An OR function is performed by the PLC when two or more inputs are connected in __________.
A. series
B. parallel
Answer: B
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In order for the control circuit to perform its desired function, the pressure switch must contain six different contacts, three normally closed and three normally open.
Answer the following statement true (T) or false (F)
What are the good qualities achieved by using transformers with high K-ratings? Select all that apply.
A) Quieter operation. B) Less magnetic flux. C) Reduced I2R distribution losses. D) Reduced heat generation.
The result of the Second Anglo-Powhatan War in 1644 can best be described as
A. halting white settlement on the frontier. B. returning the Chesapeake Indians to their ancestral lands. C. making peaceful coexistence possible between the European and native peoples. D. ending any chance of assimilating the native peoples into Virginia society. E. bringing together areas of white and Indian settlement.
When changing a low-voltage transformer, the service technician should:
A) Use a replacement transformer with a higher VA rating to make it last longer. B) Check all low-voltage controls for shorts and grounds. C) Use a replacement transformer with a higher-voltage primary winding to make it last longer. D) Temporarily short across the secondary side of the transformer to test its output.