1 | Page
NETA 3 EXAM QUESTIONS AND
ANSWERS 2025
Liquid-filled transformer bushing hot-collar acceptance test
values that exceed____ watts should be investigated per NETA
ATS - correct answer- 0
Minimum acceptable megohm value for metal-oxide surge
arrester rated 15kv with Mcov rating 12.7kv - correct answer-
5000
ASTM D877 dielectric breakdown test, the electrode gap
seperation is fixed at - correct answer- 2.5mm
Maximum allowed combined frequency variation from
nameplate for AC induction motors? - correct answer- 10%
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 95 kV - correct answer- 39
VDC
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Medium voltage switchgear electrical testing and maintenance
Every ____ months for high reliability requirement in good
condition - correct answer- 18
Wound-rotor induction motor Known for ____ starting torque,
and ___ starting current. - correct answer- High Low
Capacitance x load resistance - correct answer- Time constant
Average operating time of Buchholz relay - correct answer- .2
seconds
Maximum deviation between fuse resistances allowable -
correct answer- 15%
ASTM___ test method measures the water content in SF6 gas
- correct answer- 2029
Maximum size conductor That can be terminated using a 200A
load break elbow - correct answer- 250
NETA 3 EXAM QUESTIONS AND
ANSWERS 2025
Liquid-filled transformer bushing hot-collar acceptance test
values that exceed____ watts should be investigated per NETA
ATS - correct answer- 0
Minimum acceptable megohm value for metal-oxide surge
arrester rated 15kv with Mcov rating 12.7kv - correct answer-
5000
ASTM D877 dielectric breakdown test, the electrode gap
seperation is fixed at - correct answer- 2.5mm
Maximum allowed combined frequency variation from
nameplate for AC induction motors? - correct answer- 10%
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 95 kV - correct answer- 39
VDC
, 2 | Page
Medium voltage switchgear electrical testing and maintenance
Every ____ months for high reliability requirement in good
condition - correct answer- 18
Wound-rotor induction motor Known for ____ starting torque,
and ___ starting current. - correct answer- High Low
Capacitance x load resistance - correct answer- Time constant
Average operating time of Buchholz relay - correct answer- .2
seconds
Maximum deviation between fuse resistances allowable -
correct answer- 15%
ASTM___ test method measures the water content in SF6 gas
- correct answer- 2029
Maximum size conductor That can be terminated using a 200A
load break elbow - correct answer- 250
