Where is the muffler located?

• A. Between evaporator and compressor
• B. Between receiver and evaporator
• C. Between the compressor and condenser
• D. In the suction line

Answer: (C)

A muffler is used to absorb the compressor’s discharge pulsations and cut down noise by smoothing the high‑pressure vapor as it leaves the compressor. Placing it in the discharge line between the compressor and the condenser lets those pressure fluctuations be damped before the gas enters the condenser, reducing noise, vibration, and potential wear in the downstream piping. Putting a muffler on the suction side wouldn’t address the pulsations produced by the compressor and could affect oil return and efficiency, while in the liquid line between the receiver and evaporator it wouldn’t dampen the gas pulsations effectively and would introduce unnecessary pressure drop.