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Current
Review
Answered
Correct
Incorrect
Question 1 of 401
1. Question
Which of the following is not characteristic of a microgrid?
Question 2 of 401
2. Question
Microgrids can operate in both normal mode (connected to the grid) and in islanded mode (on their own).
Question 3 of 401
3. Question
A microgrid __________
Question 4 of 401
4. Question
Which of the following does a microgrid not do?
Question 5 of 401
5. Question
What mode most closely defines the microgrid’s operation in the following image?
Question 6 of 401
6. Question
Which factor is not driving demand and affecting microgrid market development?
Question 7 of 401
7. Question
What mode most closely defines the microgrid’s operation in the following image?
Question 8 of 401
8. Question
Which of the following images depicts a small remote microgrid system?
Question 9 of 401
9. Question
Microgrids can help enable renewable energy by managing intermittency.
Question 10 of 401
10. Question
Which type of microgrid is connected to a traditional utility, capable of operating in island mode, and has multiple generators and sophisticated controls?
Question 11 of 401
11. Question
Which of the following is not value added by microgrids?
Question 12 of 401
12. Question
Which type of microgrid has multiple generators, substantial distribution and sophisticated controls which enable it to be connected to a traditional utility, but also operate independently in island mode?
Question 13 of 401
13. Question
Which of the following is contributing to the expected trajectory of the microgrid market?
Question 14 of 401
14. Question
Other sources of electrical generation technologies for microgrids include
Question 15 of 401
15. Question
Microgrids are considered sustainable when their energy sources are renewable.
Question 16 of 401
16. Question
Interactive inverter power ratings are based on:
Question 17 of 401
17. Question
Smart inverters are capable of:
Question 18 of 401
18. Question
In an ac-coupled system, ______
Question 19 of 401
19. Question
Which of these inverters can be used in a grid-connected and islanded mode?
Question 20 of 401
20. Question
When installing a combined heat and power (CHP) microturbine
Question 21 of 401
21. Question
Which of the following is not an electrical output variable of a combined heat and power (CHP) microturbine?
Question 22 of 401
22. Question
Distributed generation reciprocating engines used for combined heat and power generation have a greater electrical output range than gas turbine engines.
Question 23 of 401
23. Question
Combined heat and power gas turbines:
Question 24 of 401
24. Question
Combined heat and power systems
Question 25 of 401
25. Question
The components of a typical fuel cell include an anode, cathode, and an electrolyte membrane.
Question 26 of 401
26. Question
Fuel cells can directly produce ac energy without being connected to an inverter.
Question 27 of 401
27. Question
Lead-acid batteries with thicker plates and larger acid volume are typically for:
Question 28 of 401
28. Question
Which of the following show promise for battery energy storage systems within microgrids?
Question 29 of 401
29. Question
The efficiency and output of a solar PV system is based on:
Question 30 of 401
30. Question
Which of the following will an inverter/charger not do?
Question 31 of 401
31. Question
An ESS is commonly referred to in what units?
Question 32 of 401
32. Question
Lithium ESS batteries need to have a float charge cycle.
Question 33 of 401
33. Question
List the components of a battery system from smallest to largest.
Question 34 of 401
34. Question
Name the smallest component of an electrochemical energy storage system (battery) that stores chemical energy.
Question 35 of 401
35. Question
Which of the following is the most common voltage for batteries comprising a small UPS energy storage system?
Question 36 of 401
36. Question
Which of the following is not a typical component of a battery cell?
Question 37 of 401
37. Question
State of charge is often estimated with?
Question 38 of 401
38. Question
Which of the following is not a common battery chemistry?
Question 39 of 401
39. Question
Battery specifications typically include:
Question 40 of 401
40. Question
Which of the following is not a component of a lead-acid battery?
Question 41 of 401
41. Question
To dispose of batteries properly, contacting the manufacturer is an appropriate first step.
Question 42 of 401
42. Question
The positive plate during discharge is the:
Question 43 of 401
43. Question
Batteries are rated according to?
Question 44 of 401
44. Question
An aging battery loses capacity due to:
Question 45 of 401
45. Question
The discharge rate of a battery is not affected by temperature.
Question 46 of 401
46. Question
The available discharge rate of a battery decreases over time.
Question 47 of 401
47. Question
Which of the following best describes a 0.5 C-rate (or C/2) during a discharge?
Question 48 of 401
48. Question
The percentage of battery capacity that has been discharged expressed as a percentage of maximum capacity is:
Question 49 of 401
49. Question
Deterioration, or ageing, of a battery is dependent on:
Question 50 of 401
50. Question
Which of the following is not a type of distributed generation of electricity?
Question 51 of 401
51. Question
Which of the following are alternate types of energy storage?
