Question 5Refrigeration & AC - Assistant Engineer

The correct answer is D) on top of the chiller evaporator shell. The rupture disc is located on the evaporator shell because it is the most likely point of overpressure in a low-pressure centrifugal refrigeration system. When the compressor is idle, the refrigerant can continue to vaporize in the evaporator, causing the pressure to rise. The rupture disc is placed on the evaporator shell to protect it from this over-pressurization. The other options are incorrect because the condenser (A), compressor discharge (B), and economizer (C) are not the most likely points of overpressure when the compressor is not running.