[amp_mcq option1=”system power factor is changed” option2=”some loads are switched off” option3=”system voltage is reduced” option4=”system frequency is reduced Efficiency is the secondary consideration in” correct=”option2″]
The correct answer is: B. some loads are switched off.
Load shedding is the process of intentionally reducing the load on an electrical system to prevent a blackout. This is done by switching off some of the loads, usually the ones that are least essential.
The other options are incorrect because:
- A. system power factor is changed. The power factor is the ratio of real power to apparent power. It is not changed during load shedding.
- C. system voltage is reduced. The system voltage may be reduced during load shedding, but this is not the main purpose of load shedding.
- D. system frequency is reduced. The system frequency is not reduced during load shedding.
Efficiency is the secondary consideration in load shedding. The main consideration is to prevent a blackout. Efficiency can be improved by using more efficient loads, but this is not always possible.