Why would a preheat coil be used on the energy-recovery wheel?
A) To dry the intake air B) To prevent moisture transfer to the supply air
C) To prevent frost from forming on the wheel D) To warm the exhaust air
C
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Which statement is NOT correct?
You are attempting to heat the inside of a shed by placing rocks into a hot spring(a geothermally heated natural spring), then moving the rocks inside the shed and letting them warm the room. Once the rocks no longer feel warm, the process is repeated.
How did the factor used in the determination of conductor size change with the 2011 changes to the Code?
What will be an ideal response?
Two basic categories of chillers are the ____.
A. compression cycle and absorption B. purge and absorption C. absorption and lithium bromide D. purge and lithium bromide
To check the quality of groundwater, many construction sites _____
a. test samples weekly b. dig monitoring wells c. set up a testing laboratory d. request EPA inspections