The most prevalent cause of computer center fires is which of the following?

A.
AC equipment

B.
Electrical distribution systems

C.
Heating systems

D.
Natural causes

Explanation:
The most prevalent cause of computer center fires is electrical distribution systems.
Most computer circuits use only two to five volts of direct current, which usually cannot start a fire. If a fire does
happen in a computer room, it will most likely be an electrical fire caused by overheating of wire insulation or by
overheating components that ignite surrounding plastics. Prolonged smoke usually occurs before combustion.
Incorrect Answers:
A: AC equipment is not the most prevalent cause of computer center fires. Therefore, this answer is incorrect.
C: Heating systems are not the most prevalent cause of computer center fires. Computer centers use cooling
systems, not heating systems. Therefore, this answer is incorrect.
D: Natural causes are not the most prevalent cause of computer center fires. Computer centers are typically
protected against natural causes. Therefore, this answer is incorrect.

Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, 2013, p. 469