Question 4Refrigeration & AC - 1st Asst/Chief

The correct answer is C) the valve will further close, raising evaporator pressure and lowering suction pressure. When the applied voltage and current draw to the normally open (NO) suction modulation valve increase, the valve will further close. This is because an increase in voltage and current will cause the valve to actuate and close, restricting the flow of refrigerant through the suction line. As a result, the evaporator pressure will increase, and the suction pressure will decrease. The other options are incorrect because they do not accurately describe the behavior of the suction modulation valve when the voltage and current draw increase. Increasing the voltage and current will not cause the valve to further open, as that would be the opposite of how the valve is designed to operate.