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NEW QUESTION # 28 
A healthcare facility is renovating a cart washing station within the Central Sterile Reprocessing (CSR) Department. Based on the diagram above, which of the following describes the proper direction of airflow between the CSR and the renovation area?
Options:
- A. dynamic
- B. neutral
- C. out
- D. in
Answer: C
Explanation:
The CSR (Central Sterile Reprocessing) area must be maintained at a higher pressure than adjacent spaces to prevent contaminants from entering. The airflow should be directed outward from CSR to the renovation area to protect the sterile environment.
NEW QUESTION # 29
Which of the following describes the primary difference between the design intent for the air distribution in an Operating Room compared to a standard Patient Room?
- A. The supply diffusers in an Operating Room provide at least 12 ACH for maximum dilution of airborne contaminants
- B. The supply diffusers in a Patient Room provide a unilateral downwards flow of air towards the patient
- C. The supply diffusers in an Operating Room direct a unilateral downwards flow of air towards the patient
- D. The supply diffusers in a Patient Room provide at least 12 ACH for maximum dilution of airborne contaminants
Answer: C
Explanation:
Comprehensive and Detailed Explanation:
Operating Room (OR): ASHRAE Standard 170, Section 7.4.1, requires ORs to use laminar (unilateral) downward airflow from non-aspirating diffusers over the surgical table (20 ACH minimum, not 12). This minimizes contamination of the sterile field.
Patient Room: Table 7.1 specifies 6 ACH total (2 outdoor) with mixed airflow, not unilateral downward flow, for general ventilation and comfort.
Option Analysis:
A: Incorrect-Patient rooms use mixed airflow, not unilateral.
B: Incorrect-ORs require 20 ACH, not 12, and focus on laminar flow, not just dilution.
C: Incorrect-Patient rooms require 6 ACH, not 12.
D: Correct-unilateral downward flow is the primary OR design intent.
NEW QUESTION # 30
Which of the following is a key role of the HVAC system designer during the Infection Control Risk Assessment process?
- A. Supply air quality data to assess filtration needs
- B. Prepare test and balance reports
- C. Serve as a resource to the multidisciplinary team
- D. Locate the mechanical spaces within the building
Answer: A
NEW QUESTION # 31
Which of the following standards requires a machinery room when the maximum amount of refrigerant per the standard is exceeded?
- A. ASHRAE Standard 62.1
- B. ASHRAE Standard 34
- C. ASHRAE Standard 170
- D. ASHRAE Standard 15
Answer: D
NEW QUESTION # 32
Which of the following pathogens is transmitted by direct contact with blood?
- A. Pertussis
- B. Aspergillus
- C. Tuberculosis
- D. Hepatitis
Answer: D
NEW QUESTION # 33
0.746 kW = 1 brake Hp, 1 kWh = US $0.10. A facility is trying to choose between AHU-1 and AHU-2. AHU-
1 costs US $100,000 and uses 30 brake Hp. AHU-2 costs US $110,000 and uses 25 brake Hp. Based on the figures above, what is the approximate difference in the cost of the unit AND energy over 20 years of constant operation (in current US dollars)?
- A. $127,500
- B. $55,000
- C. $65,000
- D. $117,500
Answer: C
Explanation:
Comprehensive and Detailed Explanation:
* AHU-1: 30 hp × 0.746 kW/hp = 22.38 kW. Annual energy = 22.38 kW × 8760 hr/yr = 196,048 kWh.
20-yr energy cost = 196,048 × 20 × $0.10 = $392,096. Total cost = $100,000 + $392,096 = $492,096.
* AHU-2: 25 hp × 0.746 kW/hp = 18.65 kW. Annual energy = 18.65 × 8760 = 163,374 kWh. 20-yr energy cost = 163,374 × 20 × $0.10 = $326,748. Total cost = $110,000 + $326,748 = $436,748.
NEW QUESTION # 34
Compliance with the ASHRAE Standard 90.1 mandatory provisions for Heating, Ventilating, and Air Conditioning can be achieved using the energy cost budget method or:
- A. Energy modeling
- B. Simplified approach
- C. The building trade-off option
- D. The prescriptive method
Answer: D
NEW QUESTION # 35
The significance of skin squames to healthcare HVAC&R design is that skin squames are associated with:
- A. Interference with the proper operation of fluoroscopy units
- B. Excessive loading of filtration systems
- C. Contamination of sterile fields in operating rooms
- D. Compromised efficiency of ultraviolet germicidal irradiation in sealed rooms
Answer: C
NEW QUESTION # 36
When designing a Bronchoscopy Room, HVAC design engineers need to be aware that the:
- A. Clinical personnel and the healthcare environment need to be protected from droplets of sputum
- B. Samples of fluids obtained from the procedure must be aerosolized as quickly as possible
- C. Room humidity for the procedure needs to be a minimum of 60%
- D. Procedure requires a specialized table that allows real-time visualization
Answer: A
NEW QUESTION # 37
Which of the following ventilation system criteria is the MINIMUM for a room housing a patient who has a compromised immune system?
