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Question 1 of 100
1. Question
A microgrid __________
Question 2 of 100
2. Question
Microgrids can help enable renewable energy by managing intermittency.
Question 3 of 100
3. Question
Which factor is not driving demand and affecting microgrid market development?
Question 4 of 100
4. Question
Which of these inverters can be used in a grid-connected and islanded mode?
Question 5 of 100
5. Question
Combined heat and power systems
Question 6 of 100
6. Question
Other sources of electrical generation technologies for microgrids include
Question 7 of 100
7. Question
Which of the following will an inverter/charger not do?
Question 8 of 100
8. Question
Name the smallest component of an electrochemical energy storage system (battery) that stores chemical energy.
Question 9 of 100
9. Question
Which of the following is not a common battery chemistry?
Question 10 of 100
10. Question
The positive plate during discharge is the:
Question 11 of 100
11. Question
The available discharge rate of a battery decreases over time.
Question 12 of 100
12. Question
Which of the following is not a type of distributed generation of electricity?
Question 13 of 100
13. Question
In order for batteries to be disposed of properly, special precautions must be taken based on the battery chemistry.
Question 14 of 100
14. Question
In PV string calculations __________
Question 15 of 100
15. Question
A microinverter typically connects to
Question 16 of 100
16. Question
A battery array is constructed of 144 series modules of 48 parallel LiCoO2 cells (18650s) with a system nominal voltage of 532 Vdc and system nominal capacity 124.8 AH. Calculate the nominal voltage of each cell.
Question 17 of 100
17. Question
A battery array is constructed of 144 series modules of 48 parallel LiCoO2 cells (18650s) with a system nominal voltage 532 Vdc and system nominal capacity 124.8 AH. Calculate total energy capacity of the array.
Question 18 of 100
18. Question
How much time will a lithium-ion battery array take to discharge at 5C?
Question 19 of 100
19. Question
The purpose of wet cell electrolyte testing is to
Question 20 of 100
20. Question
For dc circuits, as voltage increases, it is necessary to _____________ in series.
Question 21 of 100
21. Question
Direct current (dc) is more difficult to interrupt at high voltages and currents than alternating current (ac).
Question 22 of 100
22. Question
The best way to remove power from an ESS system is:
Question 23 of 100
23. Question
Placing batteries with open terminals can pose great shock and arc hazards should any metal such as covers, tools, ladders, etc. short one or multiple batteries.
Question 24 of 100
24. Question
Which of the following are hazards associated with moving batteries?
Question 25 of 100
25. Question
When unpacking batteries:
Question 26 of 100
26. Question
IEE 1187-2013 states that if the manufacturer has not provided sufficient information one should:
Question 27 of 100
27. Question
Battery enclosure and rack component requirements are determined by
Question 28 of 100
28. Question
Which of the following is not common to a battery enclosure?
Question 29 of 100
29. Question
An electrolyte spill kit includes
Question 30 of 100
30. Question
A battery enclosure is often used when
Question 31 of 100
31. Question
If a battery is difficult to maneuver, it is acceptable to use its posts to increase leverage.
Question 32 of 100
32. Question
Which of the following are concerns that need to be addressed when staging batteries on a job site?
Question 33 of 100
33. Question
When racking batteries in relationship to a construction MOP, one should always consider:
Question 34 of 100
34. Question
When installing batteries in a rack, cells/batteries should be arranged so that the first and last (most positive and negative) batteries of a string are located on the same end of the rack.
Question 35 of 100
35. Question
This image is an example of a:
Question 36 of 100
36. Question
Name the smallest component of an electrochemical energy storage system (ESS) that stores chemical energy.
Question 37 of 100
37. Question
IEEE installation procedures state that as cells are installed one should:
Question 38 of 100
38. Question
What can be done to reduce the exposure to shock when working on 12-volt batteries connected in a string producing a total of 480 volts?
Question 39 of 100
39. Question
The number and thickness of connectors is a function of
Question 40 of 100
40. Question
A good material for cleaning lead-acid battery terminals that have corroded is:
Question 41 of 100
41. Question
The greatest risk from an improper connection is:
Question 42 of 100
42. Question
Battery connectors are sized for:
Question 43 of 100
43. Question
When checking polarity and measuring voltage of each cell installed in a rack, it is important to:
Question 44 of 100
44. Question
It is the _______ responsibility to make sure that the lugs/terminals within the equipment being ordered is approved for the type of cable intended for the installation.
Question 45 of 100
45. Question
As the length of wire in a dc circuit increases the voltage __________.
Question 46 of 100
46. Question
The series connections of battery modules require an increase in conductor size.
Question 47 of 100
47. Question
2020 NEC 706.15 Disconnecting Means states that for energy storage systems:
Question 48 of 100
48. Question
The ampacity of the feeder circuit conductors from the ESS to the wiring system, serving the loads to be serviced by the system, shall not be less than the greater of the:
Question 49 of 100
49. Question
Where ESS input and output terminals are more than 1.5 m (5 ft) from a connected OCPD or where the circuits from these terminals pass through a wall or partition, overcurrent protection shall be provided ____________________.
Question 50 of 100
50. Question
Electrical interference to control wiring in a BMS can be
Question 51 of 100
51. Question
CAN bus and Modbus are examples of
Question 52 of 100
52. Question
What has a practical working limit of 100m?
