What is the area of a circle whose radius is 3'?
What will be an ideal response?
28.27 ft
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What drain-cleaning device would be a good choice for a contractor who wants a low-cost device for only occasional use?
What will be an ideal response?
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What is the difference between a relay and a contactor?
What will be an ideal response?
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Preheating of the weldment helps to:
A) Reduce hydrogen absorption B) Reduce martensite formation C) Reduce residual stresses D) All of the above
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What are the advantages of water for use in a thermal storage system?
A) its temperature remains stable when charging and discharging B) water can store more heat per pound than ice or phase change materials C) universal availability and low cost D) water storage takes up less space than ice or phase change materials
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