NETA 1ST EDITION PRACTICE EXAM
QUESTIONS AND DETAILED
SOLUTIONS 2026
▶ What is meant by a "dead tank breaker?" Answer: The external tank is
grounded.
▶ If you have your ground conductor running through your zero-sequence
CT with your current carrying conductors, what will happen? Answer:
Ground fault protection won't function
▶ Which of the following would best describe a 52 device: Answer: AC
circuit breaker
▶ A series circuit has two resistors. The resistors dissipate 10 W and 15 W.
What is the total power dissipation of the circuit? Answer: 25 W
▶ Which of the following would be the best choice for use in both the
conductive and mechanical areas of circuit breakers and switches?
Answer: Mobil 28
▶ What is the power factor temperature correction value for new mineral
oil? Answer: ***&20C/40C
▶ OSHA requires the testing of a volt meter after a voltage test on voltage
above ______. Answer: 600V
▶ A tagout device must be strong enough to remain attached under a
minimum of ____ lbs of force. Answer: 50
▶ A piece of wire that is 0.001 inches in diameter and 12 inches long is one
mil-foot. Answer: True
▶ At least 2 entrances of sufficient area must be provided giving access to
the electrical equipment working space. Answer: ***&True
,▶ What is the Restricted Approach Boundary for a 69kV system? Answer:
***&3 ft 10 in.
▶ Which portion of the transmission system experiences faults occur most
frequently? Answer: Overhead lines
▶ To reverse the direction of rotation of a three-phase motor, reverse:
Answer: any two leads
▶ When can an unqualified person enter the Limited Approach Space?
Answer: ***&They are never allowed within the Limited Approach space
▶ Cells are connected in series to increase: Answer: ***Voltage rating
▶ The three-phase connection in which one end of each of the windings
are connected together is called the _____ connection. Answer: ***delta
▶ What is the recommended minimum insulation-resistance value for
motor windings made before 1970? Answer: ***100 Megohms per kV + 1
▶ A digital multimeter, when set to read voltage, has an input impedance of
Answer: ***a fixed, high impedance regardless of range
▶ Class 00 rubber insulating gloves are proof tested at 2,500 VAC, what
color label would you expect to find on these gloves? Answer: ***White
▶ Write three thousand fortyeight tenthousandths in decimal form. Answer:
***0.3048
▶ What is the primary purpose of the National Electrical Code? Answer:
***The practical safeguarding of persons and property from electrical
hazards.
▶ Each switchboard used as service equipment should be provided with a
main bonding jumper. Answer: ***True
▶ Harmonics increase the risk of fire and electric shock. Answer: ***True
, ▶ The ________ section of a switchboard receives power from the service
section and feeds it to various downstream loads. Answer: ***distribution
▶ Three inductors of 60mH, 120mH and 75mH respectively, are connected
together in a parallel combination with no mutual inductance between them.
Calculate the total inductance of the parallel combination in millihenries.
Answer: ***26 mH
▶ What is the distance between points (3, 5) and (4, 5) on the rectangular
coordinate grid? Answer: ***1
▶ Which of the following sets of terminals would you expect to find on a
DLRO? Answer: ***C1, P1, C2, P2
▶ Determine the RMS amplitude of this sinusoidal waveform, as displayed
by an oscilloscope with a vertical sensitivity of 0.2 volts per division:
Answer: ***0.32
▶ The dataplate on a condenser bushing shows values for C2. What do
these represent? Answer: ***The power factor and capacitance that should
be measured between the tap and the ground flange
▶ What does the I represent on a circuit breaker which has a solid state
LSIG trip device? Answer: ***Instantaneous
▶ The main advantage of aluminum bus bar is: Answer: ***low cost
▶ Shown below is a current transformer with the number of turns between
taps. What is the calculated voltage for taps X1 to X3 when 200 V is
applied to the full secondary winding (X1 to X5)? Answer: ***60V
▶ Using the diagram shown, what is the total circuit resistance? Answer:
***10 ohms
▶ A given transformer has insulating fluid with a specific gravity greater
than 1, from where would you draw a sample? Answer: top
▶ For a DAR test of a transformer, the reading at 1 minute is divided by a
reading at: Answer: ***60 seconds
QUESTIONS AND DETAILED
SOLUTIONS 2026
▶ What is meant by a "dead tank breaker?" Answer: The external tank is
grounded.
