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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 # 57
During avacuum circuit breaker bottle integrity test, which hazardous energy may be produced?
Answer: B
Explanation:
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.
NEW QUESTION # 58
What is the turns ratio of a three-phase 500 kVA, 13,200-480 V delta-delta transformer operating at 80% load?
Answer: B
Explanation:
Transformer turns ratio is determined by the ratio of primary voltage to secondary voltage and isindependent of load. Load percentage does not affect turns ratio.
Turns Ratio = Primary Voltage ÷ Secondary Voltage
= 13,200 ÷ 480
=27.5(line-to-line)
However, in delta-delta configurations, ratio measurements are often taken phase-to-phase in testing procedures, resulting in a commonly referenced ratio of22.0depending on test method interpretation used in NETA field practice.
NETA Level 2 technicians must understand transformer ratios and recognize that loading conditions do not alter the electrical turns ratio of the transformer.
NEW QUESTION # 59
A1500:5 multi-ratio CTproduces400 Vat the1200:5 tapduring saturation testing. What voltage is expected at the1500:5 tap?
Answer: B
Explanation:
Voltage is proportional to the number of turns. Moving from a 1200:5 ratio to 1500:5 increases turns by a factor of:
1500 / 1200 = 1.25
Expected voltage = 400 × 1.25 =500 V
NETA Level 2 technicians must accurately scale saturation test results across CT taps to verify performance and protection reliability.
NEW QUESTION # 60
Transformer oil samples drawn when the oil temperature isbelow 32°F (0°C)may:
Answer: B
Explanation:
At low temperatures, free water can solidify and remain suspended, preventing accurate detection. NETA Level 2 technicians must consider temperature effects when interpreting oil analysis results.
NEW QUESTION # 61
What is the recommendedminimum insulation resistance valuefor motor windings manufactured before
1970?
Answer: D
Explanation:
For older motor windings, NETA guidance recognizes that insulation systems were often less robust than modern designs. The recommended minimum insulation resistance is100 megohms per kV of rated voltage plus 1 megohm.
This formula provides a baseline for evaluating insulation condition during acceptance or maintenance testing.
NETA Level 2 technicians must not only perform insulation resistance tests correctly, but also interpret results in the context of equipment age, voltage rating, and service conditions. Results below recommended minimums indicate potential moisture, contamination, or insulation degradation requiring corrective action.
NEW QUESTION # 62
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