NETA III TEST -
Items on the last test pooled from several techs
1. What does a bell alarm do?
2. In the diagram where is the anti pump relay located?
3. What is this device?
A) Network protector
B) mining breaker
C) chemical unit breaker
D) Metal enclosed breaker
4. On a 87 diff relay, the tap screw was found to be loose but tripped. What would cause it to be come loose?
5. For DLRO, which is acceptable results?
A)151,128,98
B)130,101,154
C) 157, 230, 168
D) 68,84,98
6. Given a circuit breaker schematic what happens after the 51 element trips?
A) Trip coil energizes and opens the breaker
B) 86-1 contacts close
C) 86-1 and 86-2 relay operates
D) 86-1 relay operates
E) 86-2 relay operates
7. What is the Resistance from A to B?
A) 31 ohms
B) 40 ohms
C) 30.25 ohms
D) 60 ohms
8. What is not tested for an Adjustable Speed Drive System?
A) Overload relay elements by injecting primary current through the overload circuit and monitoring trip time of the overload
B) Primary inject the breaker
C) Perform operational test by initiating the control devices
D) Perform resistance measurements through bolted connections
E) Perform dielectric withstand voltage test
9. Select all that apply from the following, which are fiber optic connectors?
A) RJ45
B) 8P8C
C) TYPE G
D) ST
E) MT-RJ
F) SC
10. With a 45 degree angle and apparent power of 500, what is you real power?
11. What is the temperature difference that would show a possible deficiency and warrant an investigation?
A) 40 c <
B) 1-10 c
C) 21-40 c
D) 11-20 c
12. Temperature corrected winding-resistance values should compare within _______ of
previously obtained results.
A) 1%
B) 3%
C) 5%
D) 10%
13. How to properly test winding insulation high to low?
A) guard ground
B) test high to low and then low to ground subtracting the result
C) high to low with ground unguarded
D) test high to low at the lower kv rating with ground guarded
14. For microprocessor to laptops, which are the most common problem?
A. Baud rate
B. wrong cable
C. Com port
D. Technicians fault
E. Fiber connection is cracked
15. At what voltage is it safe to wear cotton clothing?
A) 50-150
B) Less than 50
C) 151-750
D) 75-120
16. What is the restricted approach boundary for 13,800V ?
A) 1ft 6 inches
B) 2ft 2 inches
C) 3 ft
D) 6 ft
17. How is the ups synced to the output V
A) Incoming source
B) Not determined
C) Emergency generator
D) Bypass source
18. For silicone insulating liquid, what is not tested?
A) Dielectric breakdown
B) Viscosity
C) Interfacial tension
D) Neutralization number
19. An alternator containing eight poles per phase is turning at 1500 RPM. What is the output frequency?
20. Three capacitors, a 12 µF, a 20 µF, and a 30 µF, are connected in parallel to a 60 Hz source. The total XC is?
21. If a breaker is timing at 10 cycles slower than nameplate and 2nd time it is 4 cycles slower, what is the best course of action next?
A. Operate till it falls within tolerance
B. Spray lube on the bearings
C. Use penetrating lube on the bearings
D. Breaker needs to be marked bad and removed from service
22. If the current flowing in an operating circuit must be approximately measured without interrupting the current, which of the following through type current transformers would you recommend?
A) Bar
B) Split core
C) Wound
D) Window
24. 23. If a = (5, -12), what is the magnitude and direction of a?
25. Which of the following protection element tests would you most likely NOT perform on a 21 device?
A) Maximum reach
B) Maximum torque angle and direction
C) Offset
D) Overcurrent pickup
26. When arcing occurs in SF6 , what is one hazardous byproduct?
A) Sulfur Hexafluoride
B) Hydrogen sulfide
C) Hydrogen fluoride
D) Metal Fluoride
27. What is the theoretical maximum symmetrical fault current that would be available at the secondary terminals of a 3-phase 12,470-480Y/277V, 1000kVA, 7% impedance transformer:
a. 19,246 amperes
b. 1,429 amperes
c. 17,184 amperes
d. 741 amperes
e. 12,077 amperes
28. What causes a white substance to form on terminals?
29. Feeder breakers in a hospital with a 3000A 480V service that serves critical care have to have?
A) Ground fault
B) shunt trip
C) zone interlock
D) transfer schem
30. An ATS does not transfer from utility to generator. The generator is running and producing voltage. Which of the following is the cause of it not transferring?
