The primary function of line 'J' shown in the illustration is to __________. MO-0110

Correct Answer: Option A — remove air and non-condensable gases from the unit

The air ejector or vacuum pump system is critical for removing non-condensable gases, such as air, that enter the evaporator. If these gases accumulate, they blanket the heat transfer surfaces, significantly reducing the efficiency of the condenser and preventing the maintenance of the required vacuum.