CUSTODIAN EXAM QUESTIONS WITH 100% SOLVED ANSWERS
Comprehensive Advanced Practice Examination for Custodial
Professionals
TABLE OF CONTENTS
Section Topic Area Questions
I Building Cleaning Procedures & Techniques 1–20
II Chemical Safety & Hazard Communication 21–35
III Floor Care & Maintenance 36–50
IV Plumbing Systems & Maintenance 51–60
V Electrical Systems & Lighting 61–70
VI HVAC & Boiler Operations 71–80
VII Fire Safety & Emergency Response 81–95
VIII Equipment Operation & Maintenance 96–105
IX Safety & OSHA Compliance 106–120
X Supervision, Record Keeping & Administration 121–135
XI Building Systems & Structural Maintenance 136–150
SECTION I: BUILDING CLEANING PROCEDURES & TECHNIQUES
🟢 1. What is the most effective method for removing heavy grease buildup from commercial
kitchen countertops?
, A) Vinegar solution applied with a sponge
B) Plain water with a scrub brush
C) TriSodium phosphate (TSP) applied as a degreaser
D) Baking soda paste left to absorb overnight
🔴🔴 C) TriSodium phosphate (TSP) applied as a degreaser
Rationale: TSP is a powerful degreaser specifically formulated to break down heavy grease and oil
deposits. Vinegar neutralizes odors but is ineffective against heavy grease, water cannot break down
grease bonds, and baking soda has limited grease-cutting capability.
🟢 2. Why should custodians avoid drenching linoleum flooring while mopping?
A) Drenching prevents mold and mildew growth
B) Drenching helps in better cleaning and maintenance
C) Drenching is necessary for proper disinfection
D) Drenching can damage the material and lead to deterioration
🔴🔴 D) Drenching can damage the material and lead to deterioration
Rationale: Linoleum is susceptible to water damage. Excessive moisture can seep into seams and edges,
causing the material to swell, warp, or delaminate. Prolonged exposure to standing water can break
down the adhesive and lead to premature floor failure.
🟢 3. What is the correct frequency for cleaning drinking water fountains in a public facility?
A) Weekly
B) Bi-weekly
C) Daily
D) Monthly
🔴🔴 C) Daily
Rationale: Drinking water fountains are high-touch surfaces that can harbor bacteria and viruses. Daily
cleaning is the standard practice to ensure public health and safety in custodial maintenance.
🟢 4. What is the primary purpose of using a microfiber cloth in custodial cleaning tasks?
A) To absorb large amounts of liquid quickly
, B) To attract and hold dust and dirt through electrostatic action
C) To disinfect surfaces with chemical residue
D) To polish metal fixtures to a high shine
🔴🔴 B) To attract and hold dust and dirt through electrostatic action
Rationale: Microfiber cloths have fine fibers that create a positive electrostatic charge when rubbed,
effectively trapping dust particles without spreading them. This makes them ideal for dry dusting and
low-residue cleaning.
🟢 5. When using a dust mop, what is the correct technique?
A) Keep it angled and shake every 5 minutes
B) Keep it flat and shake every minute
C) Keep it elevated and shake every 2 minutes
D) Keep it flat and shake only when finished
🔴🔴 B) Keep it flat and shake every minute
Rationale: A dust mop must be kept flat against the floor to maximize surface contact and pickup
efficiency. Shaking every minute prevents the mop from becoming overloaded with dust, which would
reduce its effectiveness and cause streaking.
🟢 6. What should a custodian do if they splash mopping water onto a baseboard?
A) Leave it to air dry
B) Wipe it off immediately with a rag
C) Apply additional water to dilute the splash
D) Ignore it and continue mopping
🔴🔴 B) Wipe it off immediately with a rag
Rationale: Promptly wiping water from baseboards prevents moisture damage, staining, and potential
mold growth. Leaving water to sit can cause wood baseboards to swell or painted surfaces to peel.
🟢 7. What is the best way to clean carpeted surfaces in a high-traffic area?
A) Steam cleaning only
B) Vacuum cleaner with regular maintenance
, C) Spot cleaning with bleach
D) Sweeping with a broom
🔴🔴 B) Vacuum cleaner with regular maintenance
Rationale: Vacuuming is the most effective and efficient method for routine carpet maintenance. It
removes embedded dirt and debris before they can damage carpet fibers. Steam cleaning should
supplement, not replace, regular vacuuming.
🟢 8. How often should restroom facilities be checked and cleaned in a high-traffic public building?
A) Once per shift
B) Every 2 hours
C) Multiple times per day with frequent spot checks
D) Only at the end of the day
🔴🔴 C) Multiple times per day with frequent spot checks
Rationale: High-traffic restrooms require frequent attention throughout the day to maintain sanitation
standards, control odors, and prevent the spread of illness. A schedule of multiple checks with spot
cleaning between full cleanings is the industry standard.
🟢 9. What is a squeegee and what is its primary use?
A) A long-handled brush for scrubbing floors
B) A short bar with a rubber blade used to remove water from surfaces
C) A tool for applying wax to floors
D) A vacuum attachment for carpet cleaning
🔴🔴 B) A short bar with a rubber blade used to remove water from surfaces
Rationale: A squeegee consists of a handle with a rubber blade designed to push water and cleaning
solutions from smooth surfaces such as glass, tile, and floors, leaving them streak-free and nearly dry.
🟢 10. What is the proper procedure for cleaning a blood spill in a custodial setting?
