CALIFORNIA CUSTODIAN
PROFESSIONAL CERTIFICATION
FINAL EXAM 2026/2027 QUESTIONS AND
VERIFIED ANSWERS WITH. JUST
RELEASED
1. When diluting a concentrated chemical with a ratio of 1:64, how many ounces of chemical
are needed for a 5-gallon bucket?
A. 10 ounces
B. 8 ounces
C. 5 ounces
D. 12 ounces
Answer: A
Conceptual Explanation: A 5-gallon bucket contains 640 ounces. 640 divided by 64 equals
10 ounces of concentrate.
2. Which section of the Safety Data Sheet (SDS) provides information on Personal Protective
Equipment (PPE) requirements?
A. Section 8
B. Section 4
,C. Section 11
D. Section 2
Answer: A
Conceptual Explanation: Section 8 of the SDS specifically covers Exposure Controls and
Personal Protection.
3. What is the standard dwell time for a disinfectant to be effective against most common
pathogens, including Norovirus, on a hard surface?
A. 30 seconds
B. 2 minutes
C. 10 minutes
D. 5 minutes
Answer: C
Conceptual Explanation: While some chemicals vary, 10 minutes is the industry standard
for complete disinfection for high-level pathogens.
4. On the pH scale, a floor stripper typically falls into which range?
A. pH 11.0 - 13.0
B. pH 6.0 - 8.0
C. pH 1.0 - 3.0
, D. pH 4.0 - 5.0
Answer: A
Conceptual Explanation: Strippers are highly alkaline (basic) to break down the cross-
linked polymers in floor finishes.
5. Which floor pad color is most appropriate for high-speed burnishing (1500-3000 RPM)?
A. Black
B. White or Natural Hair
C. Green
D. Blue
Answer: B
Conceptual Explanation: White or natural hair pads are non-abrasive and designed for
polishing and thermal buffing.
6. What is the primary risk of mixing bleach (sodium hypochlorite) with ammonia-based
cleaners?
A. Neutralization of cleaning power
B. Increased risk of fire
C. Staining of the floor surface
D. Creation of toxic chloramine gas
PROFESSIONAL CERTIFICATION
FINAL EXAM 2026/2027 QUESTIONS AND
VERIFIED ANSWERS WITH. JUST
RELEASED
1. When diluting a concentrated chemical with a ratio of 1:64, how many ounces of chemical
are needed for a 5-gallon bucket?
A. 10 ounces
B. 8 ounces
C. 5 ounces
D. 12 ounces
Answer: A
Conceptual Explanation: A 5-gallon bucket contains 640 ounces. 640 divided by 64 equals
10 ounces of concentrate.
2. Which section of the Safety Data Sheet (SDS) provides information on Personal Protective
Equipment (PPE) requirements?
A. Section 8
B. Section 4
,C. Section 11
D. Section 2
Answer: A
Conceptual Explanation: Section 8 of the SDS specifically covers Exposure Controls and
Personal Protection.
3. What is the standard dwell time for a disinfectant to be effective against most common
pathogens, including Norovirus, on a hard surface?
A. 30 seconds
B. 2 minutes
C. 10 minutes
D. 5 minutes
Answer: C
Conceptual Explanation: While some chemicals vary, 10 minutes is the industry standard
for complete disinfection for high-level pathogens.
4. On the pH scale, a floor stripper typically falls into which range?
A. pH 11.0 - 13.0
B. pH 6.0 - 8.0
C. pH 1.0 - 3.0
, D. pH 4.0 - 5.0
Answer: A
Conceptual Explanation: Strippers are highly alkaline (basic) to break down the cross-
linked polymers in floor finishes.
5. Which floor pad color is most appropriate for high-speed burnishing (1500-3000 RPM)?
A. Black
B. White or Natural Hair
C. Green
D. Blue
Answer: B
Conceptual Explanation: White or natural hair pads are non-abrasive and designed for
polishing and thermal buffing.
6. What is the primary risk of mixing bleach (sodium hypochlorite) with ammonia-based
cleaners?
A. Neutralization of cleaning power
B. Increased risk of fire
C. Staining of the floor surface
D. Creation of toxic chloramine gas
