In a parallel RLC circuit,at resonance the capacitive reactance (XC) and the inductive reactance (XL):
A) equal and oppose current flow. B) are moderate.
C) add to each to cancel current flow. D) are minimum.
A
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The first check to make whenever working on a water-cooled system is:
A) Compressor amp draw. B) Outdoor ambient wet bulb temperature. C) Condenser water flow. D) System operating pressures.
When adjoining walls and columns and piers, the columns should be aligned straight with one another with the wall between them.
Answer the following statement true (T) or false (F)
NEMA-rated motors are designed to operate at plus or minus ____ percent of their rated voltage.
A. 5 B. 10 C. 15 D. 20
Water from a river is used to cool the steam in the condenser of a power plant. If a temperature rise of 20°C is desired in the water, the mass flux needed to cool 4 kg/s of steam at 20 kPa from x = 1 to x = 0 is nearest:
A) 975 kg/s B) 82 kg/s C) 99 kg/s D) 113 kg/s