Unusual noise coming from a refrigeration...

Question 1 / 270705eccef9ebacbc34ba4d46177

Question 1 of 270705eccef9ebacbc34ba4d46177

Unusual noise coming from a refrigeration compressor can be caused by which of the following conditions?

Question 1 of 27070

Unusual noise coming from a refrigeration compressor can be caused by which of the following conditions?

🔍 Key Concepts

• Mechanical wear in compressors and how it affects noise and vibration • Refrigerant and oil behavior in the system (floodback, slugging, circulation) • How multiple different faults can sometimes produce similar symptoms like noise

💭 Think About

• For each option, ask yourself: would this condition reasonably create knocking, rattling, or unusual mechanical sounds inside a compressor? Why or why not? • Think about what happens if liquid refrigerant or excess oil enters the compressor cylinders instead of vapor—how would that sound mechanically? • Consider whether exam questions about troubleshooting often focus on a single cause, or whether they sometimes group several related causes under one choice.

✅ Before You Answer

• For each listed condition, visualize the mechanical interaction inside the compressor (bearings, pistons, valves) and whether it could cause noise. • Ask: does wear in moving parts (like bearings and pins) usually lead to quiet or noisy operation? • Confirm whether slugging/floodback is known to cause loud knocking or hammering sounds due to incompressible liquid entering the compressor.

Question 1 of 27070

Unusual noise coming from a refrigeration compressor can be caused by which of the following conditions?

too much oil in circulation

worn bearings and piston pins

slugging due to flooding back

all of the above

Question 1 / 270705eccef9ebacbc34ba4d46177

Question 1 of 270705eccef9ebacbc34ba4d46177

Unusual noise coming from a refrigeration compressor can be caused by which of the following conditions?

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Question 1 of 27070

Unusual noise coming from a refrigeration compressor can be caused by which of the following conditions?