When current is applied to the coil of an NC relay,
A) it opens. B) it closes.
C) its contacts touch. D) it opens and its contacts touch.
A
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Which of the following is the fall or slope of a line in reference to the horizontal plane?
a. angle b. trench c. grade d. intercept
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The first orbital welding heads were used by the _____ and nuclear power industries to meet their need for a highly reliable and cost-effective way of producing pipe welds.? ?
Fill in the blank(s) with the appropriate word(s).
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Sulfur can be used to increase soil acidity and to reduce alkalinity
Indicate whether the statement is true or false
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An instrument that provides a direct reading of relative humidity is the _____
a. sling psychrometer b. manometer c. velometer d. hygrometer
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