If the evaporator coil horizontal return line of a container refrigeration system is less than 0.875" (2.21 cm) in diameter (considered small); the thermostatic expansion valve sensing bulb should be attached where on the return line?
Official USCG Answer & Rule Citation
Correct Answer: Option A — on the upper surface of the line
Under USCG National Maritime Center examination standards, the accepted correct answer is: on the upper surface of the line.
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