A) The breaker feeding the ATS did not open
B) battery does not have enough charge to operate the ATS
C) Frequency of the generator is too low
D) Service only lost one phase
31. What device uses controls for transients for capacitor switching?
32. Given a magnitude of 15 @ 30 degrees multiplied by magnitude 20 @ 60 degrees?
33. R rated fuses are used for:
A- Overload for motors
B- Overload for XFMRS
C- Protection for motors
D- Protection for XFMRS
34. 4/0 grounded cable is rated at 43kA for 15cycles. What is the minimum number of cables per phase required to safely ground a 2500kVA 5.75%Z transformer on the 480V side
A-1
B-2
C-3
D-4
36. A utility defines their horizontal bus at the customer point as ABC left to right facing the customer with ABC rotation. The customer defines their buses as ABC left to right facing the utility but with CBA rotation. For a first-time connection the customer has to:
A) Swap rotation at the relay to CBA
B) Do nothing
C) Swap A and B
D) Swap cables at the customer bus to CBA
37. An alternator containing eight poles per phase is turning at 1500 RPM. What is the output frequency?
38. Which statement is correct about I2T on/off settings?
A: Swap A & B phases and leave phase sequence alone
B: Swap B & C phases and leave phase sequence alone
C: Leave phasing alone and change phase sequence to ABC
D: leave phasing and phase sequence alone
39. With a nominal system voltage of 50-150 V, what is the restrictive approach boundary?
A) 1ft
B) 2ft
C) Avoid contact
D) Not specified
40. What is the best way to test a removable temperature sensor on a transformer?
A) Meter and loop check
B) Meter and thermocouple tester
C) Heater and Meter
D) IR camera
41. Best type of motor to use if it is going to be speed controlled?
A) Shunt
B) Induction
C) Series
D) Compound
42. On a surge arrestor lead cable, what is needed in order to reduce impedance?
A) short cable no bends
B) short cable with small loops
C) short cable with big loops
D) avoid sharp bends
43. Which oil test do you perform on HV oil switch?
A) DGA
B) IFT
C) Di-electric strength
D) water content
44. What is the limited approach boundary for 35KV switchgear?
A) 5 ft
B) 6 ft
C) 8 ft
D)10 ft
45. Winding results on a motor indicate possible degradation when the output waveforms show:
A) Winding waveform symmetry
B) Noticeable difference in winding waveforms
C) Chopped waveforms on grounded windings
D) Chopped waveforms on phase ungrounded windings
46. Undervoltage protection for a UPS should:
A) Inhibit the ATS
B) Open the AC input breaker
C) Start the gen
D) Open the inverter input breaker
47. What would cause a generator to trip on 32R?
A) voltage higher than the utility
B) voltage lower than the utility
C) phase reversal
D) overcurrent
48. A CT supplies multiple devices. To confirm which devices are connected to it, the output of a single phase 5A source is connected to the X1 terminal of the CT without removing the existing wiring. The expected current at each correctly connected device would be:
A) Measurable but small because most of the 5A test current would return to ground through the CT winding
B) Unmeasurable, because the CT winding would short the test current source
C) Between 1A and 4A with the balance of 5A returning through the CT
D) 4A to 5A, because the CT winding impedance is much higher than the connected load impedance
49. Which of the following statements is true pertaining to network protectors?
A) There is no separate source of control power
B) They use a low voltage contactor
C) There are multiple external sources of control power
D) They use a medium voltage contactor
50. What is an application for a circuit switcher with a pre-insertion inductor?
A) Transient control w/ high fault currents
B) Transient control for capacitor bank switching
C) Current damping at 12.4kV
D) Current damping above 34.5kV
Originally Posted by cbrazzil
