A fully updated 2026 NETA_2 Exam Dumps exam guide from training expert Exam4Free
Provides complete coverage of every objective on exam and exam preparation NETA_2
NEW QUESTION # 60
A piece of wire that is0.001 inchesin diameter and12 incheslong is defined as onemil-foot.
- A. False because length must be 1 foot, not 12 inches
- B. True only for copper wire
- C. True
- D. False
Answer: C
Explanation:
Amilis one-thousandth of an inch (0.001 in). Amil-footis a reference unit used in conductor resistance calculations. It describes a conductor that is1 mil in diameter and 1 foot long. Since 12 inches equals 1 foot, the statement is correct.
This unit supports standardized resistance formulas such as:
R = (K × L) / CM
where R is resistance, K is the resistivity constant, L is length, and CM is circular mil area. While technicians in the field often rely on tables and software, NETA Level 2 fundamentals include understanding what these units represent so results and conductor resistance expectations can be sanity-checked.
This concept also appears when evaluating long cable runs, verifying conductor sizing, or interpreting low- resistance measurements where expected values are small and sensitive to length and cross-sectional area.
NEW QUESTION # 61
Which ANSI device number corresponds to anundervoltage relay?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: B
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 # 62
Arc-flash incident energy is expressed in:
- A. Amperes
- B. Calories per square centimeter
- C. Volts per meter
- D. Joules
Answer: B
Explanation:
Incident energy quantifies thermal exposure from an arc flash and is expressed incal/cm². This value is used to determine PPE requirements and safe work practices.
NEW QUESTION # 63
Electromotive force (EMF) is measured in:
- A. Amperes
- B. Volts
- C. Watts
- D. Ohms
Answer: B
Explanation:
Electromotive force represents electrical potential difference and is measured involts. NETA Level 2 technicians encounter EMF when evaluating generators, transformers, batteries, and induced voltages during testing and commissioning activities.
NEW QUESTION # 64
Cells are connected inparallelin order to increase:
- A. Internal resistance
- B. Current capacity
- C. Voltage rating
- D. Power factor
Answer: B
Explanation:
When cells are connected in parallel, the voltage of the battery bank remains the same as a single cell, but the current capacity (ampere-hours)increases. Parallel connections allow multiple cells to share load current, increasing the total available current without increasing voltage. NETA Level 2 technicians frequently encounter parallel battery strings in control power systems and must understand this relationship when evaluating capacity, load testing, and charger performance.
NEW QUESTION # 65
What is the distance between points (3,5) and (4,5) on a rectangular coordinate grid?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
Explanation:
The distance between two points with the same y-coordinate is the absolute difference in their x-coordinates.
|4 # 3| =1. NETA Level 2 technicians must demonstrate basic math skills for interpreting diagrams, test plots, and graphical data.
NEW QUESTION # 66
A tagout device must be able to withstand a minimum pull force of:
- A. 50 lb
- B. 75 lb
- C. 25 lb
- D. 30 lb
Answer: A
Explanation:
Tagout devices are required to be durable enough to remain attached and legible under typical industrial conditions. A common OSHA-based minimum strength requirement cited in training and field practice is that tagout devices must withstand at least50 pounds of forceto prevent accidental detachment or removal.
NETA Level 2 objectives reinforce that LOTO is not paperwork-it is a physical hazard control program.
Tags must be secured using non-reusable, self-locking means such as a nylon cable tie that meets strength requirements. If a tag can be easily pulled off, it fails as a control measure and increases the likelihood of unauthorized operation.
Even though tagout does not physically prevent operation like lockout, it still must provide reliable warning and procedural control. Ensuring tag integrity is part of the technician's responsibility when applying or verifying hazardous energy control practices before testing or commissioning.
NEW QUESTION # 67
Writethree thousand forty-eight ten-thousandthsin decimal form.
- A. 0.0348
- B. 3.048
- C. 0.3048
- D. 30.48
Answer: C
Explanation:
Ten-thousandths represent four decimal places. Three thousand forty-eight ten-thousandths equals:
3048 ÷ 10,000 =0.3048
NETA Level 2 technicians must be comfortable with decimal placement and numerical interpretation because testing instruments frequently display values in decimal form. Misplacing a decimal point can lead to serious errors when evaluating resistance, voltage, current, or insulation values.
NEW QUESTION # 68
When measuring voltage using a multirange voltmeter, which range should be selectedfirst?
- A. The mid-scale range
- B. The lowest range
- C. The highest range
- D. The expected nominal range
Answer: C
Explanation:
Best practice dictates starting on thehighest voltage rangeto protect the instrument and the user from unexpected overvoltage conditions. Once the approximate voltage is known, the range can be reduced to improve measurement resolution. This practice is fundamental to safe testing and is expected knowledge for NETA Level 2 technicians working around energized systems.
NEW QUESTION # 69
A1500:5 multi-ratio CTproduces400 Vat the1200:5 tapduring saturation testing. What voltage is expected at the1500:5 tap?