Question 52 of 401
52. Question
Which of the following is not a component of an ESS?
Question 53 of 401
53. Question
Stored lead-acid batteries self-discharge and may require freshening charges prior to installation if they remain in storage.
Question 54 of 401
54. Question
In order for batteries to be disposed of properly, special precautions must be taken based on the battery chemistry.
Question 55 of 401
55. Question
How much time will a lithium-ion battery array take to discharge at 5C?
Question 56 of 401
56. Question
As PV modules are wired in series and parallel voltage and current decrease.
Question 57 of 401
57. Question
Which of the following is not part the hierarchy of the components of a PV system as it is assembled?
Question 58 of 401
58. Question
In PV string calculations __________
Question 59 of 401
59. Question
In a PV system which is grid connected, which of the following is not necessary for supplying electricity to the utility company?
Question 60 of 401
60. Question
In order to mitigate solar PV variability, which of the following could be used?
Question 61 of 401
61. Question
Which type of inverter produces synchronous ac power, regulates PV array battery charging, sends excess power to the grid and can operate during grid outages?
Question 62 of 401
62. Question
A microinverter typically connects to
Question 63 of 401
63. 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 64 of 401
64. 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 capacity of each cell.
Question 65 of 401
65. 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 66 of 401
66. Question
An battery array is constructed of 144 series modules of 48 parallel LiCoO2 cells (18650s) with system nominal voltage of 532 Vdc and system nominal capacity of 124.8 AH. Calculate the current delivered at a 2C rate.
Question 67 of 401
67. Question
An expression of the present battery capacity as a percentage of maximum capacity is
Question 68 of 401
68. Question
As the internal resistance inside a battery increases, _______
Question 69 of 401
69. Question
The ratio of the density of electrolyte to the density of water is specific gravity which correlates to:
Question 70 of 401
70. Question
Tools needed to conduct wet cell electrolyte testing include
Question 71 of 401
71. Question
Equipment needed to conduct wet cell electrolyte testing includes:
Question 72 of 401
72. Question
The purpose of wet cell electrolyte testing is to
Question 73 of 401
73. Question
The battery output conductors are always terminated to the battery before the disconnect.
Question 74 of 401
74. Question
Above _________, the interrupting capability of ac equipment with double-breaking contacts (such as contactors) decreases strongly.
Question 75 of 401
75. Question
Thermal protection in a circuit breaker protects against short circuits and faults, which are drastically larger than overload.
Question 76 of 401
76. Question
In most applications, direct current has a zero-amplitude crossing opportunity to quench the arc.
Question 77 of 401
77. Question
For dc circuits, as voltage increases, it is necessary to _____________ in series.
Question 78 of 401
78. Question
DC disconnect switches, both fusible and non-fusible, share similar traits with ______ across all voltage ranges.
Question 79 of 401
79. Question
To guarantee breaking of a short-circuit in a dc system, breakers must:
Question 80 of 401
80. Question
In an ESS, the maximum current shall be the continuous inverter input current rating when the inverter is producing rated power at the _________ input voltage.
Question 81 of 401
81. Question
Direct current (dc) is more difficult to interrupt at high voltages and currents than alternating current (ac).
Question 82 of 401
82. Question
Energy storage systems and dc systems may require specialty meters to measure within ranges that are not found on regular meters
Question 83 of 401
83. Question
What is the first thing that should be done in developing an MOP for an ESS retrofit?
Question 84 of 401
84. Question
The best way to remove power from an ESS system is:
Question 85 of 401
85. Question
What is the final step prior to opening or entering ESS equipment?
Question 86 of 401
86. Question
When reinstalling batteries in an enclosure, the greatest danger is:
Question 87 of 401
87. Question
When you open the door to a battery enclosure, the most important thing to do first is:
Question 88 of 401
88. Question
After a battery enclosure door is open, dc switches have been opened, and the contactors have been confirmed open one should:
Question 89 of 401
89. Question
When removing batteries from an ESS, to minimize potential arc hazards one should:
Question 90 of 401
90. 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 91 of 401
91. Question
Single batteries, no longer in strings, do not have to be discharged to a recommended shipping voltage or SOC prior to removal and packing for disposal.
Question 92 of 401
92. Question
In a containerized ESS, once the electrical risks and voltage potentials have been brought to the minimal levels, the grounding and bonding connections can be removed prior to the removal and shipment of the container.
Question 93 of 401
93. Question
IEE 1187-2013 states that if the manufacturer has not provided sufficient information one should:
Question 94 of 401
94. Question
Prior to performing any work inside a battery enclosure, confirm _________
Question 95 of 401
95. Question
Which of the following are hazards associated with moving batteries?
Question 96 of 401
96. Question
An unapproved lubricant used when sliding batteries onto racks could deteriorate the battery enclosures causing them to eventually leak.
