The maximum allowable deflection force on a belt is __________ than the minimum deflection force.

• A. 50% greater
• B. 50% less
• C. equal
• D. 100% greater

Answer: (A)

In belt maintenance, tension is kept within a safe window defined by a minimum and a maximum deflection force. The belt must be tight enough to prevent slipping but not so tight that it overstresses bearings and components. The maximum allowable deflection force is set up to be 50% greater than the minimum deflection force, creating a practical tolerance range. For example, if the minimum deflection force is 10 units, the maximum should be about 15 units. This 1.5x range gives a balance between avoiding slip and avoiding over-tension. The other relationships—being equal or having a 100% increase or a 50% decrease—would either remove the safety margin or misstate the allowable tension window.