In which of the following applications variable speed operation is preferred ?
Correct answer: B. Ceiling fan
- A. Exhaust fan
- B. Ceiling fan
- C. Refrigerator
- D. Water pump
Explanation
A ceiling fan commonly uses variable speed so its airflow can be adjusted according to comfort. Exhaust fans, refrigerators, and water pumps are generally operated near a required fixed speed in this type of basic application question.
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