Exam Prep Questions
| Question 1 |
What is the real power delivered in watts by a UPS that is connected to a computer rated at 185 VA and a power factor of .7?
|
| A1: | Answer C is correct. The apparent power of the computer receiving power from the UPS is the product of the volts × amperes. The real power is found by multiplying the apparent power by .7 (the power factor) to arrive at the correct value of 129.5 watts. Answer A is incorrect because 185 is the apparent power. True power is calculated by multiplying 185 by the power factor (.7). Answers B and D are incorrect values that are not the result of multiplying the apparent power by .7. |
| Question 2 | What is the per hour cost of operation for a lighting fixture that is rated ... |
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