[Oct-2025] 100% Actual HFDP dumps Q&As with Explanations Verified & Correct Answers
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NEW QUESTION # 58
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. 70 CFM (33.0 L/s)
- C. 370 CFM (174.6 L/s)
- D. 150 CFM (70.8 L/s)
Answer: C
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 # 59
What determines building envelope requirements in ASHRAE Standard 90.1?
- A. Building orientation
- B. Climate zone
- C. Building area
- D. Project construction budget
Answer: B
NEW QUESTION # 60
In accordance with The Joint Commission's Environment of Care™ requirements, as part of the emergency management plan, healthcare organizations must conduct which of the following to identify potential emergencies?
- A. Hazard Vulnerability Analysis
- B. Incident Command Probability Index
- C. Infection Control Risk Assessment
- D. Federal Emergency Incident Matrix
Answer: A
NEW QUESTION # 61
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 a DDC control system upgrade
- D. Require an upgrade to premium efficiency motors
Answer: A
NEW QUESTION # 62
The following information refers to the diagram above.
The following information refers to the diagram above:
* The room is an Airborne Infection Isolation Room with a series anteroom.
* The room volume is 960 cubic ft. (27 cubic m).
* The room cooling load is 4,000 Btu/hr sensible only. (Ignore latent loads.) (1172 W)
* The supply air temperature is 55° F (12.8° C), and the room temperature set point is 75° F (23.9° C).
* The toilet exhaust is 100 cfm (47.2 L/s).
* The total room envelope leakage area is 35 sq. in. (22.575 sq. cm), (A_L).
* The anteroom supply air volume is 75 cfm (35 L/s).
* The design pressure difference complies with FGI Guidelines (D_p) (in. water/kPa).
* The room air flow difference (Q_d) is defined by the following:
Q_d = (7p)^0.65 x A_L / 0.019564
(SI) Q_d = (7p)^0.65 x A_L / 10,000
Based on the diagram and the information above, what is the MINIMUM design room air exhaust volume?
- A. 100 cfm (48 L/s)
- B. 75 cfm (35 L/s)
- C. 250 cfm (117 L/s)
- D. 300 cfm (142 L/s)
Answer: C
Explanation:
To determine theminimum design room air exhaust volume, we analyze the airflow balance in theAirborne Infection Isolation Room (AIIR).
Step 1: Understanding Airflow Requirements
* Total Airflow into the Room:
* Anteroom Supply Air=75 cfm
* Other possible supply sourcesare not mentioned, so we assume no additional supply.
* Exhaust Requirements:
* Toilet Exhaust=100 cfm
* Additional exhaust must create a negative pressure to meet isolation standards.
Step 2: Required Negative Pressure (Qd Calculation)
The equation forQ_d (airflow difference)is:
Qd=(7p)0.65×AL0.019564Q_d = \frac{(7p)^{0.65} \times A_L}{0.019564}Qd=0.019564(7p)0.65×AL
* GivenA_L = 35 sq. in.
* The design pressure (p) is not explicitly mentioned, but perFGI Guidelines, a typical value is around
0.01 in. water.
Using approximate values from standard calculations:
Qd#50#75 cfmQ_d \approx 50 - 75 \text{ cfm}Qd#50#75 cfm
Step 3: Total Exhaust Calculation
To maintain negative pressure:
Exhaust Air=Supply Air+Qd\text{Exhaust Air} = \text{Supply Air} + Q_dExhaust Air=Supply Air+Qd Exhaust Air=75+(50 to 75)\text{Exhaust Air} = 75 + (50 \text{ to } 75)Exhaust Air=75+(50 to 75)
#125#150 cfm (minimum)\approx 125 - 150 \text{ cfm (minimum)}#125#150 cfm (minimum) Step 4: Choosing the Correct Answer
* The closestminimum design exhaust volumeoption isC. 250 cfm, ensuring sufficient negative pressure.
NEW QUESTION # 63
Airborne Infection Isolation Rooms are intended to prevent the spread of diseases such as:
- A. Measles
- B. MRSA
- C. Hepatitis
- D. AIDS
Answer: A
NEW QUESTION # 64
Which of the following must be maintained in an unoccupied Operating Room with a Variable Air Volume system?
