Practice Quiz

CompTIA DHTI+ Practice Questions - Question List

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71. You are troubleshooting a dimmer control where the lamp remains ON even after disconnecting the neutral wire. Which of the following could be the likely cause of this issue?
  1. Improper AC connections
  2. The dimmer’s Thyristor is bad
  3. Dimmer control is faulty
  4. Improper Min or Max setting on dimmer
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72. You are troubleshooting an issue with an incandescent lamp. The incandescent lamp brightens or dims when other fixtures are turned ON or OFF. Which of the following should you do to fix this problem?
  1. Check the neutral connection in the main electrical panel.
  2. Check circuit to correct over voltage situation.
  3. Check the wattage of the lamp and match it to the fixture.
  4. Replace the lamp.
See answer
73. You are trying to help a customer fix a lighting issue. Which of the following should you do before starting the troubleshooting activities?
  1. Disconnect all AC controls
  2. Debrief the customer
  3. Retest the system
  4. Apply all manufacturer upgrades
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74. Which of the following defines the voltage at which a surge suppressor begins to protect the circuit?
  1. Clamping voltage
  2. Protection voltage
  3. Suppressing voltage
  4. Surge voltage
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75. 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?
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