Electrical Inspection, Testing and Certification Practice Exam

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All continuity tests utilize which type of measuring device?

Multimeter
High voltage tester
Low resistance ohm meter
Insulation tester

The correct answer is: Low resistance ohm meter

Continuity tests are conducted to ensure that electrical paths are unbroken and that current can flow through a circuit or component as intended. The most appropriate device for conducting these tests is a low resistance ohm meter, also known as a milliohm meter. This device allows for precise measurement of very low resistance values, which is crucial when checking connections, wires, and other components for continuity. When performing a continuity test with a low resistance ohm meter, a small amount of current is passed through the circuit, and any significant resistance indicates a problem, such as a break in the circuit. While a multimeter can be used to check for continuity, its primary function is broader than that of a dedicated low resistance ohm meter, which is specifically optimized for low resistance measurements. The other devices, such as high voltage testers and insulation testers, serve very different purposes by focusing on testing insulation integrity or assessing the ability of an electrical system to withstand high voltages without breaking down. They do not provide the immediate feedback needed for continuity checks.