USCG USCG General Eng
Set 16 • Question #235 of 498
Launch Interactive Practice Room If the suction line between the evaporator and compressor is frosting up, the cause may be due to the thermal expansion valve __________.
A
thermal bulb coming loose from the suction line
✓ Correct Answer
B
needle valve is stuck closed
C
thermal bulb is in a cold air stream
D
all of the above
USCG NMC Regulatory Explanation
The Thermostatic Expansion Valve (TXV) regulates liquid refrigerant injection into the evaporator coil based on vapor superheat at the evaporator outlet, preventing liquid slugging into the compressor.
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