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NETA Level II (NETA 2) Certification Exam Questions and Correct Answers (500+ Questions) | Electrical Testing, Protective Relays, Transformers, Switchgear, NFPA 70E & OSHA Safety | InterNational Electrical Testing Association (NETA)

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Prepare confidently for the NETA Level II (NETA 2) Certification Examination with this comprehensive collection of 500+ exam-style questions and verified correct answers covering the essential principles of electrical testing, acceptance testing, maintenance testing, protective relays, transformers, switchgear, electrical safety, and power system diagnostics. This study guide provides extensive coverage of NETA ATS and MTS standards, transformer testing, insulation resistance testing, dielectric testing, power factor testing, turns ratio testing (TTR), circuit breakers, protective relays, current transformers (CTs), potential transformers (PTs), switchgear, switchboards, motor testing, medium-voltage cables, grounding systems, lockout/tagout (LOTO), NFPA 70E, OSHA regulations, confined space safety, arc flash, personal protective equipment (PPE), electrical calculations, harmonics, batteries, power quality, protective device coordination, relay testing, and electrical troubleshooting. Presented in a structured question-and-answer format, this resource strengthens technical knowledge, reinforces industry standards, and prepares technicians for success on NETA certification examinations and field testing assignments. This exam preparation guide delivers an in-depth review of the theory and practical skills required for electrical acceptance and maintenance testing in commercial, industrial, and utility power systems. Learners will strengthen their understanding of transformer diagnostics, insulation resistance and polarization index testing, dielectric absorption ratio (DAR), low-resistance ohmmeter (DLRO) testing, protective grounding, relay device functions, current transformer saturation, circuit breaker operation, withstand testing, surge arresters, power factor correction, switchgear maintenance, grounding resistance measurements, battery systems, confined space procedures, electrical hazard analysis, approach boundaries, lockout/tagout procedures, personal protective equipment, electrical symbols, motor performance calculations, power triangle analysis, AC and DC circuit theory, harmonics, cable fault location, infrared thermography, power quality, and protective coordination. The organized question-and-answer format makes this document an excellent resource for certification preparation, apprenticeship training, technical college coursework, continuing education, and professional development in electrical testing and commissioning. The content aligns with the competencies established by the InterNational Electrical Testing Association (NETA) for Level II certification and complements widely recognized industry standards, including NETA ATS (Standard for Acceptance Testing Specifications for Electrical Power Equipment & Systems), NETA MTS (Standard for Maintenance Testing Specifications for Electrical Power Equipment & Systems), NFPA 70E: Standard for Electrical Safety in the Workplace, the National Electrical Code (NFPA 70), and relevant OSHA electrical safety regulations. These authoritative references provide the technical foundation for electrical testing, commissioning, maintenance, safety compliance, and power system reliability. References (APA 7th Edition) InterNational Electrical Testing Association. (2023). ANSI/NETA ATS—Standard for Acceptance Testing Specifications for Electrical Power Equipment & Systems. InterNational Electrical Testing Association. InterNational Electrical Testing Association. (2023). ANSI/NETA MTS—Standard for Maintenance Testing Specifications for Electrical Power Equipment & Systems. InterNational Electrical Testing Association. National Fire Protection Association. (2024). NFPA 70E: Standard for Electrical Safety in the Workplace. National Fire Protection Association. National Fire Protection Association. (2023). NFPA 70: National Electrical Code. National Fire Protection Association. Occupational Safety and Health Administration. (2024). 29 CFR 1910 Subpart S—Electrical & 29 CFR 1910.147—The Control of Hazardous Energy (Lockout/Tagout). U.S. Department of Labor. Relevant Students: NETA Level II certification candidates, Electrical Testing Technicians, Electrical Commissioning Technicians, Electrical Maintenance Technicians, Field Service Engineers, Substation Technicians, Relay Protection Technicians, Power Systems Technicians, Industrial Electricians, Electrical Engineering Technology students, High Voltage Testing students, Electrical Apprentices, Utility technicians, Electrical Inspectors, Commissioning Engineers, Power Distribution professionals. Keywords: NETA Level II, NETA 2, NETA certification, NETA ATS, NETA MTS, electrical testing, acceptance testing, maintenance testing, protective relays, relay testing, transformer testing, insulation resistance, megger testing, polarization index, PI test, dielectric absorption ratio, DAR test, power factor testing, transformer turns ratio, TTR, circuit breakers, switchgear, switchboards, current transformers, CT testing, potential transformers, PT testing, grounding systems, grounding resistance, DLRO, lockout tagout, LOTO, NFPA 70E, OSHA electrical safety, arc flash, confined space, electrical calculations, harmonics, medium-voltage cables, battery systems, surge arresters, motor testing, power quality, electrical commissioning, electrical maintenance, exam questions, practice questions

