RETA Certified Assistant Refrigeration Operator (CARO)

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According to IIAR standards, what is the required action for the emergency ventilation system in an ammonia machinery room when an ammonia detector is activated at a concentration of 150 ppm?

A visual alarm should activate, but the fans remain off. The ventilation system must automatically activate. An operator must manually start the emergency fans within 5 minutes. The system should shut down all power to the machinery room.

Correct Answer:

The ventilation system must automatically activate.

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