NETA 1ST EDITION LATEST EXAM
PREP QUESTIONS AND ANSWERS
PDF 2026
▶ 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
▶ Sample valves should be flushed with at least _____ of waste liquid
before collecting a transformer liquid sample. Answer: ***one quart
▶ Underground service conductors between the terminals of service
equipment and service lateral or underground service conductors are
termed as _____ . Answer: ***Service Point Conductors
▶ In the picture below, would rated ear muffs be adequate hearing
protection? Answer: ***no
▶ In a zone-interlocked low voltage circuit breaker protection scheme, the
trip unit responsible for clearing the fault is inoperative. Which statement is
true? Answer: ***The downstream circuit breaker will trip
▶ In a purely inductive circuit, the phase angle between the voltage
waveform and current waveform will have a _____ phase shift. Answer:
***90 degrees
, ▶ The smallest particle of a substance where it still retains it's properties is
a/an______. Answer: ***molecule
▶ The breaking capacity of a circuit breaker is usually expressed in:
Answer: Amperes
▶ Only qualified workers are allowed within the Limited Approach
Boundary. Answer: ***True
***False
▶ Which of the following is not a factor in the operating speed of a relay?
Answer: ***rate of flux build up
▶ A downstream 30A fuse will always blow before an upstream 100A fuse.
Answer: ***false
▶ Which of the following ratios is equal to the ratio 8:22? Answer: ***4:11
▶ The grounded conductor is one of the two conductors through which
normal circuit current flows. Answer: ***False
▶ In an inductive circuit, the voltage waveform lags behind the current
waveform. Answer: ***False
▶ What respirator is used when there is insufficient oxygen in a confined
space or area, and where the concentration of airborne substances in
immediately dangerous to life and health? Answer: ***Air purifying
▶ What color test decal you affix to a protective device that is not suitable
for service? Answer: ***Red
▶ What is the insulation level of a cable marked MV-90/175mils? Answer:
100%
▶ What can change the voltage output of an energized transformer?
Answer: ***Load-tap-changer
▶ Shielded cables and twisted pairs are used more frequently in
communication circuits to reduce mutual coupling. Answer: ***True
PREP QUESTIONS AND ANSWERS
PDF 2026
▶ 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
▶ Sample valves should be flushed with at least _____ of waste liquid
before collecting a transformer liquid sample. Answer: ***one quart
▶ Underground service conductors between the terminals of service
equipment and service lateral or underground service conductors are
termed as _____ . Answer: ***Service Point Conductors
▶ In the picture below, would rated ear muffs be adequate hearing
protection? Answer: ***no
▶ In a zone-interlocked low voltage circuit breaker protection scheme, the
trip unit responsible for clearing the fault is inoperative. Which statement is
true? Answer: ***The downstream circuit breaker will trip
▶ In a purely inductive circuit, the phase angle between the voltage
waveform and current waveform will have a _____ phase shift. Answer:
***90 degrees
, ▶ The smallest particle of a substance where it still retains it's properties is
a/an______. Answer: ***molecule
▶ The breaking capacity of a circuit breaker is usually expressed in:
Answer: Amperes
▶ Only qualified workers are allowed within the Limited Approach
Boundary. Answer: ***True
***False
▶ Which of the following is not a factor in the operating speed of a relay?
Answer: ***rate of flux build up
▶ A downstream 30A fuse will always blow before an upstream 100A fuse.
Answer: ***false
▶ Which of the following ratios is equal to the ratio 8:22? Answer: ***4:11
▶ The grounded conductor is one of the two conductors through which
normal circuit current flows. Answer: ***False
▶ In an inductive circuit, the voltage waveform lags behind the current
waveform. Answer: ***False
▶ What respirator is used when there is insufficient oxygen in a confined
space or area, and where the concentration of airborne substances in
immediately dangerous to life and health? Answer: ***Air purifying
▶ What color test decal you affix to a protective device that is not suitable
for service? Answer: ***Red
▶ What is the insulation level of a cable marked MV-90/175mils? Answer:
100%
▶ What can change the voltage output of an energized transformer?
Answer: ***Load-tap-changer
▶ Shielded cables and twisted pairs are used more frequently in
communication circuits to reduce mutual coupling. Answer: ***True
