Recreational Vehicle (RV) Technician Practice Test

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Prepare for the RV Technician Test with our quiz. Utilize flashcards and multiple-choice questions, complete with hints and explanations. Achieve success in your exam!

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At what voltage must a 30W soldering iron operate if it uses 0.35A?

85.7 volts
100 volts
90 volts
75 volts

The correct answer is: 85.7 volts

To determine the operating voltage of a 30W soldering iron that uses 0.35A, you can use the power formula, which relates power (P), voltage (V), and current (I): \[ P = V \times I \] Rearranging the formula to find voltage gives: \[ V = \frac{P}{I} \] Substituting the given values into the formula allows for calculation of voltage: \[ V = \frac{30W}{0.35A} \] Carrying out the division: \[ V \approx 85.71V \] Rounding this value gives approximately 85.7 volts. Thus, the voltage at which the soldering iron operates is accurately calculated as 85.7 volts. This calculation ensures that the soldering iron efficiently converts electrical power into thermal energy for soldering applications.