Question 97 of 401
97. Question
Which of the following should the inspection of batteries and the location of installation address?
Question 98 of 401
98. Question
What data is required when performing voltage testing?
Question 99 of 401
99. Question
When is it appropriate to perform individual voltage tests on a battery?
Question 100 of 401
100. Question
When unpacking batteries:
Question 101 of 401
101. Question
Acceptance testing procedures for batteries includes:
Question 102 of 401
102. Question
IEE 1187-2013 states that for acceptance testing procedures of batteries one should:
Question 103 of 401
103. Question
Spill containment is dictated by
Question 104 of 401
104. Question
A battery enclosure is often used when
Question 105 of 401
105. Question
AGM and lithium mounting racks are typically interchangeable
Question 106 of 401
106. Question
Seismic racks typically differ from non-seismic racks by incorporating
Question 107 of 401
107. Question
What is required by OSHA 29 CFR 1910.151(c) if any person is exposed to injurious corrosive materials?
Question 108 of 401
108. Question
An electrolyte spill kit includes
Question 109 of 401
109. Question
Which of the following should be utilized to determine the PPE required for a specific battery installation?
Question 110 of 401
110. Question
Which of the following should be considered when determining a method of procedure for the installation of batteries in a rack?
Question 111 of 401
111. Question
Li-ion batteries present racking risks because of
Question 112 of 401
112. Question
Which of the following is not common to a battery enclosure?
Question 113 of 401
113. Question
Seismic racks for batteries are required by:
Question 114 of 401
114. Question
According to the IEEE installation procedure, its recommendations supersede those provided by the manufacturer.
Question 115 of 401
115. Question
If you have questions concerning the overall installation of batteries, you should:
Question 116 of 401
116. Question
Battery enclosure and rack component requirements are determined by
Question 117 of 401
117. Question
When assembling a battery rack, determining access requirements, and determining placement, one should always check:
Question 118 of 401
118. Question
When determining racking and battery risks, which of the following is not common to Lead Acid/VRLA?
Question 119 of 401
119. Question
Which of the following apply to safe handling and storage of batteries?
Question 120 of 401
120. Question
Which of the following can be used to install batteries in racks or enclosures due their heavy weight?
Question 121 of 401
121. Question
If a battery is difficult to maneuver, it is acceptable to use its posts to increase leverage.
Question 122 of 401
122. Question
One should never lift or move a battery by its
Question 123 of 401
123. Question
A good way to avoid short circuits when installing batteries is to:
Question 124 of 401
124. Question
Batteries are very heavy and may require a lift table or several workers when racking them.
Question 125 of 401
125. Question
According to NEC 480.10 the minimum clearance between a battery terminal and the containment wall needs to be at least
Question 126 of 401
126. Question
A permanent leak containment enclosure is required for which of the following
Question 127 of 401
127. Question
Which of the following are concerns that need to be addressed when staging batteries on a job site?
Question 128 of 401
128. Question
If you have any questions concerning battery installation considerations, you should
Question 129 of 401
129. Question
This image is an example of a:
Question 130 of 401
130. Question
Considering polarity and chemical hazards are important when racking batteries.
Question 131 of 401
131. Question
Active ventilation is required for all batteries that may release gas.
Question 132 of 401
132. Question
When racking batteries in relationship to a construction MOP, one should always consider:
Question 133 of 401
133. Question
When lifting and moving large wet cell batteries, one should:
Question 134 of 401
134. Question
Typically, racking manufacturers recommend working _______ on multi-tier racks:
Question 135 of 401
135. Question
One should not work from top to bottom when there is a tipping hazard:
Question 136 of 401
136. Question
When installing batteries in a rack, one should consider terminal orientation so that it is easier to make proper connections both in series and in parallel after installation.
Question 137 of 401
137. 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 138 of 401
138. Question
Manufacturer approved lubricant should be used to aid in sliding batteries along racks.
Question 139 of 401
139. Question
Four 6-volt lead-acid batteries are connected in series. What is the nominal voltage of the battery string?
Question 140 of 401
140. Question
Which of the following is generally used when making connections between racks, tiers, rows and aisles?
Question 141 of 401
141. Question
Prior to installation of cells, a plan should be developed based on a connection diagram to avoid polarity issues.
Question 142 of 401
142. Question
IEEE installation procedures state that as cells are installed one should:
Question 143 of 401
143. Question
IEEE installation procedures state that as cells are installed one should:
Question 144 of 401
144. Question
When cells are connected in a parallel circuit
Question 145 of 401
145. Question
When cells are connected in a series circuit _________.
Question 146 of 401
146. Question
If cell voltage=3.7 V and charge capacity=9.6 Ah, calculate the total voltage and total energy capacity for a module of 48 cells connected in parallel.
