Question

The advantage of three-phase induction motor is:

• A. High price
• B. Easy to maintain
• C. Low efficiency
• D. Bad power factor

Answer 1

The Correct Option is B

Three-phase induction motors are prevalent in industrial applications owing to their durability, straightforward design, and dependability. A significant benefit is their minimal maintenance requirements. Unlike DC motors, they lack brushes and commutators, thereby reducing wear and tear and the necessity for frequent upkeep.
(A) High price: Inaccurate. While the initial investment might be slightly greater, their long-term cost-effectiveness is high due to low maintenance.
(B) Easy to maintain: Accurate. Their simplified construction and absence of intricate components decrease maintenance demands.
(C) Low efficiency: Inaccurate. These motors typically exhibit high efficiency.
(D) Bad power factor: Inaccurate. In reality, they usually possess a satisfactory power factor.