A refrigeration system is operating with a vapor charged thermostatic expansion valve. The thermal bulb is sensing a suction line temperature that is higher than the temperature that allows liquid to be present in the bulb. Any additional increases in the evaporator load will ____.
A. increase the bulb pressure and cause the thermostatic expansion valve to open
B. increase the evaporator pressure and cause the thermostatic expansion valve to close
C. decrease the spring pressure and cause the thermostatic expansion valve to open
D. have no effect on the position of the needle (pin) in the seat
Answer: D
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