CALIFORNIA CUSTODIAN
CERTIFICATION EXAM ADVANCED
STUDY GUIDE QUESTIONS AND
VERIFIED ANSWERS WITH. JUST
RELEASED
1. What is the recommended pH level for a chemical solution used to strip old wax off a VCT
(Vinyl Composition Tile) floor?
A. pH 3.0 - 5.0
B. pH 7.0 (Neutral)
C. pH 1.0 - 2.0
D. pH 11.0 - 13.0
Answer: D
Conceptual Explanation: Floor strippers are highly alkaline (high pH) to break down the
cross-linked polymers in floor finish. Acidic or neutral solutions will not effectively remove
wax.
2. According to OSHA GHS standards, which section of the Safety Data Sheet (SDS) contains
information on personal protective equipment (PPE)?
A. Section 4: First-Aid Measures
,B. Section 8: Exposure Controls/Personal Protection
C. Section 10: Stability and Reactivity
D. Section 2: Hazard Identification
Answer: B
Conceptual Explanation: Section 8 specifies exposure limits, engineering controls, and the
necessary personal protective equipment (PPE) for handling the chemical safely.
3. When using a ‘two-bucket’ system for mopping, what is the primary purpose of the second
bucket?
A. To hold extra cleaning solution
B. To rinse the dirty mop before dipping it back into the clean solution
C. To collect trash found on the floor
D. To store backup mop heads
Answer: B
Conceptual Explanation: The two-bucket system prevents cross-contamination by
ensuring that dirt removed from the floor is rinsed into a separate bucket rather than
contaminating the fresh cleaning solution.
4. Which of the following describes the ‘dwell time’ of a disinfectant?
A. The time it takes for a chemical to dry naturally
B. The speed at which a custodian can mop a room
, C. The required time a surface must remain wet with the disinfectant to kill specific
pathogens
D. The shelf life of the chemical in the storage closet
Answer: C
Conceptual Explanation: Dwell time is the amount of time a disinfectant must remain in
contact with a surface to effectively kill the microorganisms listed on its label.
5. What is the result of mixing bleach (sodium hypochlorite) with ammonia-based cleaners?
A. A more powerful disinfecting solution
B. A solution that removes rust more effectively
C. A neutral solution that is safe for skin contact
D. The creation of toxic chloramine gas
Answer: D
Conceptual Explanation: Mixing bleach and ammonia creates toxic chloramine gas, which
can cause severe respiratory distress and is potentially fatal.
6. When buffing a floor with a high-speed burnisher (1500+ RPM), which type of pad is
typically most appropriate?
A. Black stripping pad
B. White or natural hair polishing pad
C. Green scrubbing pad
CERTIFICATION EXAM ADVANCED
STUDY GUIDE QUESTIONS AND
VERIFIED ANSWERS WITH. JUST
RELEASED
1. What is the recommended pH level for a chemical solution used to strip old wax off a VCT
(Vinyl Composition Tile) floor?
A. pH 3.0 - 5.0
B. pH 7.0 (Neutral)
C. pH 1.0 - 2.0
D. pH 11.0 - 13.0
Answer: D
Conceptual Explanation: Floor strippers are highly alkaline (high pH) to break down the
cross-linked polymers in floor finish. Acidic or neutral solutions will not effectively remove
wax.
2. According to OSHA GHS standards, which section of the Safety Data Sheet (SDS) contains
information on personal protective equipment (PPE)?
A. Section 4: First-Aid Measures
,B. Section 8: Exposure Controls/Personal Protection
C. Section 10: Stability and Reactivity
D. Section 2: Hazard Identification
Answer: B
Conceptual Explanation: Section 8 specifies exposure limits, engineering controls, and the
necessary personal protective equipment (PPE) for handling the chemical safely.
3. When using a ‘two-bucket’ system for mopping, what is the primary purpose of the second
bucket?
A. To hold extra cleaning solution
B. To rinse the dirty mop before dipping it back into the clean solution
C. To collect trash found on the floor
D. To store backup mop heads
Answer: B
Conceptual Explanation: The two-bucket system prevents cross-contamination by
ensuring that dirt removed from the floor is rinsed into a separate bucket rather than
contaminating the fresh cleaning solution.
4. Which of the following describes the ‘dwell time’ of a disinfectant?
A. The time it takes for a chemical to dry naturally
B. The speed at which a custodian can mop a room
, C. The required time a surface must remain wet with the disinfectant to kill specific
pathogens
D. The shelf life of the chemical in the storage closet
Answer: C
Conceptual Explanation: Dwell time is the amount of time a disinfectant must remain in
contact with a surface to effectively kill the microorganisms listed on its label.
5. What is the result of mixing bleach (sodium hypochlorite) with ammonia-based cleaners?
A. A more powerful disinfecting solution
B. A solution that removes rust more effectively
C. A neutral solution that is safe for skin contact
D. The creation of toxic chloramine gas
Answer: D
Conceptual Explanation: Mixing bleach and ammonia creates toxic chloramine gas, which
can cause severe respiratory distress and is potentially fatal.
6. When buffing a floor with a high-speed burnisher (1500+ RPM), which type of pad is
typically most appropriate?
A. Black stripping pad
B. White or natural hair polishing pad
C. Green scrubbing pad
