Recreational Vehicle (RV) Technician Practice Test

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Get ready for the RV Technician Exam. Study with flashcards and multiple-choice questions. Each query comes with hints and explanations. Prepare for success!

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What should be avoided when measuring resistance with a voltmeter?

Connecting the meter in series
Connecting the meter in parallel
Measuring in a powered circuit
Using a faulty multimeter

The correct answer is: Measuring in a powered circuit

When measuring resistance with a voltmeter, it is crucial to avoid measuring in a powered circuit. This is because a voltmeter is designed to measure voltage across components and is not intended to measure resistance while current is flowing through the circuit. If you attempt to measure resistance in a powered circuit, the current from the power source can produce erroneous readings due to the meter's internal resistance and can potentially damage the voltmeter itself. In contrast, measuring resistance should always be done in an unpowered circuit. When resistance is measured correctly, the meter applies a small voltage and measures the resulting current to calculate the resistance using Ohm's law. This process relies on the absence of any external voltages, otherwise, the measurement will not be accurate and could lead to unsafe conditions or equipment damage.