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NETA NETA_2 Exam Syllabus Topics:

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

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                            NETA Level 2 Certified Assistant Electrical Testing Specialist Sample Questions (Q21-Q26):

                            NEW QUESTION # 21
                            For photovoltaic (PV) systems, which device converts direct-current (DC) input into alternating-current (AC) output?

                            Answer: C

                            Explanation:
                            Photovoltaic systems generatedirect current (DC)electricity as a result of solar energy interacting with semiconductor materials. However, most building electrical systems and utility grids operate onalternating current (AC). The device responsible for converting DC output from PV arrays into usable AC power is an inverter.
                            Inverters perform more than simple conversion. Modern PV inverters also regulate voltage, synchronize frequency and phase with the utility grid, provide ground-fault detection, and include anti-islanding protection. NETA Level 2 technicians are expected to understand inverter operation because acceptance and maintenance testing often includes verifying correct inverter output voltage, frequency, and protective functions.
                            A rectifier performs the opposite function, converting AC to DC, and is commonly found in battery chargers and DC power supplies. Transformers change voltage levels but do not convert DC to AC.Converters may change DC voltage levels but do not produce alternating current.
                            Understanding inverter functionality is essential when testing renewable energy systems, performing commissioning activities, and verifying compliance with applicable electrical and safety standards.


                            NEW QUESTION # 22
                            During aCT saturation test, voltage increases sharply with little increase in current. What does this indicate?

                            Answer: C

                            Explanation:
                            A sharp rise in voltage with minimal increase in current indicates the CT core has reachedmagnetic saturation. Beyond this point, the CT cannot accurately reproduce primary current. NETA Level 2 technicians must identify saturation points to ensure CTs are suitable for protection applications and that relay performance will be reliable during high-current faults.


                            NEW QUESTION # 23
                            In azone-interlocked low-voltage circuit breakerscheme, if the breaker responsible for clearing a fault fails to operate, which statement is correct?

                            Answer: B

                            Explanation:
                            Zone-selective interlocking (ZSI) improves coordination by allowing downstream devices to trip first while restraining upstream devices. If the downstream breaker fails to clear the fault, restraint signals are removed and thenext upstream breaker tripsto isolate the fault.
                            NETA Level 2 technicians must understand this fail-safe behavior when commissioning protection systems and validating coordination logic.


                            NEW QUESTION # 24
                            A delta-connected load has aphase impedance of 12 #and is supplied from a480 V line-to-line source. What is theline current?

                            Answer: D

                            Explanation:
                            For delta systems:
                            Phase voltage = Line voltage = 480 V
                            Phase current = V / Z = 480 / 12 = 40 A
                            Line current = #3 × Phase current
                            = 1.732 × 40 #69.3 A
                            NETA Level 2 technicians must correctly distinguish between phase and line quantities when evaluating three- phase systems, as incorrect assumptions frequently lead to misinterpreted test results.


                            NEW QUESTION # 25
                            A battery bank consists of60 cells, each rated2 V. What is thenominal DC voltageof the battery bank?

                            Answer: C

                            Explanation:
                            Battery bank voltage is calculated by summing the individual cell voltages in series:
                            60 × 2 V =120 V
                            NETA Level 2 technicians routinely test station batteries used for control power and protection systems.
                            Accurate voltage verification is critical for ensuring breaker tripping capability and relay operation during loss of AC power.


                            NEW QUESTION # 26
                            ......

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