The NOR logic function of a relay ladder circuit is performed by __________.
A. two or more N.O. push buttons connected in series
B. two or more N.O. push buttons connected in parallel
C. two or more N.C. push buttons connected in series
D. two or more N.C. push buttons connected in parallel
Answer: C
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A soft drink bottling plant discharges a wastewater with a dissolved solids concentration of 10,000 mg/l NaCl, at a rate of 100 gal/min to a stream. The stream above the discharge has a volumetric flowrate of 1.0 MGD and a dissolved solids concentration of 25 mg/l. Below the discharge point is a prime fishing spot, and the fish are intolerant of salt concentrations above 200 ppm. What will be an ideal response?
Proper ventilation is important when welding because _____.
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The current in an inductive circuit _____
a. is faster than the voltage b. is the same as the voltage c. lags the voltage d. counteracts the voltage
An oil marked as SAE 50 is _________ than an oil marked SAE 30
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