The Realest Study Materials NETA_2 Dumps Updated Mar 08, 2026
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NEW QUESTION # 52
Harmonics in an electrical system increase the risk of fire and electric shock.
- A. Only when neutral conductors are undersized
- B. True
- C. Only in high-voltage systems
- D. False
Answer: B
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 # 53
Which type of load is most commonly associated withharmonic distortion?
- A. Pure resistive loads
- B. Synchronous motors
- C. Linear inductive loads
- D. Variable frequency drives
Answer: D
Explanation:
Variable frequency drives (VFDs) are nonlinear loads that draw current in pulses, producing harmonics.
Understanding harmonic sources helps technicians evaluate heating, nuisance tripping, and power quality issues.
NEW QUESTION # 54
A battery bank consists of60 cells, each rated2 V. What is thenominal DC voltageof the battery bank?
- A. 100 V
- B. 120 V
- C. 240 V
- D. 60 V
Answer: B
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 # 55
In ANSI/IEEE device numbering, which device best corresponds toDevice 52?
- A. Differential relay
- B. AC circuit breaker
- C. Undervoltage relay
- D. Synchronizing relay
Answer: B
Explanation:
ANSI/IEEE device numbers provide a standardized way to identify protective and control functions in power systems.Device 52designates anAC circuit breaker. It is one of the most commonly referenced device numbers on one-lines, schematics, relay settings sheets, and commissioning documentation.
NETA Level 2 technicians must be comfortable identifying device numbers because testing tasks frequently reference them. For example, when verifying breaker control circuits, interlocks, trip/close coil operation, auxiliary contacts, or anti-pump circuits, drawings may refer to "52a" and "52b" auxiliary contacts (breaker position contacts). Similarly, protection schemes may call for verifying that a relay output properly operates the52 trip circuit.
Correct identification reduces errors during functional testing, secondary injection, and commissioning checks. Misinterpreting device numbers can lead to wiring mistakes, incorrect test points, or a failure to validate protective functions. Therefore, recognizing device 52 as the AC breaker is a core competency within Level 2 electrical testing fundamentals and component testing.
NEW QUESTION # 56
On a circuit breaker equipped with a solid-stateLSIGtrip unit, what does the"I"represent?
- A. Instantaneous
- B. Insulation
- C. Interrupting rating
- D. Inverse-time
Answer: A
Explanation:
LSIG stands for Long-time, Short-time, Instantaneous, and Ground-fault protection. TheInstantaneous element provides rapid tripping with no intentional delay for high-magnitude faults. NETA Level 2 technicians must understand trip unit elements when performing injection testing and verifying protective coordination.
NEW QUESTION # 57
The dataplate on a condenser bushing listsC2values. What do these values represent?
- A. Secondary winding insulation resistance
- B. Power factor and capacitance between the tap and ground flange
- C. Primary insulation capacitance to ground
- D. Total bushing capacitance under load
Answer: B
Explanation:
C2 values represent the capacitance and power factor measured between the test tap and ground flange. These values are critical for evaluating bushing condition and detecting contamination, moisture ingress, or insulation deterioration during acceptance and maintenance testing.
NEW QUESTION # 58
A 120 VAC, 60 Hz circuit supplies a 10 A load at a20° lagging power factor. What is thetrue power?
- A. 1,200 W
- B. 1,000 W
- C. 310.6 W
- D. 1,127.6 W
Answer: D
Explanation:
True power is calculated using.
Here,V,A, and.
Thus,W.
NETA Level 2 technicians must correctly distinguish apparent power from true power when evaluating loads, especially those with inductive characteristics.
NEW QUESTION # 59
Electrical equipment working space must have at least two entrances of sufficient area to permit access.
- A. False unless the room is classified as a confined space
- B. True
- C. True only above 600 V
- D. False
Answer: B
Explanation:
Working space and egress requirements exist to ensure personnel canquickly exitan area in the event of an arc flash, fire, or other emergency. Codes and safety practices commonly requiretwo means of egress(two entrances) when certain conditions are met, particularly when large equipment, high fault current, or certain room layouts increase risk and limit escape paths.
From a NETA Level 2 safety standpoint, the practical takeaway is that equipment rooms must not trap workers. Adequate working clearances and egress routes must be verified as part of safe work planning- especially during commissioning where multiple panels may be open, temporary barriers may exist, and contractors may crowd the space.
While the exact conditions and thresholds can vary by NEC article and equipment rating, the concept tested here matches the flash-card: providing at least two entrances is considered a compliant requirement for safe access to electrical equipment working space in the relevant scenario context.
