When troubleshooting with module indicators, in which of the following locations could a fault occur?
A) Input sensor B) Output actuator C) PLC processor D) All of the above
D
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Bending stresses may develop in an arch if the supports at the ends of the arches shift because of:
A. structural stiffening. B. drag or base isolation. C. resonance or negative pressure. D. settling soil or thermal expansion.
What supplies the high voltage necessary for starting a fluorescent lamp?
What will be an ideal response?
State the primary difference between a detector and a meter
A) Detectors are calibrated in standard units and meters are calibrated in metric units. B) A meter simply detects the presence of a contaminant. A detector measures the amount of the contaminant. C) They are two words for the same instruments. D) A detector simply detects the presence of a contaminant. A meter measures the amount of the contaminant.
An AX valve works best when the evaporator load is constant.
Answer the following statement true (T) or false (F)