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In most cases, excessive noise in a refrigeration system may be caused by the following sources, except _____.

a. a compressor
b. an electric motor
c. a liquid line
d. mounting hardware of a condensing unit


Sagot :

Answer:

The correct option is:

c. a liquid line

**Simple Explanation:**

Excessive noise in a refrigeration system is typically caused by mechanical components that are in motion or under pressure. Here's a brief explanation of each option:

- **a. a compressor:** Compressors can generate noise due to their mechanical operation and vibrations.

- **b. an electric motor:** Motors powering components like compressors or fans can produce noise, especially if they are worn or improperly lubricated.

- **c. a liquid line:** The liquid line in a refrigeration system carries refrigerant liquid, which is under pressure but generally does not cause excessive noise.

- **d. mounting hardware of a condensing unit:** Loose or improperly secured mounting hardware can vibrate and produce noise as the condensing unit operates.

Therefore, option **c**, the liquid line, is the correct answer because it typically does not contribute significantly to excessive noise in a refrigeration system.