The most common fan used for moving air through ductwork in residential air conditioning is:
A) Forward-curved centrifugal. B) Vane axial.
C) Backward-curved centrifugal. D) Propeller.
[Ques. 2] What is the normal storage temperature for food items like milk, cheese, fresh fruits, and vegetables?
A) From 0F to 32F B) from 40F to 50F C) from 32F to 40F D) From 25F to 35F
[Ques. 3] Which of the following humidifiers are ideal to use with heat pumps, electric furnaces, and high-efficiency furnaces?
A) Steam B) Evaporating C) Atomizing D) Bypass
[Ques. 4] What does a certification done by the Canadian Standards Association (CSA) signify?
A) The equipment meets ANSI, UL, CSA America, or NSF standards.
B) The furnace meets only Canadian standards.
C) The appliance fails to meet U.S. standards.
D) The equipment meets CSA and CSA America standards.
[Ques. 5] What are the broad areas that commercial refrigeration equipment is grouped in based on the evaporator coil temperature?
A) Perishable frozen and perishable nonfrozen
B) High, medium, low, and cryogenic temperatures
C) Frosting, nonfrosting, and defrosting
D) Refrigerator and freezers
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