Question 49Refrigeration & AC - Assistant Engineer

The correct answer is C) With a condenser fitted with a single fan driven by a multi-speed electric motor, the fan speed would decrease under low ambient temperature conditions. This is correct because in an air-cooled refrigeration system, the fan cycling control pressure switch is designed to regulate the fan speed based on the condenser pressure. When ambient temperatures are low, the condenser pressure will also be low, causing the pressure switch to decrease the fan speed to maintain the proper pressure in the refrigeration system. This helps to prevent overcooling and ensures efficient operation of the system. The other options are incorrect because they do not accurately describe the function of the fan cycling control pressure switch in an air-cooled refrigeration system with a single fan driven by a multi-speed motor.