NETA III EVALUATION EXAMS 2025/2026 QUESTIONS
WITH ANSWERS RATED A+
✔✔When performing a watt-loss test on surge arresters, multiple units can be tested in
parallel to save time instead of testing each unit individually. - ✔✔false
✔✔Temporary protective grounds should be placed to create an equipotential zone
______. - ✔✔at the work location
✔✔Which of the following characteristics has an effect on the apparent temperature as
sensed by an infrared sensing device? - ✔✔emmisivity
✔✔A given battery bank feeding a 240V UPS system has an available fault current of
5kA and a maximum arc duration of 2 seconds. According to NFPA 70E, which of the
following would be considered an acceptable Arc-Flash Boundary for this equipment? -
✔✔72 inches
NFPA 70E Table 130.7(C)
✔✔When is it not necessary to complete an energized electrical work permit? -
✔✔Voltage testing, troubleshooting, or like activities
NFPA 70E Table 130.2(B)
✔✔Busways shall be securely supported, unless otherwise designed and marked as
such, at intervals not to exceed _____ . - ✔✔5 ft.
✔✔An instantaneous trip test was performed on a set of circuit breakers with a non-
adjustable thermal-magnetic trip units during acceptance testing. The time-current curve
specifies an expected trip current range of 3200A-4000A, which of the following results
is unacceptable per NETA standards? - ✔✔A-4942, B-5092, C-4994
✔✔The major environmental factor to initiate the growth of silver whiskers is relatively
low concentration of _______ . - ✔✔Hydrogen Sulfide
✔✔Which of the following best describes the arc inside of a vacuum circuit breaker? -
✔✔metal vapor
✔✔A motor started in wye configuration will draw ____ current compared to one started
in delta configuration, given identical windings. - ✔✔less
✔✔In accordance with ANSI/NETA MTS, which of the following tests is optional for
automatic line reclosers? - ✔✔Perform a power factor test on each pole
,✔✔Which of the following is an optional insulating fluid test for new liquid-filled
transformers? - ✔✔power factor
✔✔For vibration analysis in new AC motors, sideband magnitudes less than ____ dB
from the power frequency are considered indicators of broken bars, whereas
magnitudes less than ____ dB may be a warning of a developing problem per NETA
standards. - ✔✔40, 60
✔✔Power system noise problems can be addressed by using: - ✔✔transformers
✔✔Upon completion of a 360 degree RIC Test, the inductance is higher at the end of
the test than at the beginning of the test. What is the most likely cause? - ✔✔Corrupted
data due to residual magnetism in the core
✔✔Which of the following would be used to change voltage levels in a transformer for
seasonal changes? - ✔✔de-energized no-load tap-changer
✔✔A transformer has a 240 V primary and a 120 V secondary. With a 30 ohm load
connected, what is the primary volt-amps? - ✔✔480
1. Use ohms law to find secondary current.
2. Calculate primary current based on transformer ratio.
3. Primary VA = Primary Volts x Primary Amps.
✔✔If 4000 was the specified value, and 3850 was the measured value, what is the
percent error? - ✔✔-3.750
https://www.mathsisfun.com/numbers/percentage-error.html
✔✔Which of the following statements is correct with regards to ground fault protection
for a 480V, 1200A, solidly grounded emergency system? - ✔✔An audible and visual
signal is required
✔✔In accordance with NETA and IEEE standards, the correct acceptance test voltage
(dc) for 35KV rated EPR 100% insulation level cable is? - ✔✔100kV
✔✔Which macro in Doble ProTest is used for testing the slope of a differential relay? -
✔✔PLOTII
✔✔The sensing element or setting of a motor overload device that is not sufficient to
start or carry the load of a motor marked with a service factor of 1.15 or greater shall not
exceed _____. - ✔✔140%
, ✔✔What is the NETA-MTS recommended test voltage for a 15 minute withstand test on
a single-phase, 15kV line sectionalizer with a rated impulse withstand voltage of 95kV?
- ✔✔39kVDC
✔✔If the normal electrical supply fails, legally required power must be available within
_____ per NEC. - ✔✔60 sec
✔✔Ground rods used in lightning protection systems of a large industrial facility shall
extend vertically not less than ____ into the earth. - ✔✔10 feet
✔✔Electronic equipment should be protected from transients with: - ✔✔TVSS
✔✔A relay device used for locating the fault within a protective zone of an electric
power system operates on the principle of? - ✔✔Comparison techniques
✔✔The grounding conductor should not pass through zero-sequence transformers for
ground fault protection installations. - ✔✔True
✔✔Which substance is commonly added to insulating oil to slow the rate of oxidation? -
✔✔DBPC
✔✔Which of the following insulating liquid tests is required when maintenance testing a
13.2kV-4.16kV 2000kVA transformer with natural ester fluid per NETA standards? -
✔✔Color
✔✔AC dielectric withstand maintenance test voltage of a 5kV delta-wye 500kVA dry-
type transformer should not exceed _____ percent of factory test voltage for one minute
duration. - ✔✔65 PERCENT
✔✔When performing a cable test using a Very Low Frequency test set, the unit typically
operates at ____ hertz. - ✔✔0.10
✔✔Sectionalizers have the same, more, or less interrupting capabilities as reclosers? -
✔✔Less
✔✔What component of a microprocessor power monitor is verified with the metering
comparison test? - ✔✔I/O module
✔✔Which of the following statement about SF6 gas is incorrect ? - ✔✔It has dark yellow
color
✔✔Time delay fuses are used in the protection of which of the following: - ✔✔motors
WITH ANSWERS RATED A+
✔✔When performing a watt-loss test on surge arresters, multiple units can be tested in
parallel to save time instead of testing each unit individually. - ✔✔false
✔✔Temporary protective grounds should be placed to create an equipotential zone
______. - ✔✔at the work location
✔✔Which of the following characteristics has an effect on the apparent temperature as
sensed by an infrared sensing device? - ✔✔emmisivity
✔✔A given battery bank feeding a 240V UPS system has an available fault current of
5kA and a maximum arc duration of 2 seconds. According to NFPA 70E, which of the
following would be considered an acceptable Arc-Flash Boundary for this equipment? -
✔✔72 inches
NFPA 70E Table 130.7(C)
✔✔When is it not necessary to complete an energized electrical work permit? -
✔✔Voltage testing, troubleshooting, or like activities
NFPA 70E Table 130.2(B)
✔✔Busways shall be securely supported, unless otherwise designed and marked as
such, at intervals not to exceed _____ . - ✔✔5 ft.
