Question 277Electricity & Electronics - 1st Asst/Chief

The correct answer is D) to determine power factor of either generator. The "PFM Sel. Sw." or Power Factor/Megawatt Selector Switch is used to determine the power factor of the generators connected to the switchboard. This is an important parameter to monitor, as the power factor affects the efficiency and performance of the electrical system. The other answer choices are incorrect because they do not accurately describe the function of this particular switch. Options A and C relate to frequency, while option B is about reactive volt-amperes, which are different electrical parameters from power factor.