A) Wipe it up immediately with bare hands and paper towels
B) Use PPE, absorb with disposable materials, disinfect, and dispose as biohazard
C) Cover it with sawdust and sweep later
Comprehensive Advanced Practice Examination for Custodial
Professionals
TABLE OF CONTENTS
Section Topic Area Questions
I Building Cleaning Procedures & Techniques 1–20
II Chemical Safety & Hazard Communication 21–35
III Floor Care & Maintenance 36–50
IV Plumbing Systems & Maintenance 51–60
V Electrical Systems & Lighting 61–70
VI HVAC & Boiler Operations 71–80
VII Fire Safety & Emergency Response 81–95
VIII Equipment Operation & Maintenance 96–105
IX Safety & OSHA Compliance 106–120
X Supervision, Record Keeping & Administration 121–135
XI Building Systems & Structural Maintenance 136–150
SECTION I: BUILDING CLEANING PROCEDURES & TECHNIQUES
🟢 1. What is the most effective method for removing heavy grease buildup from commercial
kitchen countertops?
, A) Vinegar solution applied with a sponge
B) Plain water with a scrub brush
C) TriSodium phosphate (TSP) applied as a degreaser
D) Baking soda paste left to absorb overnight
🔴🔴 C) TriSodium phosphate (TSP) applied as a degreaser
Rationale: TSP is a powerful degreaser specifically formulated to break down heavy grease and oil
deposits. Vinegar neutralizes odors but is ineffective against heavy grease, water cannot break down
grease bonds, and baking soda has limited grease-cutting capability.
🟢 2. Why should custodians avoid drenching linoleum flooring while mopping?
A) Drenching prevents mold and mildew growth
B) Drenching helps in better cleaning and maintenance
C) Drenching is necessary for proper disinfection
D) Drenching can damage the material and lead to deterioration
🔴🔴 D) Drenching can damage the material and lead to deterioration
Rationale: Linoleum is susceptible to water damage. Excessive moisture can seep into seams and edges,
causing the material to swell, warp, or delaminate. Prolonged exposure to standing water can break
down the adhesive and lead to premature floor failure.
🟢 3. What is the correct frequency for cleaning drinking water fountains in a public facility?
A) Weekly
B) Bi-weekly
C) Daily
D) Monthly
🔴🔴 C) Daily
Rationale: Drinking water fountains are high-touch surfaces that can harbor bacteria and viruses. Daily
cleaning is the standard practice to ensure public health and safety in custodial maintenance.
🟢 4. What is the primary purpose of using a microfiber cloth in custodial cleaning tasks?
A) To absorb large amounts of liquid quickly
, B) To attract and hold dust and dirt through electrostatic action
C) To disinfect surfaces with chemical residue
D) To polish metal fixtures to a high shine
🔴🔴 B) To attract and hold dust and dirt through electrostatic action
Rationale: Microfiber cloths have fine fibers that create a positive electrostatic charge when rubbed,
effectively trapping dust particles without spreading them. This makes them ideal for dry dusting and
low-residue cleaning.
🟢 5. When using a dust mop, what is the correct technique?
A) Keep it angled and shake every 5 minutes
B) Keep it flat and shake every minute
C) Keep it elevated and shake every 2 minutes
D) Keep it flat and shake only when finished
🔴🔴 B) Keep it flat and shake every minute
Rationale: A dust mop must be kept flat against the floor to maximize surface contact and pickup
efficiency. Shaking every minute prevents the mop from becoming overloaded with dust, which would
reduce its effectiveness and cause streaking.
🟢 6. What should a custodian do if they splash mopping water onto a baseboard?
A) Leave it to air dry
B) Wipe it off immediately with a rag
C) Apply additional water to dilute the splash
D) Ignore it and continue mopping
🔴🔴 B) Wipe it off immediately with a rag
Rationale: Promptly wiping water from baseboards prevents moisture damage, staining, and potential
mold growth. Leaving water to sit can cause wood baseboards to swell or painted surfaces to peel.
🟢 7. What is the best way to clean carpeted surfaces in a high-traffic area?
A) Steam cleaning only
B) Vacuum cleaner with regular maintenance
, C) Spot cleaning with bleach
D) Sweeping with a broom
🔴🔴 B) Vacuum cleaner with regular maintenance
Rationale: Vacuuming is the most effective and efficient method for routine carpet maintenance. It
removes embedded dirt and debris before they can damage carpet fibers. Steam cleaning should
supplement, not replace, regular vacuuming.
🟢 8. How often should restroom facilities be checked and cleaned in a high-traffic public building?
A) Once per shift
B) Every 2 hours
C) Multiple times per day with frequent spot checks
D) Only at the end of the day
🔴🔴 C) Multiple times per day with frequent spot checks
Rationale: High-traffic restrooms require frequent attention throughout the day to maintain sanitation
standards, control odors, and prevent the spread of illness. A schedule of multiple checks with spot
cleaning between full cleanings is the industry standard.
🟢 9. What is a squeegee and what is its primary use?
A) A long-handled brush for scrubbing floors
B) A short bar with a rubber blade used to remove water from surfaces
C) A tool for applying wax to floors
D) A vacuum attachment for carpet cleaning
🔴🔴 B) A short bar with a rubber blade used to remove water from surfaces
Rationale: A squeegee consists of a handle with a rubber blade designed to push water and cleaning
solutions from smooth surfaces such as glass, tile, and floors, leaving them streak-free and nearly dry.
🟢 10. What is the proper procedure for cleaning a blood spill in a custodial setting?
A) Wipe it up immediately with bare hands and paper towels
B) Use PPE, absorb with disposable materials, disinfect, and dispose as biohazard
C) Cover it with sawdust and sweep later
