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1. What is the standard float voltage in terms of volts-per-cell in a lead-calcium battery?
(A) 0.8-0.85
(B) 1.4-1.42
(C) 2.12-2.15
(D) 2.17-2.25 <-
3. Transition impedance is a vital design characteristic of
(A) current limiting circuit breakers
(B) transformer differential protection schemes
(C) online load tap changers <-
(D) across the line motor starters
4. The predominant standards organization covering SCADA, RTU, and DCS systems is:
(A) IEEE
(B) NEMA
(C) IEC <-
(D) ICEA
5. Which of the following statements below is true with respect to circuit breakers rated for generator protection application?
(A) Short circuit duty cycle is required to be designed for CO – 30 sec – CO
(B) Continuous current rating must be 125% of the rating of the generator
(C) Transient recovery voltage testing must be performed for generator and system source faults
(D) Design tests must demonstrate the ability to interrupt 5 full short circuit faults
6. According to the 2018 NFPA 70E which method below is valid to verify the absence of voltages with a permanently mounted type of device?
(A) There is not a method that can be used that is a permanently mounted device. Therefore the technician must use either a direct contact device or a proximity device to verify the absence of voltage
(B) A fixed device can be used if it is permanently mounted, used only for voltage detection, listed for verifying absence of voltage, must measure all phase to phase and phase to ground voltages and must be verified as operating correctly
(C) The technician can simply use the voltmeter on the gear that measures voltage phase to phase and phase to ground for all voltages. Once verified that there is absence of voltage the technician can proceed.
(D) The technician can simply use the voltmeter on the gear and measure the voltage phase to phase and once verified at zero volts, begin work
7. When performing maintenance on a 5kV class fuse interrupt switch. ANSI/NETA specifications require that the fuse resistance be measured. For a typical 200E fuse on the primary switch of a 1000 kVA, 4160V transformer, the technician would expect an approximate value of:
(A) 2000 microhms
(B) 200 microhms
(C) 20 microhms
(D) 200 millohms
8. The sampling valve for a class 1 insulating oil transformer is located at the bottom of the transformer because the specific gravity of oil is:
(A) 1.0
(B) 1.21
(C) 0.91 <-
(D) 0.65
9. A technician is testing each of the protective elements of a microprocessor-based relay on a circuit breaker. The supervisor informs the technician that the breaker does not have be re-closed every trip because:
(A) During functional testing each trip path only needs to be tested once
(B) Testing the breaker trip string is not a required test as part of the protective relay functional test plan
(C) Tripping the breaker for each protective element is unlike real world conditions
(D) The close coil may be damaged by repeated operation
10. To increase the power factor of a substation 750 kVA load that has a 0.76 PF to a PF of 0.95, which of the following capacitor banks would provide desired power factor?
(A) 200 kVAR
(B) 250 kVAR
(C) 300 kVAR
(D) 450 kVAR
11. Which of the following should be found during a visual inspection of the construction and installation of a self-cooled outdoor bus?
(A) A vapor barrier between connected indoor and outdoor bus sections
(B) A forced air rating if constant current rating is above 20, 000A
(C) Positive pressure monitor if current rating is above 20, 000A
(D) Desiccant filter if constant current rating is above 20, 000A
12. NETA MTS requires that Load flow studies performed in accordance with
(A) IEEE 242
(B) IEEE 399 <-
(C) IEEE 433
(D) IEEE 839
13. Which electrical component is a source of fault current for incident energy calculations?
(A) Variable frequency drive
(B) Synchronous motor <-
(C) Network protector
(D) Load tap changer
14. In accordance with ANSI/NETA ATS, the required insulating gas tests on an SF6 switch include moisture, dielectric breakdown, SF6 decomposition products and
(A) Air <-
(B) Interfacial tension
(C) Specific gravity
(D) Flammable gasses
15. Which of the following is LEAST likely to be implemented on a modern low-voltage motor relay?
(A) Phase short circuit
(B) RTD overtemperature
(C) Current imbalance
(D) Sync-check <-
16. In accordance with ANSI/NETA ECS, when providing as-built drawings for commission project which of the following is true as it pertains to the disposition of as-builts?