Note: W(Wh) = q(Ah)*V(v)
Question 147 of 401
147. Question
A lithium-ion battery has a 1C rated capacity of 128ah, what is a likely capacity at a 2C-rate?
Question 148 of 401
148. Question
Name the smallest component of an electrochemical energy storage system (ESS) that stores chemical energy.
Question 149 of 401
149. Question
Four 6-volt lead-acid batteries are connected in series. They are rated at 2000 amps Isc. What is the short circuit current of the battery string?
Question 150 of 401
150. Question
Connectors are sized for
Question 151 of 401
151. Question
It is impossible to lock out voltage from the terminals of batteries other than by providing an insulation barrier.
Question 152 of 401
152. 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 153 of 401
153. Question
As batteries are connected in series, the voltage does not accumulate but remains as that of the individual cells; therefore, the initial PPE category selected does not need to be increased.
Question 154 of 401
154. Question
Which of the following are exposures that present risks when working on a dc battery energy storage system?
Question 155 of 401
155. Question
The parallel connection of batteries or battery segments greatly increases the potential of short-circuit current and may change the PPE category and arc-flash boundary.
Question 156 of 401
156. Question
The risk of arc flash increases when batteries are installed in an enclosure.
Question 157 of 401
157. Question
The number and thickness of connectors is a function of
Question 158 of 401
158. Question
The greatest risk from an improper connection is:
Question 159 of 401
159. Question
What is generally used to make connections between racks, tiers, steps, rows, and isles?
Question 160 of 401
160. Question
Intercell and intersegment connections should only be made after:
Question 161 of 401
161. Question
What type of connector is typically used to terminate flexible cable?
Question 162 of 401
162. Question
Which type of connector is used in battery systems that exhibit thermal contraction and expansion, have the need for frequent battery replacement and exhibit limited work space?
Question 163 of 401
163. Question
Battery connectors are sized for:
Question 164 of 401
164. Question
Which finely stranded cable has 19 strands of cable in sizes 18 AWG to 2 AWG, 37 strands of cable in sizes 1 AWG to 4/0 AWG, and 61 strands of cable in sizes 250 kcmil to 500 kcmil?
Question 165 of 401
165. Question
NEC 110.14 states that solid electrical connections should be made by torqueing according to:
Question 166 of 401
166. Question
Torqueing of battery connections is done to:
Question 167 of 401
167. Question
When checking polarity and measuring voltage of each cell installed in a rack, it is important to:
Question 168 of 401
168. Question
When making battery connections, _____________ could be the result of over-torque.
Question 169 of 401
169. Question
What type of tools are required for all work on live battery components?
Question 170 of 401
170. Question
Unless specified by the manufacturer, it is not necessary to clean terminal posts and connecting hardware prior to installation.
Question 171 of 401
171. Question
A common corrosion inhibitor used for battery terminals is:
Question 172 of 401
172. Question
A good material for cleaning lead-acid battery terminals that have corroded is:
Question 173 of 401
173. Question
It is appropriate to grease nut/bolt hardware:
Question 174 of 401
174. Question
________ is a good material for resisting corrosion, therefore used in most connection hardware applications.
Question 175 of 401
175. Question
Which of the following are common connectors recommended by battery manufacturers?
Question 176 of 401
176. Question
A calibrated torque wrench is generally required to achieve the indicated torque value when tightening torque is indicated as a numeric value on equipment or in manufacturer’s installation instructions.
Question 177 of 401
177. Question
Flexible cable is often used in battery systems where
Question 178 of 401
178. 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 179 of 401
179. Question
Fine stranded cables are terminated with
Question 180 of 401
180. Question
Before constructing cables, one should:
Question 181 of 401
181. Question
As batteries are connected in series which of the following occurs?
Question 182 of 401
182. Question
As the length of wire in a dc circuit increases the voltage __________.
Question 183 of 401
183. Question
Voltage drop in dc systems is a __________.
Question 184 of 401
184. Question
In a dc ESS having a max steady state current of 100 amps, and total length of wire with a resistance of .00224 ohms, the voltage drop is _______.
Question 185 of 401
185. Question
Calculations for conductor sizing show termination limitations require 2/0 AWG and conditions of use ampacity require 3/0 AWG. Which value should be used to determine conductor size?
Question 186 of 401
186. Question
Which of the following can greatly degrade the health of an entire ESS?
Question 187 of 401
187. Question
The series connections of battery modules require an increase in conductor size.
Question 188 of 401
188. Question
In ESSs, flexible fine stranded cables shall only be used with ________ in accordance with 110.14.