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NETA 2 2026/2027 Exam
Questions and Answers |
Already Graded A+



Under what considerations can tag out without lock out be permitted? -

ANSWER ✔✔***&If an energy isolating device is not capable of being

locked

For PV systems, a(n) _____ is a device that changes direct-current input

to an alternating-current output. - ANSWER ✔✔Inverter


Identify the contact pictured above. (NC and NO separated by a node) -

ANSWER ✔✔Form C

,When applying personal protective grounds, which end is attached first?

- ANSWER ✔✔***&The equipment end


An induction motor has 40kVA input power, a power factor of 82 percent,

and an efficiency of 92 percent. What is the horsepower? - ANSWER

✔✔***&30.2 HP


How many connection points would you expect to find on a kelvin

bridge? - ANSWER ✔✔4


You arrive at a job to perform acceptance testing on a new-indoor 15KV

switch lineup. While the equipment has been installed multiple covers

are off there are power conductors hanging with taped ends. What

should you do? - ANSWER ✔✔***&Visually confirm that the source of

power have already been de-energized and lock out

What is the turns ratio of a 3-phase 500kVA, 13,200-480 volt rated delta-

delta transformer that is 80% loaded? - ANSWER ✔✔***&22.000


***27.500

ASTM D 924 is a required acceptance test for liquid-filled transformers

with natural ester insulating fluid per NETA standards. - ANSWER

✔✔***&True

,NETA-ATS requires test decals be affixed on the exterior of equipment

or equipment enclosure of protective devices after performing electrical

tests. Which color test decal would you affix to a piece of equipment with

a minor deficiency that does not affect its fault detection or operation? -

ANSWER ✔✔Yellow


What is meant by a "dead tank breaker?" - ANSWER ✔✔The

external tank is grounded.

If you have your ground conductor running through your zero-sequence

CT with your current carrying conductors, what will happen? -

ANSWER ✔✔Ground fault protection won't function


Which of the following would best describe a 52 device: - ANSWER

✔✔AC circuit breaker


A series circuit has two resistors. The resistors dissipate 10 W and 15 W.

What is the total power dissipation of the circuit? - ANSWER ✔✔25

W

Which of the following would be the best choice for use in both the

conductive and mechanical areas of circuit breakers and switches? -

ANSWER ✔✔Mobil 28




COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2026. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED

, What is the power factor temperature correction value for new mineral

oil? - ANSWER ✔✔***&20C/40C


OSHA requires the testing of a volt meter after a voltage test on voltage

above ______. - ANSWER ✔✔600V


A tagout device must be strong enough to remain attached under a

minimum of ____ lbs of force. - ANSWER ✔✔50


A piece of wire that is 0.001 inches in diameter and 12 inches long is

one mil-foot. - ANSWER ✔✔True


At least 2 entrances of sufficient area must be provided giving access to

the electrical equipment working space. - ANSWER ✔✔***&True


What is the Restricted Approach Boundary for a 69kV system? -

ANSWER ✔✔***&3 ft 10 in.


Which portion of the transmission system experiences faults occur most

frequently? - ANSWER ✔✔Overhead lines


To reverse the direction of rotation of a three-phase motor, reverse: -

ANSWER ✔✔any two leads

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