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

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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?