Question 189 of 401
189. Question
2020 NEC 706.15 Disconnecting Means states that for energy storage systems:
Question 190 of 401
190. Question
2020 NEC 706.31 Overcurrent Protection states that overcurrent protection devices, either fuses or circuits breakers, used in any dc portion of an ESS shall have the appropriate voltage, current and interrupting ratings for the application.
Question 191 of 401
191. Question
Thermal protection in a circuit breaker protects against short circuits and faults, which are drastically larger than an overload.
Question 192 of 401
192. Question
When a fused disconnect is utilized, the line terminals of the disconnecting means shall be
Question 193 of 401
193. 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 194 of 401
194. Question
Calculations for conductor sizing show termination limitations requiring 450 kcmil and conditions of use ampacity to require 400 kcmil. Which value should be used to determine conductor size?
Question 195 of 401
195. Question
The electric arc in a double-break contact system can continue to burn after an OCPD is tripped if the dc voltage wasn’t considered accurately.
Question 196 of 401
196. 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 197 of 401
197. Question
Cable insulation properties and applications are covered in NEC [2017] Table 310.104(A), and/or NEC [2020] Table 310.4(A).
Question 198 of 401
198. Question
Wiring methods used for ESSs are covered by _________.
Question 199 of 401
199. Question
What has a practical working limit of 100m?
Question 200 of 401
200. Question
Sensitive control wires should be_________.
Question 201 of 401
201. Question
The CellWatch battery monitoring system monitors
Question 202 of 401
202. Question
A challenge with microgrid control installation is that they typically utilize
Question 203 of 401
203. Question
Ethernet cabling must be terminated in a specific pair order
Question 204 of 401
204. Question
CAN bus and Modbus are examples of
Question 205 of 401
205. Question
Balancing circuitry is often used for
Question 206 of 401
206. Question
In ESM systems, fiber optics are often used to
Question 207 of 401
207. Question
A shielded cable should have the shield terminated and grounded
Question 208 of 401
208. Question
The best shield to prevent interference in a BMS is
Question 209 of 401
209. Question
Electrical interference to control wiring in a BMS can be
Question 210 of 401
210. Question
Both Ethernet and RS 485 wiring can be used in a BMS.
Question 211 of 401
211. Question
Wiring interfaces for a BMS often include
Question 212 of 401
212. Question
Grounding is done by
Question 213 of 401
213. Question
A 24-volt Pb VRLA battery string is positively grounded. What conductor will the disconnect break?
Question 214 of 401
214. Question
Which of the following is true?
Question 215 of 401
215. Question
In an ungrounded (floating) PV system, which conductor(s) is (are) switched when disconnected?
Question 216 of 401
216. Question
System grounding limits voltages imposed by
Question 217 of 401
217. Question
Which organization provides minimum safety requirements that are intended to protect persons and property from hazards associated with the use of electricity?
Question 218 of 401
218. Question
Which of the following is necessary for safe electrical installations?
Question 219 of 401
219. Question
Which of the following must be bonded together and connected to ground to enhance the safety of an electrical installation?
Question 220 of 401
220. Question
Grounding is done to limit hazardous ______ exposure.
Question 221 of 401
221. Question
Bonding is accomplished when _______
Question 222 of 401
222. Question
A grounded conductor is forced to take on _____ potential as ground (Earth).
Question 223 of 401
223. Question
A conductive body extending the ground connection ________
Question 224 of 401
224. Question
The purpose of grounding and bonding is to construct _________.
Question 225 of 401
225. Question
Bonding equipment establishes _________ potential difference(s) between conductive parts, which result in continuity throughout the grounding system.
Question 226 of 401
226. Question
Which of the following can be used to create a bond?
Question 227 of 401
227. Question
DC systems must be ________
Question 228 of 401
228. Question
For a two-wire dc system, what is the voltage range required for the system to be grounded.
Question 229 of 401
229. Question
What is the maximum circuit ampere value which doesn’t require system grounding for a dc system per 2020 NEC 250.162(A)?
Question 230 of 401
230. Question
Section 250.4(A)(5) Effective Ground-Fault Current Path of the NEC states that:
Question 231 of 401
231. Question
Section 250.4(B) Ungrounded Systems, of the NEC covers
Question 232 of 401
232. Question
The NEC requires _________ when a phase-to-ground fault event happens on ungrounded systems.
Question 233 of 401
233. Question
The NEC provides bonding requirements for conductive materials that are ________.
Question 234 of 401
234. Question
The NEC states that dc systems
Question 235 of 401
235. Question
Grounding in a three-wire dc system occurs from the
Question 236 of 401
236. Question
When a dc system is on the premises, where can the grounding electrode conductor be located?
