What is the purpose of a duct stretcher?
A) To pull rectangular duct together when using drive cleats
B) To increase the length of a sheet metal duct when it is within ΒΌ in
C) There is no such thing as a duct stretcher.
D) To pull flexible duct straight
A
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The truth table that implements the logic equation Y = A (B + C) has ______ rows
Fill in the blank(s) with the appropriate word(s).
Defrost using internal heat is accomplished using ____.
A. a sail switch B. electric heating elements C. hot gas from the compressor D. mullion heaters
Examples of control devices include:
A) Compressors, thermostats, pressure switches, and heaters. B) Compressors, signal lights, and defrost timers. C) Thermostats, pressure switches, and humidistats. D) Motors, resistance heaters, and solenoid valves.
Cylinder
Carry the answer to two decimal places.
A 8" pipe 340' long can hold how many gallons of water?
Fill in the blank(s) with the appropriate word(s).