Electrical safety standards exist to help us work safely on or around electrical equipment. One key element in avoiding electrical hazards is identifying energized parts. NETA Certified Technicians must do everything possible to eliminate their exposure.
1. What is the best information source for selecting isolation points when preparing an isolation plan?
a. Schematic diagram
b. Single-line diagram
c. Visual inspections
d. Process and instrumentation diagram
2. Which of the following isolation steps is performed last?
a. Apply locks to isolation points
b. Test for potential
c. Rack out the breaker
d. Apply temporary protective grounds
3. If known energized electrical equipment is in the work area, it is best practice to:
a. Postpone the job
b. Identify it with appropriate alerting techniques
c. De-energize the equipment
d. File a complaint
4. When taking a partial outage on a switchgear, it is important to:
a. Identify any sections containing energized parts with red flagging
b. Communicate the need to test for voltage with the crew
c. Prohibit entry into energized sections
d. All of the above
5. Once work begins, what action should you take whenever you enter a section for the first time?
a. Call out to other personnel
b. Test for the presence of voltage
c. Flash-off terminals with a jumper
d. Ask your job lead for permission
6. How must a protective relay be isolated to control the shock hazard?
a. Isolate wiring when injecting from a test set
b. Ensure any associated breakers are isolated
c. Isolate potential transformers
d. All of the above
7. How can equipment still be energized with system voltage when it is part of a lockout?
a. Failed isolation point
b. Outdated drawing
c. Temporary generator applied
d. All of the above
Morgan Gieni, CET, PSE, is the Technical Support Lead — Technical Field Services (TFS) at Magna IV Engineering. He is an ASET Certified Engineering Technologist and a NETA Level 4 Certified Senior Technician and is on NETA’s Technical Resource Committee.