Question 5Refrigeration & AC - Assistant Engineer
70% to passThe rupture disc on a low-pressure centrifugal refrigeration unit is used as an overpressure protection device and is set to relieve at 15 psig and is most likely to lift when the compressor is idle. Where is the rupture disc located?
Aon top of the condenser shell
Bat the discharge of the compressor
Cat the top of the upper chamber of the economizer
Don top of chiller evaporator shell
AI Explanation
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.
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