What is the difference in equivalent length of an 8-in connector between a 45-degree ell and a 90-degree ell?
A) 9 ft B) 6 ft C) 7 ft D) 8 ft
C
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Which method enables ultraviolet (UV) lamps to be able to kill the maximum number of microbes in a duct system?
a. Install UV lamps in the airstream ahead of an EAC. b. Constantly bathe the evaporator coil with UV light. c. Cycle the UV lamps on and off with the furnace blower. d. Install UV lamps in the return air duct airstream.
Bonsai plants can be fertilized with liquid fertilizers _____
A) once a year B) twice a year C) three times a year D) four times a year
The Hillman wreath frame system is made by _____
A) machine B) hand C) using fillers D) using branches that are 8 to 12 inches in length
The word "zoo" comes from the ancient Greek word, zoion, which means _____
a. study of life b. caged animal c. treasured wildlife d. living being