(A) One package is left at the site and one retained by the commissioning company
(B) One package is submitted to the owner/operator and one package is retained by the commissioning company
(C) One pack is left at the site and one package is submitted to the owner/operator <-
(D) One package is left at the site and one package is submitted to the engineering firm
17. Which grounding system enhancement technique is considered permanent without requiring future maintenance?
(A) Chemical electrodes
(B) Conductive cement encased rods
(C) Bentonite clay encased rods
(D) Magnesium salt soil additive
18. Network protect trip actuator minimum pickup should be no more than
(A) 55% of control voltage
(B) 75% of control voltage <-
(C) 80% of control voltage
(D) 90% of control voltage
19. Which of the following is true regarding line sectionalizers?
(A) They have high interrupting ratings
(B) They are used with circuit reclosers <-
(C) They coordinate well with fuses
(D) They are used in transmission systems
20. Which of the following is a true statement in regards to the hotline tag of a circuit breaker?
(A) Locks recloser in the open position
(B) Limits fault current <-
(C) Prevents tripping due to inrush
(D) Prevents any close command
21. A technician measuring the power loss (dBm) of a 1000’ run of multimode fiber-optic cable obtained results below the minimum signalling threshold of the receiving equipment which has been running for several years. A second test result was different but also below the signalling threshold. The most likely issue is the
(A) Fiber power meter is defective and a new meter needs to be utilized to complete the measurements
(B) Fiber termination is loose, leading to poor connection between the test light source and receiver
(C) Transmitting equipment uses a higher power light source than reported which overcomes the dBm losses
(D) Fiber power meter was never calibrated for loss on a reference cable before testing for power loss
22. While conducting harmonic measurements on a new facility, which standard would delineate the requirements?
(A) NEMA
(B) ICEA
(C) IEEE <-
(D) NFPA
23. Storage batteries used as a source of power for emergency systems shall be suitable ratng and capacity to supply and maintain the total load for a minimum period of 1 ½ hours, without the voltage applied to load falling below
(A) 85.5% of normal
(B) 87.5% of normal <-
(C) 89.5% of normal
(D) 91.5% of normal
24. Which of the following types of relays could require a CT secondary connected to be wired in delta?
(A) Overcurrent
(B) Transformer differential
(C) Loss of field
(D) Reverse power
25. Which value is closest to the typical internal resistance of a current-limiting 15kV 100E fuse?
(A) 0.5 mohm
(B) 1.00 mohm
(C) 5.00 mohm
(D) 10.0 mohm
26. The voltage rating of a surge arrester installed on an ungrounded system over 1000V shall be equal to or greater than the continuous
(A) Phase-to-neutral voltage <-
(B) Phase-to-neutral voltage plus 10%
(C) Phase-to-phase voltage
(D) Phase-to-phase voltage plus 10%
27. In order to be considered “usual” service conditions AC induction motors must operate within what percentage of rated frequency?
(A) 5% <-
(B) 7%
(C) 9%
(D) 10%
28. To change taps under load for voltage regulation, load tap changers employ a transition impedance using a
(A) Reactance or resistance?
(B) Capacitance or inductance
(C) Reluctance and conductance
(D) Admittance and susceptance
29. Arriving at a power generation facility, a technician is told that the plant has lost power. The operators state nothing has been touched but the plant is without utility power and the SCADA systems are down until the system has been reset. Looking at the main switchgear, the following relay flags on the generator breaker are lit: 81-2, 32-1, 52-BF, 27-1. What should be investigated first?
(A) 81-2
(B) 32-1 or this one???
(C) 52-BF <-
(D) 27-1
30. Which of the following describes a line sectionalizer?
(A) Interrupts distribution line faults and separates the fault section.<-
(B) Has time/current characteristics to protect distribution lines
(C) Opens after specified number of faults are detected
(D) Clears distribution line faults and recloses a specified number of times
31. For network protectors, which of the following is an optional maintenance test?
(A) Verify current transformer ratios <-
(B) Measure the minimum pickup voltage of the motor control relay
(C) Measure resistance of power fuses
(D) Calibrate network protector relays
32. When performing winding resistance testing on a liquid filled transformer, what common temperature should the resistance measurement be corrected to?
(A) 25 C
(B) 40 C
(C) 75 C <-
(D) 100 C
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NETA Level III
Originally Posted by nbernard
