CERTIFIED HEALTHCARE ENVIRONMENTAL SERVICES
PROFESSIONAL (CHESP) practice test 2026 Q@A
1. Which federal regulation specifically mandates that
healthcare facilities maintain a written infection control plan
addressing environmental services?
A. OSHA Bloodborne Pathogens Standard (29 CFR
1910.1030)
B. CDC Guidelines for Environmental Infection Control in
Health-Care Facilities
C. CMS Conditions of Participation for Inpatient Hospital
Services
D. NFPA 101: Life Safety Code
Correct Answer: B
Explanation: The CDC Guidelines for Environmental
Infection Control in Health-Care Facilities explicitly require
written infection control plans addressing environmental
services. While OSHA addresses worker protection and
CMS sets participation conditions, the CDC guidelines
specifically mandate environmental infection control
planning. NFPA focuses on life safety rather than infection
control.
2. A healthcare facility is planning construction in an operating
room. What is the primary critical barrier requirement for
preventing airborne contamination during construction?
A. Minimum 45-minute fire-rated barriers
B. Negative pressure with 100% exhaust to outside
C. Positive pressure with HEPA-filtered air supply
D. Transparent polyethylene sheeting sealed at all edges
Correct Answer: B
, Explanation: Negative pressure with 100% exhaust to
outside is critical for construction areas to prevent
contaminated air from escaping into clinical areas. Positive
pressure is used for protective environments like operating
rooms, not construction zones. Fire-rated barriers address
safety but not airborne contamination. Polyethylene
sheeting alone doesn't control air flow.
3. Which disinfectant concentration is required for effective
elimination of Clostridium difficile spores on environmental
surfaces?
A. 70% isopropyl alcohol
B. 1:100 diluted sodium hypochlorite (500 ppm)
C. 1:10 diluted sodium hypochlorite (5,000 ppm)
D. 0.5% hydrogen peroxide
Correct Answer: C
Explanation: C. difficile spores require high-concentration
chlorine disinfectants at 1:10 dilution (5,000 ppm) for
effective elimination. Lower concentrations (1:100 or 500
ppm) are insufficient for sporicidal activity. Alcohol and
hydrogen peroxide lack sporicidal activity against C.
difficile.
4. In the context of healthcare textile management, what is the
minimum temperature requirement for thermal disinfection
of linens in a washer-disinfector?
A. 140°F (60°C) for 10 minutes
B. 160°F (71°C) for 25 minutes
C. 180°F (82°C) for 15 minutes
, D. 212°F (100°C) for 5 minutes
Correct Answer: B
Explanation: Thermal disinfection requires 160°F (71°C) for
25 minutes to achieve adequate microbial reduction in
healthcare linens. Lower temperatures or shorter durations
don't meet disinfection standards. Higher temperatures
may damage textiles without additional benefit.
5. Which waste category requires disposal in red bags with
biohazard symbols according to OSHA and EPA regulations?
A. Universal waste (batteries, lamps)
B. Infectious waste (cultures, stocks, pathologic waste)
C. Radioactive waste (therapy sources)
D. Pharmaceutical waste (chemotherapy agents)
Correct Answer: B
Explanation: Infectious waste including cultures, stocks,
and pathologic waste requires red biohazard bags per
OSHA and EPA. Universal waste uses different labeling.
Radioactive waste requires yellow containers.
Pharmaceutical waste, especially chemotherapy, requires
specific black or white containers.
6. What is the recommended frequency for terminal cleaning of
intensive care unit rooms after patient discharge?
A. Daily during patient stay
B. Within 1 hour of discharge
C. Within 4 hours of discharge
D. Within 24 hours of discharge
Correct Answer: B
, Explanation: Terminal cleaning should occur within 1 hour
of patient discharge in ICU settings to minimize
environmental contamination and infection transmission
risk. Delayed cleaning increases the risk of healthcare-
associated infections. Daily cleaning occurs during stay but
is not terminal cleaning.
7. Which surface in a healthcare facility is considered a "critical
surface" requiring the highest level of disinfection?
A. Flooring in patient corridors
B. Wall surfaces above 7 feet
C. Surgical instrument tables
D. Window sills in patient rooms
Correct Answer: C
Explanation: Surgical instrument tables are critical
surfaces that directly contact sterile instruments and
require the highest disinfection level. Flooring, high walls,
and window sills are low-touch surfaces with lower
disinfection requirements. Critical surfaces directly impact
patient safety.
8. What is the primary purpose of using quaternary ammonium
compounds (quats) in healthcare environmental cleaning?