Question 237 of 401
237. Question
For DC systems Section 250 of the NEC addresses
Question 238 of 401
238. Question
For dc systems, the grounding electrode conductor connection is not permitted to be made at individual services or any other point on the premises wiring if _______
Question 239 of 401
239. Question
A grounding electrode conductor (GEC) for a dc system shall be continuous.
Question 240 of 401
240. Question
A dc system bonding jumper
Question 241 of 401
241. Question
Modbus RTU serial cabling typically requires what at the end of the line?
Question 242 of 401
242. Question
PC-based site control systems often use a network switch and which type of cabling between devices?
Question 243 of 401
243. Question
Site controllers can be PC or PLC based
Question 244 of 401
244. Question
A BMS balancing type where energy is transferred between cells and therefore is not wasted is called what?
Question 245 of 401
245. Question
A BMS balances batteries by removing charge from the most-full cells to leave room for charging or adding resistances so the others can catch up.
Question 246 of 401
246. Question
Managing charge and discharge is accomplished by a BMS through monitoring key variables and activating input signals based on them.
Question 247 of 401
247. Question
Protecting batteries installed in a series string by a BMS is harder because cell voltages do not always divide equally among the string, causing SOCs to vary.
Question 248 of 401
248. Question
What are the functions of BMS systems?
Question 249 of 401
249. Question
Common types of manufacturers specifications for control and communication wiring include
Question 250 of 401
250. Question
Which of the following protects the microgrid’s systems health and local operational specifications?
Question 251 of 401
251. Question
Out of the following options, which one is not a part of BMS systems and controls
Question 252 of 401
252. Question
Under what circumstances will a BMS issue a “battery cannot accept charge” or “battery cannot deliver charge” signal to the inverter.
Question 253 of 401
253. Question
What is the full-form of CAN Bus?
Question 254 of 401
254. Question
What are the key values in monitoring BMS systems?
Question 255 of 401
255. Question
Electrical safety during an ESS installation is addressed by:
Question 256 of 401
256. Question
Space about battery systems must comply with working space required by NEC 110.26.
Question 257 of 401
257. Question
Identify the over-current protection devices from the following options:
Question 258 of 401
258. Question
Considering the installation of ESSs, which of the following takes precedence in the hierarchy?
Question 259 of 401
259. Question
Which of the following governs ESS electrical safety, emergency shutoff, workspace, electrical connections/installation on the customer side of the meter?
Question 260 of 401
260. Question
Spill containment, neutralizing and disposal is governed by which of the following?
Question 261 of 401
261. Question
Which of the following covers safety for ESSs installations?
Question 262 of 401
262. Question
Safe energy storage equipment, installations, and systems pertain to:
Question 263 of 401
263. Question
In the event of an emergency relating to an ESS, who oversees the response?
Question 264 of 401
264. Question
Which of the following covers direct current microgrids?
Question 265 of 401
265. Question
Cables used in ESS systems installed in buildings must comply with NEC classifications
Question 266 of 401
266. Question
NFPA 70, Article 710 states that all ESS equipment shall be listed and labeled or field labeled for its intended use.
Question 267 of 401
267. Question
The best reference for ESS special conditions can be found in NFPA 70:
Question 268 of 401
268. Question
The controls for an Energy Management System are capable of:
Question 269 of 401
269. Question
Which of the following is not part of an Energy Management System?
Question 270 of 401
270. Question
Energy Management Systems are designed so that they can override any alternate power sources for fire pumps, health care facilities, emergency systems, legally required standby systems and critical operations power systems.
Question 271 of 401
271. Question
NEIS describes specific installation practices that go beyond the minimum safety requirements found in the NEC.
Question 272 of 401
272. Question
Recommended practice for maintaining ESS can be found in:
Question 273 of 401
273. Question
Workspace requirements for a battery installation are prescribed by:
Question 274 of 401
274. Question
What are the causes for internal short circuiting in Lithium-ion battery?
Question 275 of 401
275. Question
Which of the following precautions should be taken when working around batteries?
Question 276 of 401
276. Question
Which of the following causes electrolyte leakage in a Li-ion battery?
Question 277 of 401
277. Question
Which of the following may cause thermal runaway in a Li-ion battery?
Question 278 of 401
278. Question
Li-ion batteries may create thermal injury hazards caused by overheating.
Question 279 of 401
279. Question
Overvoltage in Li-ion batteries may cause electrolyte decomposition leading to thermal runaway.
Question 280 of 401
280. Question
Li-ion battery hazard signs include:
Question 281 of 401
281. Question
Li-ion battery “don’ts” include:
Question 282 of 401
282. Question
What is a physical hazard for vented lead acid?
Question 283 of 401
283. Question
Which of the following is an electrical hazard associated with battery energy storage systems?
