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Ten questions from the Safety group. Attempt all ten before checking the key. Suggested pass mark: 8/10.

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Questions

1. After powering an inverter fully OFF, how long must you wait before opening any cover?
  • A. 30 seconds
  • B. 5 minutes
  • C. 15 minutes
  • D. No wait needed if the display is dark
2. The Kent G3 PV DC switch may only be operated when the string current is:
  • A. Below 5 A
  • B. Below 2 A
  • C. Below 0.5 A
  • D. Any value — the switch is load-rated
3. Who may open an inverter enclosure to work on internal parts?
  • A. Any electrician with a licence
  • B. The installing technician, after the discharge wait
  • C. Nobody in the field — there are no user-serviceable parts inside; internal work is Kent service
  • D. The customer, for dust cleaning only
4. During operation the inverter heat-sink can reach approximately:
  • A. 45 °C
  • B. 60 °C
  • C. 75 °C
  • D. 95 °C
5. The correct power-OFF order on both platforms is:
  • A. The exact reverse of power-on — battery side first, grid AC last
  • B. Grid AC first, battery last
  • C. PV DC switch first, always
  • D. Any order, as long as the display is off first
6. PPE must be worn:
  • A. Only for battery work
  • B. Only when the unit is energised
  • C. During the entire installation process
  • D. Only during AC terminations
7. For battery work, the manual’s own footwear/hand protection rule is:
  • A. Cotton gloves are sufficient
  • B. Put on rubber shoes and gloves
  • C. Standard site boots are enough
  • D. No specific rule exists
8. Grid protection points (voltage/frequency trip settings) may be changed:
  • A. Whenever the customer’s DISCOM seems strict
  • B. Freely, if exports look wrong
  • C. Once per season
  • D. Only with utility consent, by authorized personnel
9. After the labelled discharge wait, before touching conductors you must also:
  • A. Tap the terminals with an insulated tool
  • B. Meter-verify that no dangerous voltage remains
  • C. Wait another 5 minutes
  • D. Nothing further — the wait is sufficient
10. The Kent rule for the earth-pit reading at every site is:
  • A. Measure it and photograph the reading; escalate poor soil to Kent before energising
  • B. Assume the builder’s earth is fine
  • C. Only measure on commercial sites
  • D. Quote the manual’s 5 Ω figure to the customer

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Answer key

  1. B
  2. C
  3. C
  4. C
  5. A
  6. C
  7. B
  8. D
  9. B
  10. A