▶ If you have your ground conductor running through your zero-sequence
CT with your current carrying conductors, what will happen? Answer:
Ground fault protection won't function
▶ Which of the following would best describe a 52 device: Answer: AC
circuit breaker
▶ A series circuit has two resistors. The resistors dissipate 10 W and 15 W.
What is the total power dissipation of the circuit? Answer: 25 W
▶ Which of the following would be the best choice for use in both the
conductive and mechanical areas of circuit breakers and switches?
Answer: Mobil 28
▶ What is the power factor temperature correction value for new mineral
oil? Answer: ***&20C/40C
▶ OSHA requires the testing of a volt meter after a voltage test on voltage
above ______. Answer: 600V
▶ A tagout device must be strong enough to remain attached under a
minimum of ____ lbs of force. Answer: 50
▶ A piece of wire that is 0.001 inches in diameter and 12 inches long is one
mil-foot. Answer: True
▶ At least 2 entrances of sufficient area must be provided giving access to
the electrical equipment working space. Answer: ***&True
,▶ What is the Restricted Approach Boundary for a 69kV system? Answer:
***&3 ft 10 in.
▶ Which portion of the transmission system experiences faults occur most
frequently? Answer: Overhead lines
▶ To reverse the direction of rotation of a three-phase motor, reverse:
Answer: any two leads
▶ When can an unqualified person enter the Limited Approach Space?
Answer: ***&They are never allowed within the Limited Approach space
▶ Cells are connected in series to increase: Answer: ***Voltage rating
▶ The three-phase connection in which one end of each of the windings
are connected together is called the _____ connection. Answer: ***delta
▶ What is the recommended minimum insulation-resistance value for
motor windings made before 1970? Answer: ***100 Megohms per kV + 1
▶ A digital multimeter, when set to read voltage, has an input impedance of
Answer: ***a fixed, high impedance regardless of range
▶ Class 00 rubber insulating gloves are proof tested at 2,500 VAC, what
color label would you expect to find on these gloves? Answer: ***White
▶ Write three thousand fortyeight tenthousandths in decimal form. Answer:
***0.3048
▶ What is the primary purpose of the National Electrical Code? Answer:
***The practical safeguarding of persons and property from electrical
hazards.
▶ Each switchboard used as service equipment should be provided with a
main bonding jumper. Answer: ***True
▶ Harmonics increase the risk of fire and electric shock. Answer: ***True
, ▶ The ________ section of a switchboard receives power from the service
section and feeds it to various downstream loads. Answer: ***distribution
▶ Three inductors of 60mH, 120mH and 75mH respectively, are connected
together in a parallel combination with no mutual inductance between them.
Calculate the total inductance of the parallel combination in millihenries.
Answer: ***26 mH
▶ What is the distance between points (3, 5) and (4, 5) on the rectangular
coordinate grid? Answer: ***1
▶ Which of the following sets of terminals would you expect to find on a
DLRO? Answer: ***C1, P1, C2, P2
▶ Determine the RMS amplitude of this sinusoidal waveform, as displayed
by an oscilloscope with a vertical sensitivity of 0.2 volts per division:
Answer: ***0.32
▶ The dataplate on a condenser bushing shows values for C2. What do
these represent? Answer: ***The power factor and capacitance that should
be measured between the tap and the ground flange
▶ What does the I represent on a circuit breaker which has a solid state
LSIG trip device? Answer: ***Instantaneous
▶ The main advantage of aluminum bus bar is: Answer: ***low cost
▶ Shown below is a current transformer with the number of turns between
taps. What is the calculated voltage for taps X1 to X3 when 200 V is
applied to the full secondary winding (X1 to X5)? Answer: ***60V
▶ Using the diagram shown, what is the total circuit resistance? Answer:
***10 ohms
▶ A given transformer has insulating fluid with a specific gravity greater
than 1, from where would you draw a sample? Answer: top
▶ For a DAR test of a transformer, the reading at 1 minute is divided by a
reading at: Answer: ***60 seconds
