Question 756Deck Safety70% to pass
Large volumes of carbon dioxide are safe and effective for fighting fires in enclosed spaces, such as in a pump room, provided that the _______________.
AI Explanation
The correct answer is D) the ventilation system is secured and all persons leave the space.
The use of carbon dioxide (CO2) as a fire extinguishing agent in enclosed spaces, such as pump rooms, requires that the space be evacuated of all personnel. This is because CO2 displaces the oxygen in the air, creating an oxygen-deficient atmosphere that can quickly become hazardous or even fatal to anyone remaining in the space. Securing the ventilation system ensures that the CO2 remains in the space and effectively suppresses the fire.
The other options are incorrect because: A) wearing damp cloths over the mouth and nose would not provide adequate protection against the oxygen-deficient atmosphere; B) keeping the ventilation system operating would dilute the CO2 concentration and reduce its fire-fighting effectiveness; and C) gas masks would not be sufficient to protect against the lack of oxygen in the space.
Related Questions
#754 Which statement concerning carbon dioxide is FALSE? #755 While you are working in a space, the fixed CO2 system is accidentally activated. You should _______________.#757 The safety discs on carbon dioxide cylinders are set to release at 2,700 psi. Under normal circumstances this pressure will be reached at a temperature of _______________.#758 CO2 cylinders equipped with pressure actuated discharge heads will discharge automatically when _______________.#759 Spaces protected by a fixed CO2 system must be equipped with an alarm which sounds _______________.