An open-loop system is practical only if
A) the secondary refrigerant loop temperature can be closely monitored.
B) a local stream or pond can be used as the water supply
C) local codes allow discharge of non-toxic anti-freeze solutions into the water supply
D) there is an adequate supply of water and it is of good quality.
D
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The same types of organisms that cause plant diseases also cause animal diseases
Indicate whether the statement is true or false
If excessive ice forms on the evaporator of a domestic freezer, which of the following is not a possible cause?
A. defective defrost timer B. dirty or blocked condenser C. defective defrost heater D. blocked evaporator
Which type of duct system has the longest life expectancy?
A. galvanized metal B. fiberglass-wrapped, spiral duct (flexible duct) C. fiberglass, fiberboard sheeting D. round sheet metal
If the current wave is centered about the zero axis, then it is called a(n) ____________________ current.
Fill in the blank(s) with the appropriate word(s).