NETA 3 exam 1 Questions with Correct
Answers
At what voltage level are secondary class arresters typically applied?
1000 kVA and less
The maximum overcurrent protection for 14 AWG copper conductor is?
15 Amps
How is lagging power factor improved using a synchronous motor?
Raise excitation of field winding
In most installations, capacitors cases are not required to be connected to the equipment
grounding conductor. TRUE or FALSE
FALSE
Visual inspections or checks are not required on circuits not energized or not carrying
current at the time of an infrared survey. TRUE or FALSE
FALSE
Energy in a capacitor is stored as a(n):
Electrostatic charge
When performing resistance tests on a transformer winding, core saturation happened
typically when the test current is about ___% of rated current.
1%
Which type of test sensor is best used for detection PD in tanks filled with dielectric?
Acoustic Emission (AE) Sensor
,A relay with either a definite or inverse time characteristic that functions when the
current in the AC circuit exceed a predetermined value.
50: Instantaneous Overcurrent Relay
When multiple auxiliary rod, pip, or plate electrodes are installed for providing a
ground system, they shall no be less than ________apart.
6 feet
What is the primary danger associated with burn-out control lights in switchgear?
Its possible protective devices will not fuction
In thermal imaging systems, what is the range from the lowest temperature to the
highest on the temperature scale known as?
Dynamic Range
Fuse-holders for cartridge fuses shall be so designed that it is difficult to put a fuse of
any given class into a fuse-holder that is designed for a _____ lower or a _____ higher
than that of the class to which the fuse belongs.
current / voltage
What is the approximate sum of the following two vectors? Magnitude 10 at 120° and
magnitude 15 at 90°
magnitude 24 at 102°
OSHA 29 CFR 1910.269 states that employers shall ensure the outer layer of clothing
worn by an employee, except for clothing not required to be arc rated, is flame resistant
under certain conditions. Which of the conditions listed is incorrect?
The incident heat energy exceeds 1.2 cal/cm2 (squared)
, What is the purpose of testing the outputs from the station level in an IEC 61850
system?
To verify the operation of circuit breaker controls
The best location for installation of a surge arrester is:
At the service terminals of the equipment it is protecting
IEC 61850 does not distinguish between protection and operations information, they are
handled at the application level. TRUE or FALSE
TRUE
What is the benchmark for age measurement in a transformer based on continuous
operation at rated load?
8760 hour of load per year
Which IEEE standard covers SF6 circuit breakers?
C37.04
The most important reason secondary circuits of current transformers should never be
left open is:
Dangerous voltage could be produced
Which K-factor rating is suitable for a transformer when 100% of the load is electronic
equipment?
K-20
A capacitor has a capacitance of 100 microfarads on a 120V 60Hz line. How much
current flows through the capacitor?
Answers
At what voltage level are secondary class arresters typically applied?
1000 kVA and less
The maximum overcurrent protection for 14 AWG copper conductor is?
15 Amps
How is lagging power factor improved using a synchronous motor?
Raise excitation of field winding
In most installations, capacitors cases are not required to be connected to the equipment
grounding conductor. TRUE or FALSE
FALSE
Visual inspections or checks are not required on circuits not energized or not carrying
current at the time of an infrared survey. TRUE or FALSE
FALSE
Energy in a capacitor is stored as a(n):
Electrostatic charge
When performing resistance tests on a transformer winding, core saturation happened
typically when the test current is about ___% of rated current.
1%
Which type of test sensor is best used for detection PD in tanks filled with dielectric?
Acoustic Emission (AE) Sensor
,A relay with either a definite or inverse time characteristic that functions when the
current in the AC circuit exceed a predetermined value.
50: Instantaneous Overcurrent Relay
When multiple auxiliary rod, pip, or plate electrodes are installed for providing a
ground system, they shall no be less than ________apart.
6 feet
What is the primary danger associated with burn-out control lights in switchgear?
Its possible protective devices will not fuction
In thermal imaging systems, what is the range from the lowest temperature to the
highest on the temperature scale known as?
Dynamic Range
Fuse-holders for cartridge fuses shall be so designed that it is difficult to put a fuse of
any given class into a fuse-holder that is designed for a _____ lower or a _____ higher
than that of the class to which the fuse belongs.
current / voltage
What is the approximate sum of the following two vectors? Magnitude 10 at 120° and
magnitude 15 at 90°
magnitude 24 at 102°
OSHA 29 CFR 1910.269 states that employers shall ensure the outer layer of clothing
worn by an employee, except for clothing not required to be arc rated, is flame resistant
under certain conditions. Which of the conditions listed is incorrect?
The incident heat energy exceeds 1.2 cal/cm2 (squared)
, What is the purpose of testing the outputs from the station level in an IEC 61850
system?
To verify the operation of circuit breaker controls
The best location for installation of a surge arrester is:
At the service terminals of the equipment it is protecting
IEC 61850 does not distinguish between protection and operations information, they are
handled at the application level. TRUE or FALSE
TRUE
What is the benchmark for age measurement in a transformer based on continuous
operation at rated load?
8760 hour of load per year
Which IEEE standard covers SF6 circuit breakers?
C37.04
The most important reason secondary circuits of current transformers should never be
left open is:
Dangerous voltage could be produced
Which K-factor rating is suitable for a transformer when 100% of the load is electronic
equipment?
K-20
A capacitor has a capacitance of 100 microfarads on a 120V 60Hz line. How much
current flows through the capacitor?
