220-1102 Question 717
Single answerFire safetyWhile replacing a failed power supply in a server room, a technician notices sparks and a small flame coming from the back of a rack-mounted UPS. The room is beginning to fill with a light haze, but the fire is still contained to the electrical equipment. What should the technician do FIRST?
- A
Use a Class C fire extinguisher on the UPS while keeping a clear exit path
- B
Pour water on the UPS to cool the electrical components and stop the fire from spreading
- C
Open the UPS casing to disconnect the internal battery before attempting to extinguish the fire
- D
Move the UPS away from the rack to prevent damage to nearby equipment
Show answer and explanation
Correct answer: A
Explanation
For CompTIA A+ Core 2 fire safety objectives, technicians are expected to recognize the appropriate response to common workplace fire scenarios. Fires involving energized electrical equipment require a Class C extinguisher. Water-based suppression is inappropriate until the equipment is fully de-energized, because of shock risk. In a real environment, the technician should also activate emergency response procedures according to company policy, alert others, and evacuate if the fire cannot be controlled immediately. This aligns with standard workplace safety guidance and common fire classification practices used in IT environments.
- A. Correct.
Correct. A fire involving energized electrical equipment should be treated as a Class C fire. The technician should use the proper extinguisher type and maintain personal safety, including keeping an exit route available. This is the most appropriate immediate response for a small, contained electrical fire in IT equipment.
- B. Incorrect.
Incorrect. Water should not be used on energized electrical fires because it can conduct electricity and increase the risk of shock or injury. This is a common but dangerous mistake, especially when someone focuses on cooling the equipment rather than the electrical hazard.
- C. Incorrect.
Incorrect. Opening the UPS during an active fire is unsafe. UPS units can contain hazardous voltage and batteries, and opening the enclosure can expose the technician to electrical shock, arc hazards, or worsening fire conditions. Fire response comes before equipment disassembly.
- D. Incorrect.
Incorrect. Attempting to move burning electrical equipment is hazardous and can spread the fire or injure the technician. Best practice is to use the correct extinguisher if the fire is small and manageable, evacuate if necessary, and follow emergency procedures rather than relocating active burning equipment.