
should you do?
A. Ignore
B. Suggest continuing work
Test Questions And Correct Answers
(Verified Answers) Plus Rationales
2025/2026 Q&A | Instant Download Pdf
1. You notice a wet floor in a high-traffic hallway but no warning signs are
present. What should you do FIRST?
A. Ignore it
B. Place a warning sign immediately and clean the spill
C. Wait for instructions
D. Block the hallway permanently
Answer: B
Rationale: Immediate hazard control and warning signage prevent slip
injuries.
2. A cleaning chemical label is partially unreadable. What is the BEST action?
A. Guess the chemical
B. Use it carefully
C. Do not use it and report it
D. Mix it with water to test it
Answer: C
Rationale: Unlabeled chemicals present serious safety risks.
3. You finish mopping an area and a visitor walks in immediately and slips.
What is the MOST likely issue?
A. Poor lighting
B. Lack of warning signage or drying time
C. Visitor negligence only
D. Floor material defect
Answer: B
Rationale: Proper signage and drying time are essential for safety.
,4. A coworker mixes bleach and ammonia to “clean better.” What should you
do?
A. Join them
B. Ignore it
C. Stop them immediately and report safety violation
D. Wait until after shift
Answer: C
Rationale: This creates toxic gas and is extremely dangerous.
5. You find a broken glass bottle in a restroom. What is BEST action?
A. Pick it up with bare hands
B. Sweep it quickly
C. Use proper tools and dispose safely
D. Leave it for later
Answer: C
Rationale: Safe handling prevents injury and contamination.
6. A spill occurs in a cafeteria during peak hours. What should you do FIRST?
A. Clean slowly without warning
B. Place hazard signage and restrict access
C. Ignore until rush ends
D. Ask visitors to avoid it verbally only
Answer: B
Rationale: Immediate hazard control prevents accidents.
7. You run out of cleaning solution mid-task. What is BEST action?
A. Dilute unknown chemical
B. Use another chemical without checking
C. Request approved replacement supply
D. Skip cleaning area
Answer: C
Rationale: Only approved products should be used.
8. A restroom smells strongly of chemicals after cleaning. What should you
do?
A. Ignore
B. Open ventilation and ensure safe air circulation
, C. Add more chemicals
D. Close area permanently
Answer: B
Rationale: Ventilation reduces chemical exposure risk.
9. You notice a biohazard spill (blood or bodily fluid). What is FIRST step?
A. Wipe immediately
B. Ignore
C. Use proper PPE and follow biohazard protocol
D. Cover with paper towels only
Answer: C
Rationale: Biohazards require strict safety procedures.
10.A coworker is not wearing gloves while handling cleaning chemicals. What
should you do?
A. Ignore
B. Join them
C. Remind them of PPE requirements
D. Report immediately without warning
Answer: C
Rationale: PPE prevents chemical exposure injuries.
11.A mop bucket is left unattended in a hallway. What is BEST action?
A. Ignore
B. Move it to storage properly
C. Use it immediately
D. Pour it down drain randomly
Answer: B
Rationale: Proper storage prevents slip hazards.
12.You find expired cleaning chemicals in storage. What should you do?
A. Use them
B. Dispose immediately without checking rules
C. Report and follow disposal procedures
D. Mix them together
Answer: C
Rationale: Expired chemicals may be unsafe.
, 13.A spill is spreading quickly in a busy corridor. What is BEST response?
A. Wait for supervisor
B. Contain spill immediately and warn others
C. Ignore
D. Walk through it
Answer: B
Rationale: Immediate containment prevents accidents.
14.You see a coworker improperly diluting disinfectant. What should you do?
A. Ignore
B. Correct them and follow label instructions
C. Continue working
D. Report only later
Answer: B
Rationale: Correct dilution ensures safety and effectiveness.
15.A restroom sink is clogged and overflowing. What is BEST action?
A. Ignore
B. Attempt quick fix without tools
C. Report and block area if needed
D. Force water down
Answer: C
Rationale: Overflow can create slip hazards and damage.
16.You are assigned multiple areas but running behind schedule. What should
you do?
A. Skip cleaning
B. Rush unsafely
C. Inform supervisor and prioritize critical areas
D. Ignore instructions
Answer: C
Rationale: Communication ensures proper task prioritization.
17.A coworker complains about cleaning chemicals causing irritation. What
should you do?
A. Ignore
B. Suggest continuing work
