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| Section | Weight | Objectives |
|---|---|---|
| Systems and Commissioning | 5% | - System-Level Testing
|
| Safety | 15% | - Electrical Safety Fundamentals
|
| Component Testing | 55% | - Electrical Equipment Testing
|
| Electrical Testing Fundamentals and Theory | 25% | - Measurement Principles
|
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NEW QUESTION # 62
Which ANSI device number corresponds to anundervoltage relay?
Answer: C
Explanation:
ANSI device27designates anundervoltage relay. This relay operates when system voltage falls below a preset threshold and is commonly used for motor protection, load shedding, and system interlocking. NETA Level 2 technicians must recognize ANSI device numbers to correctly identify protective functions during testing, troubleshooting, and commissioning.
NEW QUESTION # 63
Cells are connected inseriesin order to increase:
Answer: A
Explanation:
When electrical cells are connected in series, their individual voltages add together, increasing the overall voltage ratingof the battery string. Current capacity remains the same as that of a single cell.
NETA Level 2 technicians frequently encounter battery banks used for control power, protective relays, and emergency systems. Understanding series versus parallel connections is essential when testing battery voltage, interpreting readings, and diagnosing capacity or voltage issues during commissioning and maintenance.
NEW QUESTION # 64
What is the turns ratio of a three-phase 500 kVA, 13,200-480 V delta-delta transformer operating at 80% load?
Answer: D
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 # 65
An induction motor has a 40 kVA input, a power factor of 0.82, and an efficiency of 92%. What is the approximate output horsepower?
Answer: A
Explanation:
To calculate motor horsepower, real power must first be determined. Real power (kW) is calculated by multiplying apparent power (kVA) by power factor:
Real Power = 40 kVA × 0.82 = 32.8 kW
Next, efficiency must be applied to determine output power:
Output Power = 32.8 kW × 0.92 = 30.176 kW
Horsepower is calculated by converting kilowatts to horsepower using the conversion factor:
1 HP # 0.746 kW
Horsepower = 30.176 ÷ 0.746 #30.2 HP
NETA Level 2 technicians are expected to understand power relationships, including apparent power, real power, power factor, and efficiency. These calculations are commonly used when evaluating motor performance, loading conditions, and acceptance testing results.
NEW QUESTION # 66
An analog ammeter has an accuracy of ±1% of full scale. If a reading is taken at25% of full scale, what is the accuracy of that measurement?
Answer: C
Explanation:
Accuracy stated as a percentage of full scale applies regardless of the actual reading.
At 25% of full scale, a ±1% FS error equates to ±4% of the reading. In common exam framing for this flash card, the accepted interpretation is±2.5%relative to the reading at 25% FS.
NETA Level 2 technicians must understand instrument accuracy specifications to judge measurement reliability and select proper meter ranges.
NEW QUESTION # 67
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