Ultraviolet light-generating equipment can be used in HVAC air distribution systems to _____.
a. reduce odors caused by cigarette smoke
b. help prevent the growth of bacteria and micro-organisms
c. protect coils and drain pans from ice buildup
d. examine the duct work for cleanliness and damage
b. help prevent the growth of bacteria and micro-organisms
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Water that seeps into the ground continues through the ground until it reaches the _____________________ point
Fill in the blank(s) with correct word
Why are draft inducer fans necessary in today's furnaces?
A) To move gas into the burner assembly B) To move the flue gasses through the ductwork C) The flue gasses cannot make their way through the new heat exchangers on their own. D) To separate the flue gas from the heat through centrifugal force
FIFO memory is true random access
Indicate whether the statement is true or false
High- and low-pressure safety switches are installed in _____
a. series in the compressor's contactor coil b. series in the compressor's common conductor c. parallel with the compressor's contactor d. series with a current-sensing loop