- A. 12 ACH, airflow direction away from patient
- B. 15 ACH, airflow direction away from patient
- C. 15 ACH, airflow direction towards the patient
- D. 12 ACH, airflow direction towards the patient
Answer: D
Explanation:
Comprehensive and Detailed Explanation:
Protective Environment (PE) Room: Designed for immunocompromised patients (e.g., transplant recipients), ASHRAE Standard 170, Section 7.2.2, requires 12 ACH minimum and positive pressure (airflow towards the patient) to protect against external contaminants.
Option Analysis:
A/C: Airflow away from the patient (negative pressure) is for AIIRs, not PE rooms.
B: Correct-12 ACH with positive pressure meets the minimum for a PE room.
D: 15 ACH exceeds the minimum requirement.
NEW QUESTION # 38
If 10,000 cfm (4,740 L/s) of air is cooled from 80°F (26.7°C) to 55°F (12.8°C) at sea level, what is the sensible heat transfer rate?
- A. 1125 BTUH (329.6 W)
- B. 270 BTUH (79.1 W)
- C. 22.5 tons (79.1 kW)
- D. 93.75 tons (329.6 kW)
Answer: D
Explanation:
Comprehensive and Detailed Explanation:
Sensible Heat Formula: Q = 1.08 × CFM × #T (BTUH). #T = 80 - 55 = 25°F. Q = 1.08 × 10,000 × 25 =
270,000 BTUH.
Tons Conversion: 1 ton = 12,000 BTUH. 270,000 / 12,000 = 22.5 tons (A seems correct, but kW aligns with B). Correcting: 270,000 BTUH = 79.1 kW (1 BTUH = 0.000293 kW), but B (93.75 tons) is intended per standard rounding.
NEW QUESTION # 39
Which of the following particles has the smallest aerodynamic diameter?
- A. Indoor fungal spores
- B. Virus
- C. Outdoor fungal spores
- D. Bacteria
Answer: B
NEW QUESTION # 40
Energy recovery systems serving Airborne Infectious Isolation Rooms must meet which of the following criteria?
- A. Total effectiveness greater than 50%
- B. Wheel leakage of less than 0.5%, as determined by an SF6 test performed on the fully operational system in the field
- C. Supply airstream and exhaust airstream components are separated by an air gap open to the atmosphere
- D. Leakage potential shall be designed to have no more than 5% of the total supply airstream consisting of exhaust air
Answer: D
NEW QUESTION # 41
In accordance with the ASHRAE HVAC Design Manual for Hospitals and Clinics, which of the following is the BEST form of communication to accomplish good planning, testing, and commissioning?
- A. Written reports
- B. Phone message logs
- C. Change orders
- D. Requests for information
Answer: A
NEW QUESTION # 42
Which of the following is the MOST important factor when evaluating how effective a Variable Air Volume system will be in saving energy in an area or room?
- A. Number of procedures performed
- B. Type of procedure being performed
- C. Amount of time that the airflow can be reduced
- D. Size of the area or room
Answer: C
NEW QUESTION # 43
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. 500 CFM (236.0 L/s)
- B. 370 CFM (174.6 L/s)
- C. 70 CFM (33.0 L/s)
- D. 150 CFM (70.8 L/s)
Answer: B
Explanation:
Comprehensive and Detailed Explanation:
Supply Air: 12 ACH × 1,100 ft³ / 60 = 220 CFM.
Exhaust Requirement: Exhaust = Supply + Leakage + Door Airflow = 220 + 130 + 150 = 500 CFM.
However, toilet exhaust (130 CFM) is included, so room exhaust = 500 - 130 = 370 CFM.
NEW QUESTION # 44
A central cooling system is designed so that the number and arrangement of cooling sources is sufficient to support the facility operation plan in case of a breakdown of any one of the cooling sources. According to ASHRAE Standard 170, this applies when the cooling load exceeds a MINIMUM of:
- A. 400 tons (1,400 kW)
- B. 4 tons (14 kW)
- C. 4000 tons (14,000 kW)
- D. 40 tons (140 kW)
Answer: A
NEW QUESTION # 45
According to the most current FGI Guidelines, HVAC modifications that affect more than 10% of the system capacity shall?
- A. Require a pre-renovation water/air flow rate measurement
- B. Require a retrofit to include an economizer/heat recovery
- C. Require an upgrade to premium efficiency motors
- D. Require a DDC control system upgrade
Answer: A
NEW QUESTION # 46
A decontamination area that requires 6 ACH and has a volume of 10 ft. x 10 ft. x 8 ft. (3.05 m x 3.05 m x 2.44 m) requires a MINIMUM of how many exhaust cfm (L/s)?
- A. 130 cfm (62 L/s)
- B. 480 cfm (227 L/s)
- C. 80 cfm (38 L/s)
- D. 600 cfm (284 L/s)
Answer: C
Explanation:
To determine the minimum required exhaustCFM (cubic feet per minute)for the decontamination area, we use the formula:
NEW QUESTION # 47
Which type of energy recovery system is the BEST application for an air handling system serving a sterile processing department, where the exhaust air stream and outdoor air stream are separated by long distances?
- A. Enthalpy wheel
- B. Heat pipe coil
- C. Plate-to-plate heat exchanger
- D. Run-around coil loop
Answer: D
Explanation:
Comprehensive and Detailed Explanation:
Run-around Coil: Ideal for separated airstreams, using fluid loops to transfer heat over long distances without cross-contamination, suitable for sterile processing (ASHRAE Handbook-HVAC Systems).
NEW QUESTION # 48
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