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CompTIA DHTI+ Practice Questions

Category - DHTI

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You are assisting a customer who has issues with his PLC home automation system. He complains that three of the lights in a room turn ON and OFF intermittently. Which of the following should you ask the customer first?
  1. Are the light bulbs in the room securely installed?
  2. Have you removed or replaced the PLC lighting modules?
  3. Have you added any new electrical devices in service at home?
  4. Have you plugged any new electrical devices into the electrical circuits in the room in question?
Explanation
Answer - D -You should ask the customer if he has plugged any new electrical devices into the electrical circuits in the room in question.

Key Takeaway: You should always start at the source of the problem and work outwards. An electrical device put into service in the same room will usually have a more immediate impact on the system than one in another part of the house. So start eliminating the probable point of failures starting with the room in question first.
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