Exam CISA topic 1 question 112 discussion

Water + electricity power = danger

Answer: C

Carbon dioxide (CO2) fire suppression systems are designed to extinguish fires by reducing the level of oxygen that supports combustion. However, CO2 systems pose a significant risk to human life because they can lead to suffocation if individuals are present in the area when the system discharges. Due to this risk, CO2 systems are often used in unoccupied spaces or are designed to allow for evacuation before discharge. In addition to the risk to humans, the use of CO2 as a fire suppression agent does not remove the electrical energy that may have caused the fire, potentially allowing the fire to reignite once the CO2 has dissipated. Therefore, it's important that these systems be combined with an automatic switch to shut down the electricity supply in the event of activation. This helps ensure that the electrical source of the fire is also cut off, preventing re-ignition.

Carbon dioxide (CO2): This gas displaces oxygen to extinguish fires. It displaces oxygen so rapidly that it can cause suffocation in occupied spaces. To prevent this risk during accidental discharge, an automatic power shutoff is crucial.

When the sprinkler head is activated by heat from a fire, the air in the pipe is discharged from the head, causing the pressure in the pipe to drop and water to be discharged from the sprinkler head.

B is the right one , water is conductor of electricity , there is a risk electrochoc ,

건식파이프는 자동스위치와 장비보호를 위해 연결이 팔요함

C. Carbon dioxide