Which of the following machine is invariably provided with forced ventilation?
A. Fractional horse power slow speed motor.
B. Fractional horse power high speed motor.
C. Hermetically sealed motor of refrigerator.
D. 50 MW generator in a power plant.
Answer: C
Share your understanding of this question with the correct explanation.
he machine that is invariably provided with forced ventilation is the hermetically sealed motor of a refrigerator.
Hermetically sealed motors are completely enclosed and sealed to prevent any ingress of external air or contaminants. Since these motors operate in a closed environment, they tend to generate heat during operation. To ensure proper cooling and prevent overheating, forced ventilation is employed. This involves the use of fans or blowers to circulate air within the motor enclosure, dissipating the heat generated and maintaining optimal operating temperatures.
Therefore, option C, the hermetically sealed motor of a refrigerator, is the correct answer.