?When chemical, electrical, or light energy excites electrons, the radiation of light is called ____.  

A. ?phosphorescence
B. ?luminescence 
C. ?iridescence
D. ?fluorescence


Answer: B

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A) 10-15°F B) 15-25°F C) 15-20°F D) 25-30°F

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Determine the weight of a recovery cylinder when safely filled with the following specifications: tare weight of 20 pounds water capacity of 30 pounds refrigerant specific gravity of 1.1

What will be an ideal response?

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