Question 53 of 100
53. Question
Which of the following is true?
Question 54 of 100
54. Question
Which of the following must be bonded together and connected to ground to enhance the safety of an electrical installation?
Question 55 of 100
55. Question
The purpose of grounding and bonding is to construct _________.
Question 56 of 100
56. Question
Section 250.4(A)(5) Effective Ground-Fault Current Path of the NEC states that:
Question 57 of 100
57. Question
Grounding in a three-wire dc system occurs from the
Question 58 of 100
58. Question
A dc system bonding jumper
Question 59 of 100
59. Question
Under what circumstances will a BMS issue a “battery cannot accept charge” or “battery cannot deliver charge” signal to the inverter.
Question 60 of 100
60. Question
Which of the following protects the microgrid’s systems health and local operational specifications?
Question 61 of 100
61. Question
Managing charge and discharge is accomplished by a BMS through monitoring key variables and activating input signals based on them.
Question 62 of 100
62. Question
PC-based site control systems often use a network switch and which type of cabling between devices?
Question 63 of 100
63. Question
Considering the installation of ESSs, which of the following takes precedence in the hierarchy?
Question 64 of 100
64. Question
Which of the following covers safety for ESSs installations?
Question 65 of 100
65. Question
Electrical safety during an ESS installation is addressed by:
Question 66 of 100
66. Question
Which of the following is not part of an Energy Management System?
Question 67 of 100
67. Question
Workspace requirements for a battery installation are prescribed by:
Question 68 of 100
68. Question
Which of the following may cause thermal runaway in a Li-ion battery?
Question 69 of 100
69. Question
What is a physical hazard for vented lead acid?
Question 70 of 100
70. Question
Electrolyte danger associated with lead-acid batteries is primarily caused by spills. These can occur when:
Question 71 of 100
71. Question
Which of the following is an electrical hazard associated with battery energy storage systems?
Question 72 of 100
72. Question
Which of the following poses a chemical hazard in lead acid batteries?
Question 73 of 100
73. Question
Overvoltage of Li-ion batteries may
Question 74 of 100
74. Question
Passive ventilation can be used, but is not always sufficient, for vented (flooded) batteries that discharge hydrogen.
Question 75 of 100
75. Question
The safety diamond represents:
Question 76 of 100
76. Question
Lithium chemistry has a low voltage threshold at around _________ volts per cell, typically.
Question 77 of 100
77. Question
When working on lead-acid batteries or with acids, which of the following is required first aid and emergency equipment?
Question 78 of 100
78. Question
Which of the following is not PPE required for handling and racking lead-acid, wet-cell batteries?
Question 79 of 100
79. Question
Chemical PPE is required when racking AGM batteries
Question 80 of 100
80. Question
Some activities require PPE rated for both arc flash and chemical exposure
Question 81 of 100
81. Question
Justifications for work involving electrical hazards include:
Question 82 of 100
82. Question
When no OCPD is in place or the fault clearing time is unknown, the arc duration is assumed to be __________ in NFPA 70E Table 130.7(C)15(b) for dc arc flash PPE categories.
Question 83 of 100
83. Question
You are performing voltage testing of a single battery in a 480Vnom string with available fault current of 2kA, what arc-flash category PPE should you wear?
The determination of short circuit current is necessary in order to use Table 130.7(C)(15)(b) of NFPA 70E. The arcing current is calculated at ___% of the dc short-circuit value.
For large spills of concentrated sulfuric acid what may be required before a neutralizing agent is introduced?
Question 86 of 100
86. Question
What typically indicates the completion of a neutralization method?
Question 87 of 100
87. Question
When performing a job hazard analysis which of the following is not an administrative controls issue?
Question 88 of 100
88. Question
NFPA 70E, Article 320 states that a battery risk assessment shall be performed to identify:
Question 89 of 100
89. Question
Article 130.5 states that an arc flash risk assessment shall determine:
Question 90 of 100
90. Question
NFPA 70E provides the prescriptive components to meet OSHA performance-based requirements.
Question 91 of 100
91. Question
What is the LAST CHOICE when mitigating risk caused by an unsafe work environment?
Question 92 of 100
92. Question
An energized electrical work permit is not required if the battery energy storage system is properly maintained, properly installed, has doors closed and secured, and presents no evidence of pending failure.
Question 93 of 100
93. Question
The minimum acceptable PPE and precautions for thermal hazard shall include:
Question 94 of 100
94. Question
Article 130.4(F) states that a qualified person may escort an unqualified person inside RAB if AFB is considered.
Question 95 of 100
95. Question
Strict adherence to 70E RAB distances meets OSHA requirements for exposure to shock in all instances.
Question 96 of 100
96. Question
NEC 480.7(C) states that battery circuits, where exceeding ________ nominal between conductors and ground, shall have provisions to disconnect the series-strings into segments.
Question 97 of 100
97. Question
PPE is not required for electrically segmenting of a battery array.
Question 98 of 100
98. Question
The heat created in an arcing fault is determined by:
Question 99 of 100
99. Question
When are voltage rated tools required by NFPA 70E?
Question 100 of 100
100. Question
When terminating dc feeders, which end should be landed last?
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