A technician is investigating intermittent switch degradation. The issue only seems to occur when
the building’s roof air conditioning system runs. Which of the following would reduce the
connectivity issues?

A.
Adding a heat deflector

B.
Redundant HVAC systems

C.
Shielding

D.
Add a wireless network

Explanation:
EMI can cause circuit overload, spikes, or even electrical component failure. In the question it is
mentioned that switch degradation occurs when the building’s roof air-conditioning system is also
running. All electromechanical systems emanate EMI. Thus you could alleviate the problem using
EMI shielding.