Question 284 of 401
284. Question
A hazard posed by lead-acid batteries is:
Question 285 of 401
285. Question
Lead-acid battery hazard signs include:
Question 286 of 401
286. Question
When planning ahead for locating and installing a battery rack one could install the following in case of electrolyte leakage or spills:
Question 287 of 401
287. Question
Electrolyte danger associated with lead-acid batteries is primarily caused by spills. These can occur when:
Question 288 of 401
288. Question
The general inspection of batteries and the location of installation should address:
Question 289 of 401
289. Question
If one notices broken lead-acid batteries which of the following procedures should be followed
Question 290 of 401
290. Question
If one notices damaged Li-ion batteries which of the following procedures should be followed
Question 291 of 401
291. Question
Batteries present risks due to chemical and physical hazards in addition to electrical hazards.
Question 292 of 401
292. Question
Applying charge to an over-discharged Li-ion battery can result in overheating and fire.
Question 293 of 401
293. Question
Overvoltage of Li-ion batteries may
Question 294 of 401
294. Question
Excessive charge and discharge rates to Li-ion batteries may cause
Question 295 of 401
295. Question
Excessive charge and discharge rates to Li-ion batteries may cause
Question 296 of 401
296. Question
Which of the following batteries requires rewatering?
Question 297 of 401
297. Question
Which of the following poses a chemical hazard in lead acid batteries?
Question 298 of 401
298. Question
Which of the following is the most common cause of formation of gas bubbles in a lead acid battery?
Question 299 of 401
299. Question
Overcharging a lead-acid battery may produce:
Question 300 of 401
300. Question
The safety diamond represents:
Question 301 of 401
301. Question
The safety diamond represents:
Question 302 of 401
302. Question
Battery acid is highly flammable:
Question 303 of 401
303. Question
In lead-acid chemistry, hydrogen is most likely present during:
Question 304 of 401
304. Question
Thermal runaway is a common concern for
Question 305 of 401
305. Question
Passive ventilation can be used, but is not always sufficient, for vented (flooded) batteries that discharge hydrogen.
Question 306 of 401
306. Question
Which of the following present a fire risk from a Li-ion battery?
Question 307 of 401
307. Question
Which of the following present a fire risk from a lead-acid battery?
Question 308 of 401
308. Question
It is safe to charge a lithium battery without a high voltage cutoff.
Question 309 of 401
309. Question
Lithium chemistry has a low voltage threshold at around _________ volts per cell, typically.
Question 310 of 401
310. Question
Lithium chemistry is susceptible to thermal runaway from:
Question 311 of 401
311. Question
Ventilation requirements for lithium batteries have been established by:
Question 312 of 401
312. Question
Vaporized lead exposure is a chemical hazard when working in a battery room.
Question 313 of 401
313. Question
Some activities require PPE rated for both arc flash and chemical exposure
Question 314 of 401
314. Question
Chemical PPE is not required when performing activities that do not involve handling electrolyte such as:
Question 315 of 401
315. Question
Under normal circumstances, lithium batteries have no associated chemical risks
Question 316 of 401
316. Question
Rain gear can be used to protect from chemical spills without being evaluated per ASTM1296
Question 317 of 401
317. Question
Chemical PPE is required when racking AGM batteries
Question 318 of 401
318. Question
Common PPE to protect against chemical hazards presented by batteries does not include:
Question 319 of 401
319. Question
Selecting the appropriate PPE for a battery installation can be done by utilizing a PPE flow chart to determine:
Question 320 of 401
320. Question
Which of the following PPE should be used when placing wet cell batteries in racks?
Question 321 of 401
321. Question
Which of the following is not PPE required for handling and racking lead-acid, wet-cell batteries?
Question 322 of 401
322. Question
One should never work on installing vented lead-acid batteries unless an eye wash station or kit is in proximity.
Question 323 of 401
323. Question
The most common danger from a wet cell battery is sulfuric acid, one of its electrolyte components.
Question 324 of 401
324. Question
Splash proof goggles are required when working with electrolyte while wearing a face shield
Question 325 of 401
325. Question
When working on lead-acid batteries or with acids, which of the following is required first aid and emergency equipment?
Question 326 of 401
326. Question
When working on lead-acid batteries or with acids, which of the following is needed according to OSHA 1926?
Question 327 of 401
327. Question
What PPE should be used to deal with chemical hazards?
Question 328 of 401
328. Question
Performing voltage testing on a battery energy storage system is justified energized work.
Question 329 of 401
329. Question
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.
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?
You are performing maintenance on a single cell in an open rack. The array is 220Vnom with a bolted fault current of 2.3kA, what arc-flash category PPE should you wear?
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 337 of 401
337. Question
Category 3 PPE for arc flash and shock risk includes clothing with a minimum incident energy rating of:
Question 338 of 401
338. Question
Which of the following is not listed as Category 1 PPE for arc flash and shock risk?
