Rotary compressors are used primarily in ____.
A. large industrial refrigeration and air conditioning systems
B. residential air conditioning
C. small commercial refrigeration units
D. domestic refrigerators
Answer: D
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When should a boiler be purged?
A. After light-off B. After a misfire C. After an increase of burner flame D. After shutdown
Un dispositivo de aislamiento de sitio al que no se pueda acceder fácilmente en una edificación agrícola debe poder ser operado en forma remota por medio de un mango de accionamiento de fácil acceso que se encuentre a no más de _____ sobre el nivel en su posición más alta.
a. 3'-6" b. 4' c. 6'-7" d. 7'
What is the area of a sector of a circle if the radius is 5.20 inches and the central angle is 90.00º? Round the answer to 2 decimal places.
Fill in the blank(s) with the appropriate word(s).
In a building, when exhaust air exceeds ventilation air, a negative pressure is created and the difference is made up through:
A) Duct leakage. B) Air leaving the building. C) Air infiltration. D) Positive pressure.