Question 35Refrigeration & AC - Assistant Engineer

The correct answer is C) premature wear of both the pulley end motor shaft bearing and the pulley end compressor crankshaft main bearing due to overloading. Explanation: Excessively tight drive belts between a motor and a refrigeration compressor pulley can cause the components to become overloaded. This overloading results in premature wear of the pulley end motor shaft bearing as well as the pulley end compressor crankshaft main bearing. The tight belts create excessive forces and friction that accelerate the wearing down of these critical bearings. The other options are incorrect because they do not fully capture the impact of the excessively tight belts. Option A describes only the motor shaft bearing being affected, while option B suggests belt slippage as the issue, and option D indicates only the compressor bearing would experience premature wear.