Question 39Refrigeration & AC - Assistant Engineer

The correct answer is B) motor shaft and compressor main bearings. When a V-belt is tensioned too tightly, it can put excessive stress and wear on the motor shaft and the main bearings of the compressor. This is because the excessive tension in the belt transmits high loads through the shaft and into the bearings, causing them to wear out prematurely. The other answer choices are incorrect because: A) the compressor drive pulley is not a component that would be excessively worn by a tight V-belt; C) the shaft of the prime mover (typically an electric motor) can also be damaged by the tight belt tension, but is not the main component that experiences the excessive wear; and D) the prime mover drive pulley, similar to the compressor pulley, is not the primary component affected by the tight belt tension.