Temporary voltage reductions are called ____.
A. Spikes
B. Sags
C. Swells
D. Blackouts
Answer: B. Sags
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The guinea pig is sometimes referred to as a ____________________
Fill in the blank(s) with correct word
Distributed supermarket refrigeration modules that are located very close to the display cases they refrigerate are becoming increasingly popular.
Answer the following statement true (T) or false (F)
What air property is measured in grains?
A) Relative humidity B) Wet bulb temperatures C) The weight of air D) Grains are used to measure the amount of water in the air
The AHRI definition of standard air is:
A) 400 CFM per ton. B) air weighing 0.075 lb/ft3 at 70°F with a barometric pressure of 29.92 in Hg. C) 78% nitrogen, 21% oxygen, and 1% "other" gases. D) air at a temperature of 0°C with a relative humidity of 50%.