The ____________________ is a device that creates a magnetic field when energized and causes some action to an electric component such as a relay or valve.
Fill in the blank(s) with the appropriate word(s).
solenoid
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Which refrigerant/s have an ODP of zero?
A. CFC B. HCFC C. HFC D. HC E. both c and d
Fire dampers are typically required
A) in the chimney of all residential fireplaces B) in all residential buildings C) in all buildings that have ductwork D) in all commercial buildings with ductwork passing through firewalls
Numbered symbols used on the floor plan key specific items to charts known as schedules. Schedules are a grouping of related items with corresponding distinguishing features, with a heading and minimum of three columns of related information.
Answer the following statement true (T) or false (F)
One ton of refrigeration capacity is equal to:
A. 1,200 BTUs per hour B. 12,000 BTUs per hour C. 120,000 BTUs per hour D. 1,200,000 BTUs per hour