AutoQuiz: How Is Resistance Measured?

AutoQuiz is edited by Joel Don, ISA’s social media community manager.

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 AutoQuiz20151113frequently 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.

Discount Alert: Register today to take advantage of a 40% special discount for the pilot offering of the electrical controls course. Click this link to view the special offer. Registration closes Nov. 23.

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

 

Click Here to Reveal the Answer

Here’s the answer to today’s quiz from the instructor for ISA’s December course offering, Electrical Controls for the Control Systems Technician (TI23).

Circuits should be de-energized. Place the mode switch in “OHMS”, short the meter leads together, press the “REL” button and connect the leads as shown in the diagram. Absolutely no circuit path for the measured component.

The correct answer is C.

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