Cathodic Protection Tester Practice Exam

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Prepare for the Cathodic Protection Tester Exam. Study with comprehensive flashcards and multiple-choice questions, complete with hints and explanations to ensure success. Ace your test with confidence!

Practice this question and more.

Which instrument measures current flow caused by a known voltage source?

Multimeter
Ohmmeter
Ammeter
Volt meter

The correct answer is: Ammeter

The instrument that measures current flow caused by a known voltage source is the ammeter. An ammeter is specifically designed to measure the amount of electrical current (in amperes) flowing in a circuit. When used with a known voltage source, it helps determine how much current is being driven through a circuit under those conditions. While a multimeter can measure multiple electrical properties, including current, it is not exclusively designed for measuring current like an ammeter. An ohmmeter is used to measure resistance in a circuit, and a voltmeter measures the voltage across two points in an electrical circuit. Therefore, the ability of the ammeter to directly measure the current flow in relation to a known voltage source makes it the correct choice for this question.