Coil corrosion that results from two dissimilar metals coming in contact with an electrolyte is called:
A) General corrosion. B) Galvanic. C) Hygroscopic. D) Electrolytic.
B
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When three solid-state relays are connected in series, the supply voltage must be _____.
a. half of the minimum operating voltage for a single relay b. a third of the minimum operating voltage for a single relay c. triple the minimum operating voltage for a single relay d. four times the minimum operating voltage for a single relay
The GFCI operates on the principle that an equal amount of current is flowing through the two wires.
Answer the following statement true (T) or false (F)
What type of vent is used with 80 percent Category I furnaces?
A) 90 percent efficiency furnaces do not require a vent. B) PVC C) Type B double-wall gas vent D) Single-wall stainless steel
Earthbag construction for human shelters was outlawed in the united states in the 1970s.
Answer the following statement true (T) or false (F)