A word address in PLC memory containing a decimal value from a real-world input device such as a temperature sensor, or pressure transmitter is a(n) ____________________.
What will be an ideal response?
analog input
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Plasma cutters have the unique ability to cut metals without making them very hot.
Answer the following statement true (T) or false (F)
Which of the following statements about soil erosion is not true?
A) Less than 20 percent of the total soil erosion in the United States comes from croplands. B) Soil erosion losses of potassium exceed those of nitrogen and phosphorus. C) Downstream off-site costs of erosion are often higher than those in upstream fields from which the soil came. D) The rate of soil erosion loss in the United States declined from 1980 to 1995. E) Soil erosion losses per hectare of cropped land are higher in Asia and Africa than the United States.
Voltage drop is a better measurement of resistance than testing static resistance because _______
A) The resistance specification for the component is not required for diagnosis B) Current flow creates heat which adds to circuit resistance C) Both A and B D) Neither A nor B
What feature of early modern cities made them especially dangerous during enemy attacks?
a. defensive walls b. wooden structures c. poor sanitation d. overcrowding