NETA III TEST PAPER 2025/2026 QUESTIONS WITH
ANSWERS RATED A+
✔✔Which one of the following devices indicates a relay which operates when the
impedance of the circuit changes significantly?
81
51
46
21 - ✔✔46***
✔✔What is the cause of continuous increase in resistance during an insulation
resistance test?
Capacitance
Inductance
Power Factor
Dissipation Factor - ✔✔***dissipation factor
✔✔IEC 61850 process bus architecture uses merging units to collect circuit breaker
control and status signals.
True
False - ✔✔***true
✔✔If an ac voltage has a frequency of 350 hertz, how many times will the positive peak
value of voltage occur after two seconds?
120
350
700
, 1400
2800 - ✔✔***700
✔✔Analyze the circuit below. Assume that all switches are open initially and then Sw.
#1 is closed, in which state would the circuit be in?
Lamp #1 only is on.
Lamp #2 only is on.
Lamps #1, #2 and #3 are on.
Lamps #2 and #3 are on.
Lamp #1 and #3 are on. - ✔✔***lamp 1
✔✔A 21 device monitors which of the following?
Voltage magnitude
Current magnitude
Phase angle
All of the above
A & B only - ✔✔***voltage magnitude
✔✔Which of the following harmonics are additive in the neutral of a three-phase system
(zero-sequence harmonics)?
2nd, 3rd
1st, 5th
3rd, 9th
7th, 11th - ✔✔***2nd,3rd
ANSWERS RATED A+
✔✔Which one of the following devices indicates a relay which operates when the
impedance of the circuit changes significantly?
81
51
46
21 - ✔✔46***
✔✔What is the cause of continuous increase in resistance during an insulation
resistance test?
Capacitance
Inductance
Power Factor
Dissipation Factor - ✔✔***dissipation factor
✔✔IEC 61850 process bus architecture uses merging units to collect circuit breaker
control and status signals.
True
False - ✔✔***true
✔✔If an ac voltage has a frequency of 350 hertz, how many times will the positive peak
value of voltage occur after two seconds?
120
350
700
, 1400
2800 - ✔✔***700
✔✔Analyze the circuit below. Assume that all switches are open initially and then Sw.
#1 is closed, in which state would the circuit be in?
Lamp #1 only is on.
Lamp #2 only is on.
Lamps #1, #2 and #3 are on.
Lamps #2 and #3 are on.
Lamp #1 and #3 are on. - ✔✔***lamp 1
✔✔A 21 device monitors which of the following?
Voltage magnitude
Current magnitude
Phase angle
All of the above
A & B only - ✔✔***voltage magnitude
✔✔Which of the following harmonics are additive in the neutral of a three-phase system
(zero-sequence harmonics)?
2nd, 3rd
1st, 5th
3rd, 9th
7th, 11th - ✔✔***2nd,3rd
