CALIFORNIA CUSTODIAN EXAM
STUDY GUIDE QUESTIONS AND
VERIFIED ANSWERS WITH. JUST
RELEASED
1. What does the acronym SDS stand for under the Globally Harmonized System (GHS)?
A. Standard Disposal Sheet
B. Standardized Data Summary
C. Safety Delivery System
D. Safety Data Sheet
Answer: D
Conceptual Explanation: An SDS (Safety Data Sheet) provides detailed information about
a chemical’s properties, hazards, and safety precautions.
2. Mixing chlorine bleach with ammonia produces which dangerous substance?
A. Toxic chloramine vapor
B. Hydrochloric acid
C. Carbon dioxide gas
D. Inert salt water
,Answer: A
Conceptual Explanation: Mixing bleach and ammonia creates chloramine gas, which is
highly toxic and can cause respiratory distress or death.
3. On the pH scale, which range indicates a highly alkaline (basic) cleaning solution?
A. 11 to 14
B. 6 to 8
C. 0 to 2
D. 4 to 6
Answer: A
Conceptual Explanation: The pH scale ranges from 0 to 14. 0-6 is acidic, 7 is neutral, and
8-14 is alkaline. Heavy-duty degreasers and strippers are typically 11-14.
4. Which floor machine pad is typically the most aggressive and used for stripping wax?
A. Black
B. Red
C. White
D. Tan
Answer: A
, Conceptual Explanation: The color coding of floor pads indicates abrasiveness; black is
the most aggressive for stripping, while white is for polishing.
5. When using a fire extinguisher, what does the acronym ‘PASS’ stand for?
A. Point, Aim, Spray, Sweep
B. Pull, Aim, Squeeze, Sweep
C. Pull, Activate, Spray, Secure
D. Push, Aim, Squeeze, Stop
Answer: B
Conceptual Explanation: PASS stands for Pull the pin, Aim at the base of the fire, Squeeze
the handle, and Sweep from side to side.
6. What is the primary purpose of a HEPA filter in a vacuum cleaner?
A. To trap very small particles and prevent them from being exhausted
B. To increase the motor’s suction power
C. To reduce the noise level of the machine
D. To cool the internal electrical components
Answer: A
Conceptual Explanation: HEPA (High-Efficiency Particulate Air) filters trap 99.97% of
particles 0.3 microns or larger, improving indoor air quality.
STUDY GUIDE QUESTIONS AND
VERIFIED ANSWERS WITH. JUST
RELEASED
1. What does the acronym SDS stand for under the Globally Harmonized System (GHS)?
A. Standard Disposal Sheet
B. Standardized Data Summary
C. Safety Delivery System
D. Safety Data Sheet
Answer: D
Conceptual Explanation: An SDS (Safety Data Sheet) provides detailed information about
a chemical’s properties, hazards, and safety precautions.
2. Mixing chlorine bleach with ammonia produces which dangerous substance?
A. Toxic chloramine vapor
B. Hydrochloric acid
C. Carbon dioxide gas
D. Inert salt water
,Answer: A
Conceptual Explanation: Mixing bleach and ammonia creates chloramine gas, which is
highly toxic and can cause respiratory distress or death.
3. On the pH scale, which range indicates a highly alkaline (basic) cleaning solution?
A. 11 to 14
B. 6 to 8
C. 0 to 2
D. 4 to 6
Answer: A
Conceptual Explanation: The pH scale ranges from 0 to 14. 0-6 is acidic, 7 is neutral, and
8-14 is alkaline. Heavy-duty degreasers and strippers are typically 11-14.
4. Which floor machine pad is typically the most aggressive and used for stripping wax?
A. Black
B. Red
C. White
D. Tan
Answer: A
, Conceptual Explanation: The color coding of floor pads indicates abrasiveness; black is
the most aggressive for stripping, while white is for polishing.
5. When using a fire extinguisher, what does the acronym ‘PASS’ stand for?
A. Point, Aim, Spray, Sweep
B. Pull, Aim, Squeeze, Sweep
C. Pull, Activate, Spray, Secure
D. Push, Aim, Squeeze, Stop
Answer: B
Conceptual Explanation: PASS stands for Pull the pin, Aim at the base of the fire, Squeeze
the handle, and Sweep from side to side.
6. What is the primary purpose of a HEPA filter in a vacuum cleaner?
A. To trap very small particles and prevent them from being exhausted
B. To increase the motor’s suction power
C. To reduce the noise level of the machine
D. To cool the internal electrical components
Answer: A
Conceptual Explanation: HEPA (High-Efficiency Particulate Air) filters trap 99.97% of
particles 0.3 microns or larger, improving indoor air quality.
