Excessively tight drive belts installed between a motor and a refrigeration compressor pulley may cause what condition?

Correct Answer: Option B — premature wear of both the pulley end motor shaft bearing and the pulley end compressor crankshaft main bearing due to overloading

Over-tightening drive belts subjects both the motor shaft and compressor crankshaft to excessive radial preloads. This continuous mechanical overload breaks down the lubricating oil film, resulting in rapid, premature bearing wear at both pulley-end locations.