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, CALIFORNIA CUSTODIAN CERTIFICATION EXAM –
QUESTIONS AND VERIFIED ANSWERS WITH RATIONALES
JUST RELEASED.PDF
Section 1: Cleaning & Disinfection
1. What is the primary purpose of a disinfectant?
A. To remove visible dirt
B. To kill or inactivate pathogenic microorganisms ✅
C. To deodorize surfaces
D. To polish surfaces
Answer: B ✅ — Disinfectants are designed to destroy or
irreversibly inactivate infectious fungi and bacteria.
2. What is the difference between cleaning and disinfecting?
A. Cleaning kills germs; disinfecting removes dirt
B. Cleaning removes soil; disinfecting kills pathogens ✅
C. They are the same process
D. Disinfecting removes soil; cleaning kills pathogens
Answer: B ✅ — Cleaning physically removes soil, while
disinfecting kills microorganisms.
3. Why must a surface be cleaned before it is disinfected?
A. Disinfectants work better on dirty surfaces
B. Organic matter can inactivate disinfectants ✅
C. Cleaning is required by law
D. Disinfectants are only for clean surfaces
,
, CALIFORNIA CUSTODIAN CERTIFICATION EXAM –
QUESTIONS AND VERIFIED ANSWERS WITH RATIONALES
JUST RELEASED.PDF
Section 1: Cleaning & Disinfection
1. What is the primary purpose of a disinfectant?
A. To remove visible dirt
B. To kill or inactivate pathogenic microorganisms ✅
C. To deodorize surfaces
D. To polish surfaces
Answer: B ✅ — Disinfectants are designed to destroy or
irreversibly inactivate infectious fungi and bacteria.
2. What is the difference between cleaning and disinfecting?
A. Cleaning kills germs; disinfecting removes dirt
B. Cleaning removes soil; disinfecting kills pathogens ✅
C. They are the same process
D. Disinfecting removes soil; cleaning kills pathogens
Answer: B ✅ — Cleaning physically removes soil, while
disinfecting kills microorganisms.
3. Why must a surface be cleaned before it is disinfected?
A. Disinfectants work better on dirty surfaces
B. Organic matter can inactivate disinfectants ✅
C. Cleaning is required by law
D. Disinfectants are only for clean surfaces
