Question

An air-conditioning compressor pulley or bearing may need service when which of the following is detected from the bearing as the engine is running?

a) Loss of pressure
b) Leakage
c) Noise
d) Vibration

Answer 1

An air-conditioning compressor pulley or bearing may need service when noise is detected, as it often indicates bearing issues.

Step-by-step explanation:

An air-conditioning compressor pulley or bearing may need service when noise is detected from the bearing as the engine is running. This is because noise is typically a sign of wear, misalignment, or degradation in the bearing, which facilitates the movement of the pulley.

Other symptoms like leakage and vibration can also be indicators of issues, but noise is most directly related to bearing problems. Loss of pressure would generally relate to the air-conditioning system itself rather than the bearing of the compressor pulley.