✔✔An instantaneous trip test was performed on a set of circuit breakers with a non-
adjustable thermal-magnetic trip units during acceptance testing. The time-current curve
specifies an expected trip current range of 3200A-4000A, which of the following results
is unacceptable per NETA standards? - ✔✔A-4942, B-5092, C-4994
✔✔The major environmental factor to initiate the growth of silver whiskers is relatively
low concentration of _______ . - ✔✔Hydrogen Sulfide
✔✔Which of the following best describes the arc inside of a vacuum circuit breaker? -
✔✔metal vapor
✔✔A motor started in wye configuration will draw ____ current compared to one started
in delta configuration, given identical windings. - ✔✔less
✔✔In accordance with ANSI/NETA MTS, which of the following tests is optional for
automatic line reclosers? - ✔✔Perform a power factor test on each pole
,✔✔Which of the following is an optional insulating fluid test for new liquid-filled
transformers? - ✔✔power factor
✔✔For vibration analysis in new AC motors, sideband magnitudes less than ____ dB
from the power frequency are considered indicators of broken bars, whereas
magnitudes less than ____ dB may be a warning of a developing problem per NETA
standards. - ✔✔40, 60
✔✔Power system noise problems can be addressed by using: - ✔✔transformers
✔✔Upon completion of a 360 degree RIC Test, the inductance is higher at the end of
the test than at the beginning of the test. What is the most likely cause? - ✔✔Corrupted
data due to residual magnetism in the core
✔✔Which of the following would be used to change voltage levels in a transformer for
seasonal changes? - ✔✔de-energized no-load tap-changer
✔✔A transformer has a 240 V primary and a 120 V secondary. With a 30 ohm load
connected, what is the primary volt-amps? - ✔✔480
1. Use ohms law to find secondary current.
2. Calculate primary current based on transformer ratio.
3. Primary VA = Primary Volts x Primary Amps.
✔✔If 4000 was the specified value, and 3850 was the measured value, what is the
percent error? - ✔✔-3.750
https://www.mathsisfun.com/numbers/percentage-error.html
✔✔Which of the following statements is correct with regards to ground fault protection
for a 480V, 1200A, solidly grounded emergency system? - ✔✔An audible and visual
signal is required
✔✔In accordance with NETA and IEEE standards, the correct acceptance test voltage
(dc) for 35KV rated EPR 100% insulation level cable is? - ✔✔100kV
✔✔Which macro in Doble ProTest is used for testing the slope of a differential relay? -
✔✔PLOTII
✔✔The sensing element or setting of a motor overload device that is not sufficient to
start or carry the load of a motor marked with a service factor of 1.15 or greater shall not
exceed _____. - ✔✔140%
, ✔✔What is the NETA-MTS recommended test voltage for a 15 minute withstand test on
a single-phase, 15kV line sectionalizer with a rated impulse withstand voltage of 95kV?
- ✔✔39kVDC
✔✔If the normal electrical supply fails, legally required power must be available within
_____ per NEC. - ✔✔60 sec
✔✔Ground rods used in lightning protection systems of a large industrial facility shall
extend vertically not less than ____ into the earth. - ✔✔10 feet
✔✔Electronic equipment should be protected from transients with: - ✔✔TVSS
✔✔A relay device used for locating the fault within a protective zone of an electric
power system operates on the principle of? - ✔✔Comparison techniques
✔✔The grounding conductor should not pass through zero-sequence transformers for
ground fault protection installations. - ✔✔True
✔✔Which substance is commonly added to insulating oil to slow the rate of oxidation? -
✔✔DBPC
✔✔Which of the following insulating liquid tests is required when maintenance testing a
13.2kV-4.16kV 2000kVA transformer with natural ester fluid per NETA standards? -
✔✔Color
✔✔AC dielectric withstand maintenance test voltage of a 5kV delta-wye 500kVA dry-
type transformer should not exceed _____ percent of factory test voltage for one minute
duration. - ✔✔65 PERCENT
✔✔When performing a cable test using a Very Low Frequency test set, the unit typically
operates at ____ hertz. - ✔✔0.10
✔✔Sectionalizers have the same, more, or less interrupting capabilities as reclosers? -
✔✔Less
✔✔What component of a microprocessor power monitor is verified with the metering
comparison test? - ✔✔I/O module
✔✔Which of the following statement about SF6 gas is incorrect ? - ✔✔It has dark yellow
color
✔✔Time delay fuses are used in the protection of which of the following: - ✔✔motors
