Which of the following is true?
A) Current must flow into the current sourcing output of the PLC from the field device.
B) Current flow from the field device must flow into the current sinking PLC output to ground.
C) A and B
D) Neither A and B
B
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Drywall fasteners should be installed ______ to make finishing easier.
a.below the surface b.flush c.slightly raised d.with a nail set
Which of the following is included in structural drawings for buildings involving posts, beams, girders, and arches?
A. A plan view showing overall dimension and spacings B. Sections showing width details and how the structural members fit together C. Welding details showing how the structural members are to be connected during erection D. Connection details drawn in smaller scale so that all connection details are fully documented
The leak detection method that is widely accepted in the field for performing a leak-check on a newly installed, assembled or repaired system is the __________.
A. electronic leak detector test B. halide leak detector test C. vacuum test D. standing pressure test
When a voltage is present at an input terminal that has the same address as an examine-off contact, a ____________________ (0, 1) is present at its addressed memory bit, it is in the ____________________ (true, false) condition, and logic continuity in its rung ____________________(does, does not) exist.
Fill in the blank(s) with the appropriate word(s).