The post AutoQuiz: How to Measure the Resistance of a Conductor first appeared on the ISA Interchange blog site.
Today’s automation industry quiz question comes from the ISA Certified Automation Professional certification program. ISA CAP certification provides a non-biased, third-party, objective assessment and confirmation of an automation professional’s skills. The CAP exam is focused on direction, definition, design, development/application, deployment, documentation, and support of systems, software, and equipment used in control systems, manufacturing information systems, systems integration, and operational consulting. Click this link for more information about the CAP program. The following question comes from the CAP study guide, Performance Domain III, System Design, Design, specify, and procure the hardware/software used in the system.
What is the resistance of 1,000 feet of copper wire (specific resistance = 10.37) given a cross-sectional area of 10370 cmil and a wire temperature of 20°C? (Given R = r L/A)
a) 1 Ω
b) 2 Ω
c) 10 Ω
d) 100 Ω
e) none of the above
Source: ISA News