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. $65,000
B. $117,500
C. $55,000
D. $127,500
正解:A
解説: (Pass4Test メンバーにのみ表示されます)
質問 2:
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. 93.75 tons (329.6 kW)
B. 1125 BTUH (329.6 W)
C. 22.5 tons (79.1 kW)
D. 270 BTUH (79.1 W)
正解:A
解説: (Pass4Test メンバーにのみ表示されます)
質問 3:
Energy recovery systems serving Airborne Infectious Isolation Rooms must meet which of the following criteria?
A. Total effectiveness greater than 50%
B. Leakage potential shall be designed to have no more than 5% of the total supply airstream consisting of exhaust air
C. Supply airstream and exhaust airstream components are separated by an air gap open to the atmosphere
D. Wheel leakage of less than 0.5%, as determined by an SF6 test performed on the fully operational system in the field
正解:B
質問 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. 300 cfm (142 L/s)
B. 250 cfm (117 L/s)
C. 75 cfm (35 L/s)
D. 100 cfm (48 L/s)
正解:B
解説: (Pass4Test メンバーにのみ表示されます)
質問 5:
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. Type of procedure being performed
B. Size of the area or room
C. Amount of time that the airflow can be reduced
D. Number of procedures performed
正解:C
質問 6:
The Infection Control Risk Assessment Process addresses the:
A. Water systems to limit Legionella
B. Number of linen rooms needed
C. Cost of construction
D. Required knowledge level of nursing staff
正解:A
Hamada -
平日は忙しくて、勉強する時間が少ないです。でも、HFDP問題集のおかげで、HFDP試験に合格しました。誠にありがとうございました。