Nominal sizes for the three basic types of pipes are determined by the ____________________ diameter except when the diameter exceeds 12 inches.
Fill in the blank(s) with the appropriate word(s).
inside
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When installing single conductor cables in tray systems with conductors size 4/0 and larger, they must be _____.
a. installed in multiple layers b. installed in a single layer c. spaced one cable diameter apart d. derated according to the number of conductors in the tray
Si la fuente de voltaje de un circuito suministra 240V y la resistencia mide 5 ohmios, la corriente en el circuito es de _____ amperios.
a. 20 b. 25 c. 48 d. 235
Interior wall elevations include kitchen cabinet elevations and built-in _________.
Fill in the blank(s) with the appropriate word(s).
Which of the following statements is TRUE about the economizer?
A) The economizer provides more cooled liquid refrigerant to the cooler than do systems without an economizer. B) The economizer acts as a control valve and separates the liquid cooled and warmed refrigerant. C) The economizer cools the liquid refrigerant but does not affect the volume of available liquid refrigerant. D) The economizer is directly connected to the compressor, so liquid refrigerant that flashes is returned directly to the compressor.