NEW QUESTION # 60
Class 00 rubber insulating gloves are proof-tested at2,500 VAC. What color label would you expect to find on these gloves?
- A. Red
- B. Green
- C. Yellow
- D. White
Answer: D
Explanation:
Rubber insulating gloves are color-coded to indicate their voltage class and test rating.Class 00 gloves, rated for low-voltage work, are proof-tested at2,500 VACand are identified by awhite label.
NETA Level 2 technicians must verify glove class, test date, and physical condition before use. Using gloves of the incorrect class or expired test date creates a serious safety risk. Color identification allows quick visual verification in the field, supporting compliance with electrical safety requirements.
NEW QUESTION # 61
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 # 62
For aDielectric Absorption Ratio (DAR)test on a transformer, the 1-minute insulation resistance value is divided by the value obtained at:
- A. 60 seconds
- B. 45 seconds
- C. 30 seconds
- D. 10 minutes
Answer: C
Explanation:
The Dielectric Absorption Ratio (DAR) is defined as:
DAR = IR at 60 seconds ÷ IR at 30 seconds
This test evaluates insulation quality by observing how resistance increases as polarization effects develop.
NETA Level 2 technicians use DAR testing as a quick diagnostic tool, particularly when full polarization index (PI) testing is not practical.
NEW QUESTION # 63
Which document should be consultedfirstbefore performing any circuit breaker testing or maintenance?
- A. NETA-ATS
- B. OSHA 1910
- C. NFPA 70
- D. Manufacturer's instructions
Answer: D
Explanation:
NETA standards require technicians to followmanufacturer's instructionsfirst, as they define specific procedures, tolerances, and limitations for the equipment. NETA standards supplement-not replace- manufacturer requirements.
NEW QUESTION # 64
When applying personal protective grounds, which connection must be madefirst?
- A. Equipment end
- B. Neutral conductor end
- C. Ground source end
- D. Phase conductor end
Answer: A
Explanation:
The correct application of personal protective grounds is critical to worker safety and is strongly emphasized in NETA safety practices. When installing grounds, theequipment end must be attached first, ensuring the grounding conductor is securely bonded to earth or an effective ground source before any connection is made to energized or potentially energized conductors.
This sequence minimizes the risk of electric shock. If the phase conductor were connected first and the grounding system was not yet established, the worker could become the path to ground in the event of accidental energization. Once the equipment end is secured, phase conductors can be safely grounded.
When removing grounds, the reverse order is required: phase conductors are disconnected first, and the equipment end is removed last. NETA Level 2 technicians must follow this sequence consistently during maintenance, testing, and commissioning activities to ensure compliance with safety standards and prevent serious injury.
NEW QUESTION # 65
On an electrical schematic, adot on a current transformer symbolindicates:
- A. Burden rating
- B. Polarity
- C. Metering accuracy class
- D. Grounded side
Answer: B
Explanation:
The dot convention indicatespolarity, showing the instantaneous current direction relationship between primary and secondary windings. Correct polarity is critical for protection schemes, differential relays, and metering accuracy. NETA Level 2 technicians must verify CT polarity during installation and commissioning to ensure correct relay operation.
NEW QUESTION # 66
In azone-selective interlocking (ZSI)scheme, what condition allows an upstream breaker to tripwithout intentional delay?
- A. Loss of communication between breakers
- B. Receipt of a restraint signal from downstream breaker
- C. Short-time delay set to minimum
- D. Absence of a restraint signal during a fault
Answer: D
Explanation:
In ZSI schemes, downstream breakers send restraint signals upstream when they detect faults. Ifno restraint signal is received, the upstream breaker assumes the downstream device failed and tripswithout intentional delayto clear the fault. NETA Level 2 technicians must understand this fail-safe logic when commissioning protection systems and verifying selective coordination.
NEW QUESTION # 67
When may anunqualified personenter theLimited Approach Boundary?
- A. When the voltage is below 600 V
- B. When wearing rubber insulating gloves
- C. Never
- D. When escorted by a qualified person
Answer: C
Explanation:
The Limited Approach Boundary defines the minimum distance from exposed energized parts that unqualified persons arenever permitted to cross. Entry into this space is restricted to qualified persons who understand the hazards and are trained to apply proper protective measures.
NETA safety objectives emphasize that escorting, PPE, or voltage level does not override qualification requirements. Only qualified individuals with appropriate training and authorization may enter the Limited Approach Boundary. This rule is foundational to preventing shock injuries and is strictly enforced during testing, inspection, and commissioning activities.
NEW QUESTION # 68
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