Question 235Safety & Environmental - Assistant Engineer70% to pass
In the event of a fire, the doors to a stair tower must be closed to prevent the spread of fire by _______________.
AI Explanation
The correct answer is A) convection.
The doors to a stair tower must be closed to prevent the spread of fire by convection. Convection is the transfer of heat through the movement of fluids, such as air or gases. When a fire occurs, the hot air and gases rise, creating a convection current that can carry the fire and smoke to other areas of the building. Closing the stair tower doors helps to contain the fire and smoke within the stair tower, preventing it from spreading to other parts of the building through this convection process.
The other options are incorrect because:
B) Conduction is the transfer of heat through direct contact, which is not the primary mechanism by which fire spreads in this scenario.
C) Radiation is the transfer of heat through electromagnetic waves, which is also not the primary mechanism.
D) Ventilation refers to the process of providing fresh air, which is not the specific reason for closing the stair tower doors.
Related Questions
#233 To prevent the spread of fire by convection you should _______________.#234 The spreading of fire as a result of heat being carried through a vessel's ventilation system is an example of heat transfer by _______________.#236 The air flow depicted in figure 1 of the illustration is an example of which type of ventilation? Illustration SF-0013 #237 Radiation can cause a fire to spread by _______________.#238 Through which of the listed processes is sufficient heat produced to cause spontaneous ignition?