Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

NETA 3 > Tech Quiz > Flashcards

Tech Quiz Flashcards

1
Q

For electromagnetic field testing, additional detailed spot measurements should be taken directly at floor level
and at _______ above the floor at grid point locations directly on the wall surface separating measured area from
suspected magnetic field source

A

two meters

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Which of the following ground fault detection methods involves sensing current in only one conductor?

A

Direct method

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Before performing ground fault test on a 480V main switchboard you measure less than 1 megohm between the
neutral and ground bus. Which of the following statements is true?

A

The reading is low and should be improved before testing the ground fault protection.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

According to ANSI/NETA MTS, how often should ground systems be electrically tested assuming a multiplier of
1.0?

A

Once every two years

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

A new 35kV Step Voltage Regulator is being acceptance tested, which test would be optional for an insulating
liquid analysis on fluid sampled from the main tank in accordance with NETA standards?

A

Power factor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

A(n) ____ disconnecting means is required within sight of the storage battery for all ungrounded stationary
battery system conductors operating at over 60VDC

A

Readily accessible

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the minimum acceptable dielectric breakdown value for service-aged FR3 insulating liquid tested in
accordance with ASTM D1816 using a 2mm gap?

A

34kV

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is a newer SCADA system that doesn’t require cables?

A

PLCC

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the Restricted Approach Boundary for a 69kV system?

A

3 ft 6 in

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

IEEE standards recommend that batteries should undergo additional performance tests periodically. It is
recommended that the performance test interval should not be greater than ____ % of the expected service life.

A

25

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

In an RC parallel circuit, the current through the resistor and the current through the capacitor are

A

less than 90° out of phase with the resistor current lagging

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

One advantage DC type motors have over AC types is that:

A

their speed can be easily varied

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Which of the following is not considered a fiber optic connector?

A

8P8C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Aluminum lightning protection materials may be installed on or in contact with copper surfaces only when
corrosion protection and bimetallic listed connectors are used

A

False

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

F6 pressure within switchgear will generally vary from ____ psig, due to changes in ambient temperature

A

3 to 10

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

A current transformer with a current ratio of 60/1 is used with a current of 150 amperes. If an instrument with a
total impedance of 4 ohms is connected to the secondary of the transformer, the secondary voltage is?

A

10 volts

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

New installation of 350 MCM copper 15kV tape shielded 100% EPR insulated power cable requires inline splice.
To properly perform a splice on this cable which is not required:

A

Some type of conductors are required to cross splice and connect the shield on both sides

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What is the expected Maximum Trip Time (in Seconds) for a 600V, 2500A molded-case circuit breaker inverse
time test at 300% of Rated Continuous Current?

A

850

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Which of the following maintenance tests is required for a 13200-480Y/277V 2500kVA dry-type transformer?

A

excitation-current test on each phase

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Which of the following could cause ground faults in standby battery banks

A

Any of these

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

A newly installed 3-phase 4160V 200HP emergency generator was insulation resistance tested at 500VDC for one
minute. The calculated DAR value was found to be 1.5, is this value acceptable?

A

No, this generator should be tested at 1kVDC.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What is the cause of continuous increase in resistance during an insulation resistance test?

A

Capacitance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Temperature corrected winding-resistance acceptance testing values for large air-cooled transformers should
compare within ____ percent of previously obtained results.

A

1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What is the approximate expected interfacial tension of new insulating fluid?

