Today’s automation industry quiz question comes from ISA’s course, Electrical Controls for the Control Systems Technician (TI23). This course focuses on electrical controls that are frequently overlooked in a formal training program. It is geared toward any level technician who wants a thorough review of electrical process concepts to reinforce their knowledge of basic electricity and develop skills required to install and maintain electrical control devices. The next class starts Dec. 7.
Which of the statements listed is correct for the measurement of resistance?
a) resistance is measured in parallel with the circuit de-energized
b) resistance is measured in series with the circuit energized
c) resistance is measured in parallel with the circuit de-energized and the device being measured isolated
d) resistance may be measured in series or parallel as long as the circuit is energized
e) none of the above