Production of CFC refrigerants became illegal on _________________________.
Fill in the blank(s) with the appropriate word(s).
January 1, 1996
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Which of the following is unlikely to directly affect the ability of a heating system to vent combustion
products? a. The diameter of the vent and vent connector b. The combined length of the vent and vent connector c. The number of elbows in the vent system d. The type of ignition system used
Fan cycling, fan speed control, damper control, and condenser flooding are different types of:
A) Protection against excessively high condenser pressures. B) Condenser Low ambient controls. C) System capacity control. D) Energy efficiency improvements.
Which type of outputs do RAM circuits have?
A) random B) high power C) TTL D) three-state
Solar energy collectors are usually divided into three categories: _________, _________, and ________.
Fill in the blank(s) with the appropriate word(s).