Question 339 of 401
339. Question
Justifications for work involving electrical hazards include:
Question 340 of 401
340. Question
Adding a circuit breaker to a battery energy storage system is justified energized work.
Question 341 of 401
341. Question
A field-expedient neutralizing agent is ______.
Question 342 of 401
342. Question
What typically indicates the completion of a neutralization method?
Question 343 of 401
343. Question
In case of sulfuric acid contact with clothing or material one should _______.
Question 344 of 401
344. Question
The best place to secure emergency and first aid procedures in the event of an emergency involving batteries is from:
Question 345 of 401
345. Question
A neutralizing agent, rubber gloves and containment bag are part of a _________.
Question 346 of 401
346. Question
For large spills of concentrated sulfuric acid what may be required before a neutralizing agent is introduced?
Question 347 of 401
347. Question
A spill kit can be used to:
Question 348 of 401
348. Question
Article 130.5 states that it is acceptable to use the results of an incident energy analysis to specify the Arc Flash PPE Category from Table 130.7(C)(16).
Question 349 of 401
349. Question
When performing a job hazard analysis what is the hierarchy of risk control order?
Question 350 of 401
350. Question
When performing a job hazard analysis which of the following is not an engineering controls issue?
Question 351 of 401
351. Question
When performing a job hazard analysis which of the following is not an administrative controls issue?
Question 352 of 401
352. Question
What type of hazard is created when two workers remove damaged Li-ion modules from a system?
Question 353 of 401
353. Question
When performing a job hazard analysis, one should:
Question 354 of 401
354. Question
NFPA 70E, Article 320 states that electrical safety requirements for practical safeguarding employees while working with exposed stationary storage must be applied when direct current voltage exceeds:
Question 355 of 401
355. Question
NFPA 70E, Article 320 states that a battery risk assessment shall be performed to identify:
Question 356 of 401
356. Question
NFPA 70E, Article 320 states that it is ok to wear metal jewelry such as a watch or ring as long as it is covered by insulated rubber or leather gloves.
Question 357 of 401
357. Question
NFPA 70E, Article 320 states that chemical hazards produced by batteries include the potential of explosive gas; therefore, smoking in this working environment is prohibited.
Question 358 of 401
358. Question
NFPA 70E, Article 320 states that tools and equipment shall be:
Question 359 of 401
359. Question
Article 130.5 states that an arc flash risk assessment shall determine:
Question 360 of 401
360. Question
NFPA 70E 110.6(A)(1) states that employees do not have to be trained on an appropriate test instrument to verify the absence of voltage if a battery energy storage system is locked out and tagged out.
Question 361 of 401
361. Question
Work space requirements around battery energy storage systems must comply with those required by NFPA 70 (NEC) 110.26.
Question 362 of 401
362. Question
Exposure to current above ______ can be life threatening.
Question 363 of 401
363. Question
NFPA 70E provides the prescriptive components to meet OSHA performance-based requirements.
Question 364 of 401
364. Question
Moveable or fixed conductors and circuit parts changes the _________ boundary, but not the ________ boundary.
Question 365 of 401
365. Question
Incident energy increases as the distance from arc fault decreases; therefore, increased PPE may be needed.
Question 366 of 401
366. Question
_______ is defined as a combination of the likelihood of occurrence of injury or damage to health and the severity of injury or damage to health that results from a hazard.
Question 367 of 401
367. Question
What is the LAST CHOICE when mitigating risk caused by an unsafe work environment?
Question 368 of 401
368. Question
NFPA 70E 110.6(A)(1) Qualified Person states that in addition to Article 110 general requirements for ESRWP workers shall also be familiar with:
Question 369 of 401
369. Question
2021 NFPA 70e Article 110 General Requirements for ESRWP states that all licensed electricians may use test instruments such as a voltage detector, multimeter or amprobe when working on a battery energy storage system.
Question 370 of 401
370. Question
NFPA 70E Section 110.4 Energized Work states that work on an energized system can be justified if the voltage is less than ______ if capacity of source and OCPD plus exposure to arc flash are considered and there is no increased exposures to burns or explosions.
Question 371 of 401
371. 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 372 of 401
372. Question
Which of the following is not determined by a shock risk assessment performed for an energized electrical work permit?
Question 373 of 401
373. Question
A qualified person may escort unqualified persons inside a LAB and inside a RAB.
Question 374 of 401
374. Question
At what voltage is arc flash PPE required for work on direct current systems?
Question 375 of 401
375. Question
The minimum acceptable PPE and precautions for thermal hazard shall include:
Question 376 of 401
376. Question
According to NFPA 70E Section 110.4 Energized Work, additional hazards or increased risks include: