NETA III COMPREHENSIVE EXAMS 2025/2026 QUESTIONS
WITH ANSWERS RATED A+
✔✔A three-phase 4160-480/277V transformer rated 1000kVA with an impedance of
4.8% is connected to three individual circuits on the secondary side, each protected by
molded case circuit breakers. If Circuit 1 is rated for 1200A and Circuit 2 is rated for
1600A, what is the maximum size breaker that can be used on Circuit 3? - ✔✔1200A
✔✔Sectionalizers are used to detect and interrupt faults in overhead networks. -
✔✔False
✔✔How many harmonics can you generate using a single Doble F6150? - ✔✔20
✔✔Which is the "Can't Let Go" range of current flow? - ✔✔9-25mA
✔✔Transformers insulated with less-flammable liquids are required to have a fire point
of not less than ____°C in accordance with NFPA 70. - ✔✔300
✔✔A 21 device monitors ____ and _____. - ✔✔volts, amperes
✔✔When a capacitor is connected on the load side of a motor overload protective
device, a separate overcurrent protection device for the capacitor should be provided. -
✔✔False
✔✔Which of the following batteries is also referred as a Leclanche Battery? -
✔✔Carbon Zinc
✔✔Which of the following types of relays could require a CT secondary connected to be
wired in delta? - ✔✔xfmr differential
✔✔When monitoring for confined space entries involving a descent into atmospheres
that may be stratified, the atmospheric envelope should be tested a distance of
approximately ____ in the direction of travel and to each side. - ✔✔4 feet
✔✔Identify the optional maintenance inspection for medium- and high-voltage shielded
cable per NETA specs. - ✔✔fireproofing
✔✔When testing power factor of transformer bushings, NETA-ATS recommends
investigating power-factor and capacitance readings that vary from nameplate values.
What is the tolerance allowed? - ✔✔5%
✔✔For a ground system with fairly uniform soil and test electrodes driven at sufficient
spacing relative to the size of that ground system, what distance from the tested
, electrode should the potential electrode be placed to measure the theoretically correct
ground resistance when performing a fall-of-potential test? - ✔✔62 percent of the
distance between the current electrode and the tested electrode
✔✔59 - ✔✔Overvoltage Relay
✔✔Phase Angle Relay - ✔✔78
✔✔32 - ✔✔Directional Power Relay
✔✔Frequency Relay - ✔✔81
✔✔Unbalance Current Relay - ✔✔46
✔✔43 - ✔✔Manual Transfer Switch
✔✔67 - ✔✔AC Directional Overcurrent Relay
✔✔55 - ✔✔Power Factor Relay
✔✔Differential Relay - ✔✔87
✔✔85 - ✔✔Pilot Wire Relay
✔✔Synch Check Relay Number - ✔✔25
✔✔Directional Power - ✔✔32
✔✔Loss of Field - ✔✔40
start to lose potential
✔✔current balance relay - ✔✔46
✔✔voltage balance relay - ✔✔47
✔✔Temperature relay device number - ✔✔49
✔✔instantaneous relay device - ✔✔50
✔✔time overcurrent - ✔✔51
✔✔power factor relay number - ✔✔55
WITH ANSWERS RATED A+
✔✔A three-phase 4160-480/277V transformer rated 1000kVA with an impedance of
4.8% is connected to three individual circuits on the secondary side, each protected by
molded case circuit breakers. If Circuit 1 is rated for 1200A and Circuit 2 is rated for
1600A, what is the maximum size breaker that can be used on Circuit 3? - ✔✔1200A
✔✔Sectionalizers are used to detect and interrupt faults in overhead networks. -
✔✔False
✔✔How many harmonics can you generate using a single Doble F6150? - ✔✔20
✔✔Which is the "Can't Let Go" range of current flow? - ✔✔9-25mA
✔✔Transformers insulated with less-flammable liquids are required to have a fire point
of not less than ____°C in accordance with NFPA 70. - ✔✔300
✔✔A 21 device monitors ____ and _____. - ✔✔volts, amperes
✔✔When a capacitor is connected on the load side of a motor overload protective
device, a separate overcurrent protection device for the capacitor should be provided. -
✔✔False
✔✔Which of the following batteries is also referred as a Leclanche Battery? -
✔✔Carbon Zinc
✔✔Which of the following types of relays could require a CT secondary connected to be
wired in delta? - ✔✔xfmr differential
✔✔When monitoring for confined space entries involving a descent into atmospheres
that may be stratified, the atmospheric envelope should be tested a distance of
approximately ____ in the direction of travel and to each side. - ✔✔4 feet
✔✔Identify the optional maintenance inspection for medium- and high-voltage shielded
cable per NETA specs. - ✔✔fireproofing
✔✔When testing power factor of transformer bushings, NETA-ATS recommends
investigating power-factor and capacitance readings that vary from nameplate values.
What is the tolerance allowed? - ✔✔5%
✔✔For a ground system with fairly uniform soil and test electrodes driven at sufficient
spacing relative to the size of that ground system, what distance from the tested
, electrode should the potential electrode be placed to measure the theoretically correct
ground resistance when performing a fall-of-potential test? - ✔✔62 percent of the
distance between the current electrode and the tested electrode
✔✔59 - ✔✔Overvoltage Relay
✔✔Phase Angle Relay - ✔✔78
✔✔32 - ✔✔Directional Power Relay
✔✔Frequency Relay - ✔✔81
✔✔Unbalance Current Relay - ✔✔46
✔✔43 - ✔✔Manual Transfer Switch
✔✔67 - ✔✔AC Directional Overcurrent Relay
✔✔55 - ✔✔Power Factor Relay
✔✔Differential Relay - ✔✔87
✔✔85 - ✔✔Pilot Wire Relay
✔✔Synch Check Relay Number - ✔✔25
✔✔Directional Power - ✔✔32
✔✔Loss of Field - ✔✔40
start to lose potential
✔✔current balance relay - ✔✔46
✔✔voltage balance relay - ✔✔47
✔✔Temperature relay device number - ✔✔49
✔✔instantaneous relay device - ✔✔50
✔✔time overcurrent - ✔✔51
✔✔power factor relay number - ✔✔55