A. Sporicidal activity against C. difficile
B. Broad-spectrum bactericidal and fungicidal activity with
low toxicity
C. Virucidal activity against norovirus
D. Tuberlocidal activity for TB prevention
Correct Answer: B
PROFESSIONAL (CHESP) practice test 2026 Q@A
1. Which federal regulation specifically mandates that
healthcare facilities maintain a written infection control plan
addressing environmental services?
A. OSHA Bloodborne Pathogens Standard (29 CFR
1910.1030)
B. CDC Guidelines for Environmental Infection Control in
Health-Care Facilities
C. CMS Conditions of Participation for Inpatient Hospital
Services
D. NFPA 101: Life Safety Code
Correct Answer: B
Explanation: The CDC Guidelines for Environmental
Infection Control in Health-Care Facilities explicitly require
written infection control plans addressing environmental
services. While OSHA addresses worker protection and
CMS sets participation conditions, the CDC guidelines
specifically mandate environmental infection control
planning. NFPA focuses on life safety rather than infection
control.
2. A healthcare facility is planning construction in an operating
room. What is the primary critical barrier requirement for
preventing airborne contamination during construction?
A. Minimum 45-minute fire-rated barriers
B. Negative pressure with 100% exhaust to outside
C. Positive pressure with HEPA-filtered air supply
D. Transparent polyethylene sheeting sealed at all edges
Correct Answer: B
, Explanation: Negative pressure with 100% exhaust to
outside is critical for construction areas to prevent
contaminated air from escaping into clinical areas. Positive
pressure is used for protective environments like operating
rooms, not construction zones. Fire-rated barriers address
safety but not airborne contamination. Polyethylene
sheeting alone doesn't control air flow.
3. Which disinfectant concentration is required for effective
elimination of Clostridium difficile spores on environmental
surfaces?
A. 70% isopropyl alcohol
B. 1:100 diluted sodium hypochlorite (500 ppm)
C. 1:10 diluted sodium hypochlorite (5,000 ppm)
D. 0.5% hydrogen peroxide
Correct Answer: C
Explanation: C. difficile spores require high-concentration
chlorine disinfectants at 1:10 dilution (5,000 ppm) for
effective elimination. Lower concentrations (1:100 or 500
ppm) are insufficient for sporicidal activity. Alcohol and
hydrogen peroxide lack sporicidal activity against C.
difficile.
4. In the context of healthcare textile management, what is the
minimum temperature requirement for thermal disinfection
of linens in a washer-disinfector?
A. 140°F (60°C) for 10 minutes
B. 160°F (71°C) for 25 minutes
C. 180°F (82°C) for 15 minutes
, D. 212°F (100°C) for 5 minutes
Correct Answer: B
Explanation: Thermal disinfection requires 160°F (71°C) for
25 minutes to achieve adequate microbial reduction in
healthcare linens. Lower temperatures or shorter durations
don't meet disinfection standards. Higher temperatures
may damage textiles without additional benefit.
5. Which waste category requires disposal in red bags with
biohazard symbols according to OSHA and EPA regulations?
A. Universal waste (batteries, lamps)
B. Infectious waste (cultures, stocks, pathologic waste)
C. Radioactive waste (therapy sources)
D. Pharmaceutical waste (chemotherapy agents)
Correct Answer: B
Explanation: Infectious waste including cultures, stocks,
and pathologic waste requires red biohazard bags per
OSHA and EPA. Universal waste uses different labeling.
Radioactive waste requires yellow containers.
Pharmaceutical waste, especially chemotherapy, requires
specific black or white containers.
6. What is the recommended frequency for terminal cleaning of
intensive care unit rooms after patient discharge?
A. Daily during patient stay
B. Within 1 hour of discharge
C. Within 4 hours of discharge
D. Within 24 hours of discharge
Correct Answer: B
, Explanation: Terminal cleaning should occur within 1 hour
of patient discharge in ICU settings to minimize
environmental contamination and infection transmission
risk. Delayed cleaning increases the risk of healthcare-
associated infections. Daily cleaning occurs during stay but
is not terminal cleaning.
7. Which surface in a healthcare facility is considered a "critical
surface" requiring the highest level of disinfection?
A. Flooring in patient corridors
B. Wall surfaces above 7 feet
C. Surgical instrument tables
D. Window sills in patient rooms
Correct Answer: C
Explanation: Surgical instrument tables are critical
surfaces that directly contact sterile instruments and
require the highest disinfection level. Flooring, high walls,
and window sills are low-touch surfaces with lower
disinfection requirements. Critical surfaces directly impact
patient safety.
8. What is the primary purpose of using quaternary ammonium
compounds (quats) in healthcare environmental cleaning?
A. Sporicidal activity against C. difficile
B. Broad-spectrum bactericidal and fungicidal activity with
low toxicity
C. Virucidal activity against norovirus
D. Tuberlocidal activity for TB prevention
Correct Answer: B