- A. 500 V
- B. 400 V
- C. 480 V
- D. 320 V
Answer: A
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 # 70
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?
- A. ±4%
- B. ±2.5%
- C. ±1%
- D. ±0.25%
Answer: B
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 # 71
A delta-connected load has aphase impedance of 12 #and is supplied from a480 V line-to-line source. What is theline current?
- A. 40.0 A
- B. 27.7 A
- C. 23.1 A
- D. 69.3 A
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 # 72
In which three-phase configuration areline current and phase current equal?
- A. Delta
- B. Corner-grounded delta
- C. Wye
- D. Open-delta
Answer: C
Explanation:
In awye (star)connection, line current equals phase current. In delta systems, line current is #3 times phase current. NETA Level 2 technicians must recognize this distinction when interpreting ammeter readings, evaluating load balance, and performing commissioning tests on three-phase systems.
NEW QUESTION # 73
Which trigonometric function is equal to theopposite side divided by the hypotenuseof a right triangle?
- A. Tangent
- B. Cosine
- C. Secant
- D. Sine
Answer: D
Explanation:
Thesineof an angle is defined as the ratio of the opposite side to the hypotenuse. Trigonometry is used in power factor analysis, phasor relationships, impedance calculations, and AC circuit analysis. NETA Level 2 technicians must understand these relationships when evaluating voltage, current, and phase angles in testing scenarios.
NEW QUESTION # 74
Which portion of an electrical transmission system experiences faultsmost frequently?
- A. Underground transmission cables
- B. Overhead lines
- C. Generating stations
- D. Substations
Answer: B
Explanation:
Overhead transmission lines experience the highest frequency of faults due to their direct exposure to environmental conditions. Wind, lightning, ice, vegetation contact, animals, and pollution all contribute to transient and permanent fault conditions on overhead conductors. Unlike underground systems, overhead lines are not shielded from weather-related events.
NETA Level 2 technicians must understand fault likelihood when interpreting protective relay operations, breaker trips, and event records. Many relay schemes are designed with reclosing logic specifically because overhead line faults are often temporary. This understanding supports proper commissioning, testing of protective devices, and evaluation of fault-clearing performance.
NEW QUESTION # 75
Duringprimary current injection testingof a low-voltage circuit breaker, the breaker trips instantaneously at
8× its long-time pickup setting, even though the instantaneous element is set to10×. What is the MOST likely cause?
- A. Improper test lead placement
- B. CT saturation
- C. Thermal memory enabled
- D. Incorrect short-time delay setting
Answer: B
Explanation:
CT saturation occurs when the CT core cannot accurately reproduce high fault currents, causing distorted secondary current. This distortion can falsely trigger the instantaneous element at a lower current than expected. NETA Level 2 technicians must recognize CT saturation as a common cause of unexpected trip behavior during primary injection testing, particularly at high multiples of pickup.
NEW QUESTION # 76
During avacuum circuit breaker bottle integrity test, which hazardous energy may be produced?
- A. X-rays
- B. Gamma radiation
- C. Ultraviolet radiation
- D. Infrared radiation
Answer: A
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 # 77
ASTM D 924 is a required acceptance test for liquid-filled transformers containing natural ester insulating fluid according to NETA standards.
- A. True
- B. Only for maintenance testing
- C. Only above 69 kV
- D. False
Answer: A
Explanation:
ASTM D 924 defines test methods forpower factor and dielectric lossof insulating liquids. NETA standards require this test for acceptance testing of liquid-filled transformers, including those usingnatural ester insulating fluids.
Power factor testing evaluates the condition of the insulating liquid by identifying contamination, moisture, and deterioration. Natural ester fluids, while environmentally advantageous, still require dielectric evaluation to ensure reliability and safety.
NETA Level 2 technicians must be familiar with required acceptance tests and understand why dielectric properties are critical indicators of insulation health.
NEW QUESTION # 78
What is themaximum allowable deviationbetween resistance measurements on bolted electrical connections?
- A. 50%
- B. 10%
- C. 100%
- D. 25%
Answer: A
Explanation:
NETA standards allow a maximum deviation of50%between comparable bolted connection resistance measurements. Deviations beyond this threshold may indicate loose hardware, corrosion, contamination, or improper installation. NETA Level 2 technicians must identify abnormal readings and recommend corrective action.
NEW QUESTION # 79
Harmonics in an electrical system increase the risk of fire and electric shock.
- A. True
- B. Only when neutral conductors are undersized
- C. Only in high-voltage systems
- D. False
Answer: A
Explanation:
Harmonics cause increased heating in conductors, transformers, and neutral paths, which can degrade insulation and increase fire risk. They can also create unexpected voltage conditions and elevated touch potentials. NETA Level 2 technicians must recognize harmonic-related risks when evaluating system performance, especially in facilities with nonlinear loads such as VFDs and power electronics.
NEW QUESTION # 80
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