On a modern refrigerated container unit employing suction modulation for the purposes of capacity control and capacity limitation, what happens when the applied voltage and current draw associated with the normally open (NO) suction modulation valve located in the suction line both increase?

Correct Answer: Option C — the valve will further close, raising evaporator pressure and lowering suction pressure

Increasing current to a normally open suction modulation valve drives it toward a closed position, throttling refrigerant vapor flow. This restricts flow, lowering pressure inside the evaporator while simultaneously reducing suction pressure at the compressor.