【Daily Question】Utilities - Mechanical & Electrical - 20200213
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When the tension of the belt is constant, the distance between the axes of the two pulleys is called the center distance. The central angle corresponding to the contact arc between the belt and the pulley is called ( ). A. Angle of closure B. Angle between C. Arc angle D. Rotation angle Answer: A
The wrap angle refers to the central angle corresponding to the arc of contact between the belt and the pulley. So the answer is A