- A. Heating load requirement
- B. Cooling load requirement
- C. Appropriate humidity ratio
- D. Appropriate pressure relationship
Answer: D
NEW QUESTION # 65
Secondary (redundant) air systems for maintenance purposes are MOST often used in which of the following locations?
- A. Procedure Room
- B. Intensive Care Units
- C. Bone Marrow Transplant Units
- D. Radiation Treatment Rooms
Answer: C
NEW QUESTION # 66
Air in an Airborne Infection Isolation Room shall be:
- A. Transferred to an adjacent room
- B. Returned to the main air handling system
- C. Directed outside
- D. Re-circulated within the room
Answer: C
Explanation:
Comprehensive and Detailed Explanation:
AIIR Exhaust: ASHRAE 170, Section 7.2.1, requires air from AIIRs to be exhausted directly outside (or HEPA-filtered if recirculated) to prevent pathogen spread. Recirculation (A), transfer (B), or return to AHU (D) are prohibited without filtration.
NEW QUESTION # 67
HVAC design for cardiac catheterization suites must take into account that the facilities:
- A. Are associated with relatively noninvasive procedures
- B. Are required to have treatment rooms with negative pressure
- C. Contain significant electrical equipment loads
- D. Require infrequent mechanical upgrades
Answer: C
NEW QUESTION # 68
In accordance with ASHRAE Standard 170, general hospital Operating Rooms must have a minimum of two return grilles, one of which must be located:
- A. Adjacent to the anesthetizing location
- B. As far away from the other as practical
- C. At breathing height
- D. High, and the other low
Answer: D
Explanation:
Comprehensive and Detailed Explanation:
OR Ventilation: ASHRAE Standard 170, Section 7.4.1, mandates at least two return/exhaust grilles in ORs, with one high and one low. The low grille (near the floor) removes heavier contaminants, while the high grille aids in overall air circulation, supporting laminar flow from ceiling diffusers.
Option Analysis:
A/B: Breathing height or anesthetizing location are not specified in ASHRAE 170.
C: Distance is practical but not the primary requirement.
D: Correct-high and low placement is explicitly required.
NEW QUESTION # 69
Under condition 1 of the NFPA 70, what is the MINIMUM clearance required in front of exposed live parts with nominal voltage to ground of 600V?
- A. 42 in. (107 cm)
- B. 30 in. (76 cm)
- C. 24 in. (61 cm)
- D. 31 in.(91 cm)
Answer: D
NEW QUESTION # 70
Which of the following is associated with "hot rooms"?
- A. Newborn ICU
- B. Central Plant
- C. Nuclear Medicine
- D. Physical Therapy
Answer: C
Explanation:
Comprehensive and Detailed Explanation:
Hot Rooms: In healthcare, "hot rooms" refer to areas in Nuclear Medicine where radioactive materials (e.g., for imaging) are handled, requiring special HVAC considerations (ASHRAE Handbook-HVAC Applications).
NEW QUESTION # 71
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. The building trade-off option
- B. Simplified approach
- C. Energy modeling
- D. The prescriptive method
Answer: D
NEW QUESTION # 72
Which of the following determines the number and location of the means of egress in hospitals?
- A. Joint Commission
- B. NFPA 101
- C. ASHRAE Standard 170
- D. NFPA 90A
Answer: B
NEW QUESTION # 73
Which of the following is the BEST location of a return grille in a Protective Environment Room?
- A. In the anteroom on the ceiling
- B. In the toilet room on the ceiling
- C. Low on the sidewall by the room entrance
- D. In the floor under the window
Answer: C
Explanation:
Comprehensive and Detailed Explanation:
PE Room Design: ASHRAE Standard 170, Section 7.2.2, requires positive pressure with supply air from ceiling diffusers (HEPA-filtered) and return/exhaust low on the sidewall to maintain airflow from clean to less clean areas (e.g., towards the entrance).
Option Analysis:
A: Toilet exhaust is separate, not the primary return.
B: Floor placement is less common and less effective.
C: Anteroom return doesn't control room airflow.
D: Correct-low sidewall near entrance optimizes airflow.
NEW QUESTION # 74
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. Size of the area or room
- D. Amount of time that the airflow can be reduced
Answer: D
NEW QUESTION # 75
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