ASE Heating and Air Conditioning Multiple Choice Practice Test

Question 1 of 3
63% Get this Question Right
There is a growling/rumbling noise at the AC compressor when the system is off and the engine is running. The noise stops when the system is turned on.Tech Y says that a bad compressor bearing could be the cause. Tech Z says that a bad compressor clutch bearing could be the cause. Who's correct?
Tech Y
Neither Tech Y nor Z
Both Tech Y and Z
Tech Z