Inside the switch of a typical ____ controller is a series of contacts mounted on a movable cylinder.
a. series
b. drum
c. stationary
d. circular
b. drum
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The General Requirements section specifies the products, equipment, and systems that are intended to be installed during the project.
Answer the following statement true (T) or false (F)
If the floor of a steel-frame building has primary, secondary, and tertiary components, the secondary components consist of
A) W-shape beams. B) steel joists. C) steel joist girders. D) any one of the above. E) A or B.
The DS-2 circuit uses a(n) ________-interleaved structure when multiplexing ones and zeros
Fill in the blank(s) with correct word
Which of the following statements on PLC 5 and SLC 500 status operation is NOT true?
A) Program errors can change status data values. B) PLC instructions can change status data values. C) Status data cannot be used by instructions for logical control. D) The first pass bit status address is S:1/15.