Difficulty: Easy
Correct Answer: False
Explanation:
Introduction / Context:
Correct AC power units are critical for specifying transformers, UPS systems, and inverters. Apparent power, real power, and reactive power use different units and convey different physical meanings.
Given Data / Assumptions:
Concept / Approach:
Real power P is measured in watts (W). Reactive power Q is measured in volt-ampere reactive (var). Apparent power S is measured in volt-amperes (VA). Apparent power reflects the product of RMS voltage and RMS current irrespective of phase angle.
Step-by-Step Solution:
Verification / Alternative check:
Equipment nameplates often list kVA for transformers (apparent power rating) and kW for loads (real power). This practical distinction validates the unit separation.
Why Other Options Are Wrong:
Common Pitfalls:
Using kW when sizing generators for loads with poor power factor; the correct initial sizing metric is kVA, then ensure adequate kW capacity given expected PF.
Final Answer:
False
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