Updated: Jul 02, 2026
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1. The isolation room is supplied with 300 cfm (142 L/s) of HEPA filtered air. The return air grille is located in the ceiling and has been balanced to 150 cfm (71 L/s). The room is monitored with a differential pressure sensor, and the sensor is sending an alarm signal to the nurse's station. Which of the following BEST describes the problem?
A) This is a Protective Environment Room with inadequate toilet room exhaust of 25 cfm (12 L/s)
B) This is an Airborne Infection Isolation Room with inadequate toilet room exhaust of 25 cfm (12 L/s)
C) This is an Airborne Infection Isolation Room with the door to the corridor propped open
D) This is a Protective Environment Room with the door to the corridor propped open
2. A protective environment (PE) suite consists of an anteroom, a patient room, and a dedicated restroom.
Supply air is provided through a non-aspirating unidirectional flow ceiling diffuser in the center of the room, above the foot of the patient bed. There is no return air grille in the patient room, but one is provided in the anteroom. An exhaust grille has been installed in the restroom. How can airflow distribution be improved in this room?
A) Relocate the supply air diffuser above the head of the patient bed
B) Relocate the supply air diffuser above the door to the anteroom
C) Install a supply air grille in the anteroom
D) Install a return air grille in the patient room above the head of the patient bed
3. An Airborne Infection Isolation Room (AIIR) is located in a nursing unit on the second floor of a three-story hospital. Which of the following locations is BEST for an exhaust fan for the AIIR?
A) Above the ceiling of the AIIR
B) In the Level 2 Machine Room
C) On the roof
D) Above the anteroom of the AIIR
4. An airborne infection isolation (AII) patient room has a volume of 1,100 cubic feet (31.15 m³) and requires a minimum supply airflow of 12 air changes per hour (ACH). Airflow across the door to maintain pressurization is 150 CFM (70.8 L/s). Leakage and toilet room exhaust is 130 CFM (61.4 L/s). What airflow should the exhaust fan serving the patient room and toilet room be sized for?
A) 370 CFM (174.6 L/s)
B) 500 CFM (236.0 L/s)
C) 150 CFM (70.8 L/s)
D) 70 CFM (33.0 L/s)
5. Which of the following pathogens is transmitted by direct contact with blood?
A) Hepatitis
B) Aspergillus
C) Tuberculosis
D) Pertussis
Solutions:
| Question # 1 Answer: B | Question # 2 Answer: D | Question # 3 Answer: C | Question # 4 Answer: A | Question # 5 Answer: A |
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