Why is a visual check of the heating strips on an electric furnace difficult to accomplish?
A) It is difficult to spot a break in a strip heater because of the small size wire used.
B) The heaters cannot be seen without removing them from the furnace.
C) It is not safe to look at an operating strip heater without wearing protective radiant reflecting headgear made specifically for safe viewing.
D) Electric strip heaters are complex devices.
Question 2
A heat pump condenser contains this unique control device, which switches the flow of refrigerant depending on heating or cooling mode.
A) Flow switch B) Reversing valve
C) Liquid line solenoid valve D) Bypass solenoid
Responses to Categories of Visual Stimuli
Regions of the Human Visual Cortex and Their Functions
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