Refrigeration & Air Conditioning USCG Question #637 (Set 12)

Which of the statements listed is applicable to the thermostatic expansion valve shown in the illustration? 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 B — The control bulb is located on the evaporator coil outlet.

Thermodynamic control of a thermostatic expansion valve relies on sensing bulb temperature and pressure mounted directly on the evaporator coil outlet tailpipe to regulate proper superheat entering the suction line.

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