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| Section | Weight | Objectives |
|---|---|---|
| Safety | 15% | - Electrical Safety Fundamentals
|
| Electrical Testing Fundamentals and Theory | 25% | - Basic Electrical Theory
|
| Systems and Commissioning | 5% | - System-Level Testing
|
| Component Testing | 55% | - Electrical Equipment Testing
|
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NEW QUESTION # 94
Why shouldlint-free ragsbe used when cleaning circuit breaker components?
Answer: D
Explanation:
Lint fibers can attract dust, moisture, and contaminants, which may degrade insulation and interfere with mechanical movement. NETA Level 2 technicians are expected to maintain cleanliness during maintenance and testing activities to prevent introducing foreign material that could affect breaker performance or reliability.
NEW QUESTION # 95
The three-phase connection in whichone end of each winding is connected togetheris called which configuration?
Answer: C
Explanation:
In awye (star)connection, one end of each phase winding is tied together at a common point known as the neutral. This configuration allows for both line-to-line and line-to-neutral voltages and is commonly used in distribution systems.
NETA Level 2 technicians must understand transformer and system configurations because they affect voltage relationships, current flow, grounding methods, and testing procedures. Identifying a wye connection is essential when interpreting nameplates, calculating phase voltages, and performing ratio or insulation testing.
NEW QUESTION # 96
Evaluate the expression:
Answer: C
Explanation:
Exponentiation applies to both numerator and denominator:
NETA Level 2 technicians are expected to demonstrate basic mathematical competency for interpreting test data and calculations.
NEW QUESTION # 97
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?
Answer: C
Explanation:
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.
NEW QUESTION # 98
Which portion of a three-phase system carries current through the windings of a transformer or motor?
Answer: B
Explanation:
Phase currentis the current that flows through each individual winding of a three-phase device such as a transformer or motor. Understanding the difference between phase current and line current is critical because their magnitudes differ depending on whether the system is configured as wye or delta. NETA Level 2 technicians must correctly identify which current is being measured to avoid misinterpreting test results during commissioning, troubleshooting, and performance verification.
NEW QUESTION # 99
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