Engine Refrigeration (Supplementary) USCG Question #470 (Set 7)

Which of the statements listed is applicable to the thermostatic expansion valve shown in the illustration? GS-RA-07 Illustration GS-RA-07: the U.S. Coast Guard has not released this illustration.

Official USCG Answer & Rule Citation

Correct Answer: Option D — The control bulb is located on the evaporator coil outlet.

The thermostatic expansion valve sensing bulb must be clamped securely to the evaporator coil outlet line to accurately measure suction vapor temperature and control superheat entering the compressor.

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