A

40 Dynes/cm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
A coil in an AC circuit has which of the following properties?
It opposes changes in current
26
Which IEEE class of termination provides a seal to the end of the cable against the entrance of the external environment?
Class 1C
27
How would you go about testing a microprocessor relay with the 47 function that measures 120 volts phase to phase?
2 channels connected open Delta, one at 0 degrees, and the other at 60 degrees leading
28
When performing resistance tests on transformer windings, core saturation happens typically when the test current is about ____ % of rated current.
1
29
Which of the following is least important when choosing the class of surge arrester to be applied on a system:
Operating environment of arrester
30
A new 34.5kV-4160V power transformer filled with FR3 is being placed into service, what is the minimum acceptable dielectric breakdown voltage for a transformer of this voltage class when tested in accordance with ASTM D1816 (1mm gap)?
20kV
31
The equipment manufacturer should be contacted for recommendations before applying dc withstand maintenance tests to metal-enclosed interrupter switchgear rated above 15kV.
True
32
Of the different watt-hour meter adjustments, all multi-stator meters will have only one ______ .
balance adjustment
33
Which type of insulation material exhibits the lowest dielectric losses?
PE (Polyethylene)
34
The maximum displacement past the resting position that circuit breaker contacts reach during their operation is defined as:
Overtravel
35
Thyristors may also be known as:
Silicon Controlled Rectifiers
36
How is a transformer maximum fault current calculated using only its nameplate data?
Divide the secondary rated current by the impedance
37
The synchronous motor is an induction motor.
False
38
You go to an outdoor substation to test a transformer. Before beginning work, you should:
check the tank ground to ensure it is tight
39
Which type of communication-assisted distribution automation schemes are preferred for security purposes?
Schemes utilizing standard protocols like DNP or IEC 61850
40
Which of the following protection element tests would you NOT perform on a new Volts/Hertz Relay?
Determine offset
41
Which of the following tests provides the most accurate estimate of vacuum bottle life?
Magnetic atmospheric condition
42
wire that has a diameter of 162 mils has an area of _____ circular mils.
26,244 (Circular mil = A = d^2)
43
Motor turn and coil faults may be detected before they occur by using which of the following?
Surge test
44
What is the maximum acceptable value for Mineral Oil found in service-aged SF6 gas?
10 ppm
45
Which of the following insulating liquid tests is required when maintenance testing a 13.2kV-4.16kV 2000kVA transformer with natural ester fluid per NETA standards?
color
46
For network protectors, which of the following is an optional maintenance test per NETA standards?
Verify current transformer ratios
47
When performing winding resistance testing on a liquid filled transformer, what common temperature should the resistance measurement be corrected to?
75C
48
The minimum operating time of a Buchholz relay is:
0.1 s
49
Network protect trip actuator minimum pickup should be no more than:
75% of control voltage
50
Two 138 KV lines are separated by a separate line source breaker and incoming line breaker. A fault occurred at one of the transmission lines tripping the source breaker and corresponding station breaker the source breaker on the un-faulted line also tripped what is the most likely cause for tripping the un-faulted line?
Ferro Resonance thru xfmr to trip other OCB
51
What type of sensing element can measure a transformer’s hottest-spot (winding) temperature directly?
Fiber optic cable
52
Distance relay operate on the ______.
ratio of voltage and current
53
Which one of the following devices indicates a relay which operates when the impedance of the circuit changes significantly?
21
54
For vibration analysis in new AC motors, sideband magnitudes less than ____ dB from the power frequency are considered indicators of broken bars, whereas magnitudes less than ____ dB may be a warning of a developing problem per NETA standards.
40, 60
55
What is a preferred approach for implementing reconfiguration schemes in Distribution Automation Networks?
Using communication-assisted schemes with available communication channels
56
The most common redundancy protocol used today within Ethernet LANs is _____.
Spanning tree protocol (STP)
57
Which transformer would be the lowest suitable to supply a UPS not equipped with input filtering?
K-13
58
What is the maximum allowed water content in SF6 for new circuit breakers per NETA-ATS?
8.3 ppmv
59
Motor overload protection may not be shunted or cut out during the starting period if the motor being protected is nonautomatically started.
false
60
The power factor of a feeder can be measured by using:
A phase angle meter
61
The letter code of a large AC motor typically represents the:
Locked-rotor kVA per HP
62
What would a reactor placed at the end of a long transmission line be used for?
Current control
63
Which device number would be required for phase angle measurement in a fast bus transfer scheme?
25
64
In the Hazard Risk Category (HRC) system, what is the minimum performance requirement for HRC 3?
25 cal/cm2
65
In single-mode fiber optic cables, _________ occurs when the transmitting light source is not of one wavelength, and the transmission of different wavelengths of light is at different speeds within the fiber.
Chromatic dispersion
66
Speed of a DC motor is inversely proportional to:
armature voltage drop

NETA 3 (1 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions