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Last Updated: May 31, 2026
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1. 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 a Patient Room provide at least 12 ACH for maximum dilution of airborne contaminants
D) The supply diffusers in an Operating Room direct a unilateral downwards flow of air towards the patient
2. 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) High, and the other low
B) As far away from the other as practical
C) Adjacent to the anesthetizing location
D) At breathing height
3. In accordance with ASHRAE Standard 170, which of the following must be maintained when air change rates are reduced during unoccupied periods?
A) Required temperature range
B) Required humidity range
C) Required minimum outside air
D) Required direction of air movement
4. 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) 250 cfm (117 L/s)
C) 75 cfm (35 L/s)
D) 300 cfm (142 L/s)
5. In accordance with the ASHRAE HVAC Design Manual for Hospitals and Clinics, to avoid carryover of droplets from a standard cooling coil into the air handling unit casing, the recommended MAXIMUM air velocity through the cooling coil should be no more than:
A) 750 fpm (3.81 m/s)
B) 550 fpm (2.79 m/s)
C) 650 fpm (3.30 m/s)
D) 450 fpm (2.29 m/s)
Solutions:
| Question # 1 Answer: D | Question # 2 Answer: A | Question # 3 Answer: D | Question # 4 Answer: B | Question # 5 Answer: B |
Allen
Benedict
Chapman
Earl
Gregary
Jerry
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