A CAT III certified DMM should be used whenever measuring high-voltage circuits or components. The CAT III rating relates to _________
A) High voltage B) High energy
C) High electrical resistance D) Both A and B
D
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A check valve arranged and trimmed for installation in a drain line that is used to control backflow is a
A. needle valve B. gate valve C. backwater valve D. diaphragm valve
What kinds of pressures are expressed in inches of water column?
A) Atmospheric pressure or vacuum B) Saturation pressures on a saturation pressure-temperature chart C) Refrigeration system high- and low-side pressures D) Air pressure in ductwork or gas line pressure
If the input module indicator and the XIC and the XIO ladder instructions are in agreement, then a voltage measurement indicates ________
A) The problem is in the field wiring or field device if the input voltage does not agree with the field device condition B) The problem is in the input in the module if the input voltage agrees with the field device condition C) Either A or B D) Neither A or B
When frequency decreases, capacitive reactance _____
a. increases b. decreases c. stays the same d. may increase or decrease