ADVANCED CALIFORNIA CUSTODIAN
PROFESSIONAL EXAM QUESTIONS
AND VERIFIED ANSWERS WITH. JUST
RELEASED
1. What is the result of mixing bleach (sodium hypochlorite) with ammonia?
A. A highly effective disinfectant for bathrooms
B. A neutralized solution safe for skin contact
C. A surfactant that removes heavy grease
D. The production of toxic chloramine gas
Answer: D
Conceptual Explanation: Mixing bleach and ammonia creates chloramine gas, which is
toxic and can cause respiratory failure or death.
2. When stripping a floor, why is it critical to check the pH level after rinsing?
A. To ensure the floor is acidic enough for wax
B. To verify that all the water has evaporated
C. To ensure the floor is neutral so the finish bonds correctly
D. To increase the slip resistance of the bare tile
,Answer: C
Conceptual Explanation: Strippers are highly alkaline. If the floor is not neutralized (pH
~7) before waxing, the new finish will fail to bond or will turn yellow/powder.
3. According to Cal/OSHA, how often must a Custodial Exposure Control Plan for bloodborne
pathogens be reviewed?
A. Every six months
B. Every two years
C. Only when an incident occurs
D. Annually
Answer: D
Conceptual Explanation: Cal/OSHA requires an annual review and update of the Exposure
Control Plan to reflect new tasks or procedures.
4. In the GHS Safety Data Sheet (SDS) system, which section details First-Aid measures?
A. Section 1
B. Section 8
C. Section 4
D. Section 12
Answer: C
, Conceptual Explanation: Section 4 of the SDS provides necessary first-aid instructions for
untrained responders during an accidental exposure.
5. What is the ‘4-to-1 rule’ in ladder safety?
A. Always keep 4 points of contact while climbing 1 step
B. A ladder must support 4 times the weight of the user
C. You must check the ladder for 4 specific types of damage every 1 hour
D. For every 4 feet of height, the base should be 1 foot away from the wall
Answer: D
Conceptual Explanation: The 4-to-1 rule dictates the safe angle for an extension ladder:
for every 4 feet of vertical height, the base should be 1 foot out.
6. Which type of fire extinguisher is specifically designed for electrical fires?
A. Class A
B. Class C
C. Class B
D. Class K
Answer: B
Conceptual Explanation: Class C extinguishers are rated for energized electrical
equipment fires as they use non-conductive extinguishing agents.
PROFESSIONAL EXAM QUESTIONS
AND VERIFIED ANSWERS WITH. JUST
RELEASED
1. What is the result of mixing bleach (sodium hypochlorite) with ammonia?
A. A highly effective disinfectant for bathrooms
B. A neutralized solution safe for skin contact
C. A surfactant that removes heavy grease
D. The production of toxic chloramine gas
Answer: D
Conceptual Explanation: Mixing bleach and ammonia creates chloramine gas, which is
toxic and can cause respiratory failure or death.
2. When stripping a floor, why is it critical to check the pH level after rinsing?
A. To ensure the floor is acidic enough for wax
B. To verify that all the water has evaporated
C. To ensure the floor is neutral so the finish bonds correctly
D. To increase the slip resistance of the bare tile
,Answer: C
Conceptual Explanation: Strippers are highly alkaline. If the floor is not neutralized (pH
~7) before waxing, the new finish will fail to bond or will turn yellow/powder.
3. According to Cal/OSHA, how often must a Custodial Exposure Control Plan for bloodborne
pathogens be reviewed?
A. Every six months
B. Every two years
C. Only when an incident occurs
D. Annually
Answer: D
Conceptual Explanation: Cal/OSHA requires an annual review and update of the Exposure
Control Plan to reflect new tasks or procedures.
4. In the GHS Safety Data Sheet (SDS) system, which section details First-Aid measures?
A. Section 1
B. Section 8
C. Section 4
D. Section 12
Answer: C
, Conceptual Explanation: Section 4 of the SDS provides necessary first-aid instructions for
untrained responders during an accidental exposure.
5. What is the ‘4-to-1 rule’ in ladder safety?
A. Always keep 4 points of contact while climbing 1 step
B. A ladder must support 4 times the weight of the user
C. You must check the ladder for 4 specific types of damage every 1 hour
D. For every 4 feet of height, the base should be 1 foot away from the wall
Answer: D
Conceptual Explanation: The 4-to-1 rule dictates the safe angle for an extension ladder:
for every 4 feet of vertical height, the base should be 1 foot out.
6. Which type of fire extinguisher is specifically designed for electrical fires?
A. Class A
B. Class C
C. Class B
D. Class K
Answer: B
Conceptual Explanation: Class C extinguishers are rated for energized electrical
equipment fires as they use non-conductive extinguishing agents.
