CALIFORNIA CUSTODIAN
CERTIFICATION EXAM 2026/2027
QUESTIONS AND VERIFIED ANSWERS
WITH. JUST RELEASED
1. According to the GHS (Globally Harmonized System), which signal word indicates a more
severe hazard category?
A. Caution
B. Warning
C. Notice
D. Danger
Answer: D
Conceptual Explanation: In GHS labeling, ‘Danger’ is used for more severe hazards, while
‘Warning’ is used for less severe ones. ‘Caution’ is not a standard GHS signal word.
2. When mixing cleaning chemicals, what is the chemical result of combining bleach (sodium
hypochlorite) and ammonia?
A. Carbon dioxide gas
B. Hydrochloric acid
C. Chloramine gas
,D. Sodium chloride crystals
Answer: C
Conceptual Explanation: Mixing bleach and ammonia creates toxic chloramine vapors,
which can cause severe respiratory distress and lung damage.
3. What is the primary purpose of a ‘neutralizer’ in the floor stripping and refinishing process?
A. To increase the gloss level of the final coat
B. To harden the subfloor material
C. To act as a bonding agent for the new wax
D. To lower the pH of the floor surface after using high-alkaline strippers
Answer: D
Conceptual Explanation: Strippers are highly alkaline (high pH). A neutralizer brings the
pH back to 7 (neutral) to ensure the new finish adheres properly and doesn’t powder.
4. According to Cal/OSHA standards, how often must an Exposure Control Plan for
Bloodborne Pathogens be reviewed and updated?
A. Every 6 months
B. Annually
C. Every 2 years
D. Only when a new employee is hired
, Answer: B
Conceptual Explanation: OSHA regulations require that the Exposure Control Plan be
reviewed and updated at least annually to reflect changes in technology and procedures.
5. What pH range is typical for a heavy-duty degreaser?
A. 11 to 13
B. 4 to 6
C. 7 to 8
D. 1 to 3
Answer: A
Conceptual Explanation: Degreasers are typically highly alkaline (bases) with a pH
between 11 and 13 to effectively break down fats, oils, and greases.
6. In the context of Integrated Pest Management (IPM), what is the first step in addressing a
pest problem?
A. Applying a broad-spectrum pesticide
B. Inspection and monitoring
C. Calling a professional exterminator
D. Setting up chemical bait stations
Answer: B
CERTIFICATION EXAM 2026/2027
QUESTIONS AND VERIFIED ANSWERS
WITH. JUST RELEASED
1. According to the GHS (Globally Harmonized System), which signal word indicates a more
severe hazard category?
A. Caution
B. Warning
C. Notice
D. Danger
Answer: D
Conceptual Explanation: In GHS labeling, ‘Danger’ is used for more severe hazards, while
‘Warning’ is used for less severe ones. ‘Caution’ is not a standard GHS signal word.
2. When mixing cleaning chemicals, what is the chemical result of combining bleach (sodium
hypochlorite) and ammonia?
A. Carbon dioxide gas
B. Hydrochloric acid
C. Chloramine gas
,D. Sodium chloride crystals
Answer: C
Conceptual Explanation: Mixing bleach and ammonia creates toxic chloramine vapors,
which can cause severe respiratory distress and lung damage.
3. What is the primary purpose of a ‘neutralizer’ in the floor stripping and refinishing process?
A. To increase the gloss level of the final coat
B. To harden the subfloor material
C. To act as a bonding agent for the new wax
D. To lower the pH of the floor surface after using high-alkaline strippers
Answer: D
Conceptual Explanation: Strippers are highly alkaline (high pH). A neutralizer brings the
pH back to 7 (neutral) to ensure the new finish adheres properly and doesn’t powder.
4. According to Cal/OSHA standards, how often must an Exposure Control Plan for
Bloodborne Pathogens be reviewed and updated?
A. Every 6 months
B. Annually
C. Every 2 years
D. Only when a new employee is hired
, Answer: B
Conceptual Explanation: OSHA regulations require that the Exposure Control Plan be
reviewed and updated at least annually to reflect changes in technology and procedures.
5. What pH range is typical for a heavy-duty degreaser?
A. 11 to 13
B. 4 to 6
C. 7 to 8
D. 1 to 3
Answer: A
Conceptual Explanation: Degreasers are typically highly alkaline (bases) with a pH
between 11 and 13 to effectively break down fats, oils, and greases.
6. In the context of Integrated Pest Management (IPM), what is the first step in addressing a
pest problem?
A. Applying a broad-spectrum pesticide
B. Inspection and monitoring
C. Calling a professional exterminator
D. Setting up chemical bait stations
Answer: B
