Valves that use motors that move in tiny increments are:
A) Cross charged expansion valves. B) Pulse modulated valves.
C) Stepper motor valves. D) Electronic expansion valves.
C
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A transistor is made by joining how many layers of semiconductor material?
a. Two b. Three c. Four d. Five
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________: the level of output per unit of input.
Fill in the blank(s) with the appropriate word(s).
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Concrete normally attains its design strength in about _____.
a. 14 days b. 21 days c. 28 days d. 30 days
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Sparks from a cutting operation can travel at least _____.
a. 20 feet b. 30 feet c. 40 feet d. 50 feet
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