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NETA NETA_2 Exam Syllabus Topics:

SectionWeightObjectives
Topic 1: Systems and Commissioning5%- System-Level Testing
  • 1. System verification and documentation
    • 2. Commissioning procedures
      Topic 2: Electrical Testing Fundamentals and Theory25%- Measurement Principles
      • 1. Test data interpretation
        • 2. Instrumentation usage
          - Basic Electrical Theory
          • 1. AC/DC fundamentals
            • 2. Ohm's law and power relationships
              Topic 3: Component Testing55%- Electrical Equipment Testing
              • 1. Transformers insulation resistance testing
                • 2. Circuit breakers testing procedures
                  • 3. Cables and insulation diagnostics
                    • 4. Protective devices and relays overview
                      Topic 4: Safety15%- Electrical Safety Fundamentals
                      • 1. Hazard identification and risk mitigation
                        • 2. Lockout/Tagout procedures
                          • 3. Arc flash and shock hazard awareness

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                            NETA Level 2 Certified Assistant Electrical Testing Specialist 認定 NETA_2 試験問題 (Q53-Q58):

                            質問 # 53
                            A current of30 Ais measured using a100 A, 3% accuracyammeter. What is the maximum possibleactual error?

                            正解:D

                            解説:
                            Accuracy stated as ±3% of full scale means ±3 A on a 100 A meter. At a 30 A reading, this represents a possible error of±10%of the measured value. NETA Level 2 technicians must account for meter accuracy when interpreting readings, particularly at low portions of full-scale range.


                            質問 # 54
                            A ground conductor is routed through azero-sequence current transformer (CT)together with the phase conductors feeding the load. What is the most likely result?

                            正解:C

                            解説:
                            Zero-sequence (residual) ground-fault detection works by measuring thevector sum of currentspassing through a CT window. Under normal conditions, the three phase currents sum to approximately zero. If a ground fault occurs, the return current path bypasses the CT window, producing a net residual current that the CT detects.
                            If theequipment grounding conductor(or neutral/ground return conductor, depending on the scheme) is incorrectly passed through the same CT window along with the phase conductors, the ground-fault return current can be "captured" by the CT. This causes the residual sum to approachzero, even during an actual ground fault-meaning the protective function mayfail to operate.
                            NETA Level 2 technicians are expected to recognize correct CT installation practices, especially during commissioning and acceptance testing of ground-fault protection schemes. This includes verifying CT polarity, conductor routing, window CT content, and proper secondary wiring before performing injection or functional trip tests. Misrouting conductors is a classic cause of non-operational ground-fault protection.


                            質問 # 55
                            Following an insulation resistance test on a motor circuit, what procedure is required to safely return the circuit to a neutral charge state?

                            正解:A

                            解説:
                            Insulation resistance testing leaves stored electrical charge in the insulation. NETA standards require grounding the circuit forfour times the duration of the applied test voltageto safely dissipate stored energy.
                            Failure to do so can result in dangerous shock hazards even after testing is complete.


                            質問 # 56
                            During avacuum circuit breaker bottle integrity test, which hazardous energy may be produced?

                            正解:A

                            解説:
                            High-voltage vacuum integrity tests can generateX-raysdue to electron acceleration within the vacuum bottle.
                            NETA safety practices require distance, shielding, and time limitations during testing. Level 2 technicians must recognize non-obvious hazards associated with electrical testing, especially during high-voltage applications.


                            質問 # 57
                            Which of the following equations correctly represents the relationship betweencapacitance (C),charge (Q), andvoltage (V)?

                            正解:C

                            解説:
                            Capacitance is defined as the amount of electric charge stored per unit of voltage applied across a capacitor.
                            Mathematically, this relationship is expressed asC = Q / V, where capacitance is measured in farads, charge in coulombs, and voltage in volts. NETA Level 2 technicians must understand this fundamental relationship when interpreting capacitor test data, evaluating dielectric performance, and understanding how voltage stress affects insulation systems. This equation also underpins energy storage calculations and dielectric stress analysis in power system components.


                            質問 # 58
                            ......

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