When cleaning the interior areas and exterior surfaces of server cases, when do you NOT have to turn off the server before cleaning?

A.
When cleaning the interior areas and equipment.

B.
When cleaning the exterior surfaces.

C.
When cleaning the areas surrounding the ventilation slots.

D.
All of above.

Explanation:
When cleaning the exterior surfaces of the unit, you do not need to turn off the server.
Incorrect
Answers:
A: Cleaning of the interior of server cases requires care and caution when it comes to preventative maintenance. You must shut down the server unit being cleaned first and then remove the exterior cover of the server unit.
C: It is also recommended that you shut down the server before cleaning areas surrounding the ventilation slots.
D: When cleaning only the exterior surfaces of the unit, you do not need to turn off the server.
References:
Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 450-451.