According to Article 110 of the NEC, unused openings on equipment must be __________. The sealed opening must provide the same protection as the __________. A __________is commonly used toclose unused openings in electrical boxes
What will be an ideal response?
closed, wall of the original equipment, knockout plug
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Milk has been described as nature’s most perfect food
Indicate whether the statement is true or false.
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The only place a bleed valve is needed is on top of the boiler.
Answer the following statement true (T) or false (F)
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What is the proper service clearance that should be allowed when installing a furnace?
What will be an ideal response?
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The inputs on a 7474 D flip-flop are S, R, D and clock. Which of these are asynchronous?
A) only D B) only S C) S and R D) all of the above
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