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Question 1 of 100
Which of the following is not characteristic of a microgrid?
Question 2 of 100
What mode most closely defines the microgrid’s operation in the following image?
Question 3 of 100
Which type of microgrid is connected to a traditional utility, capable of operating in island mode, and has multiple generators and sophisticated controls?
Question 4 of 100
Which factor is not driving demand and affecting microgrid market development?
Question 5 of 100
In an ac-coupled system, ______
Question 6 of 100
Distributed generation reciprocating engines used for combined heat and power generation have a greater electrical output range than gas turbine engines.
Question 7 of 100
Which of the following show promise for battery energy storage systems within microgrids?
Question 8 of 100
Lithium ESS batteries need to have a float charge cycle.
Question 9 of 100
Which of the following is not a typical component of a battery cell?
Question 10 of 100
State of charge is often estimated with?
Question 11 of 100
Lead-acid batteries with thicker plates and larger acid volume are typically for:
Question 12 of 100
The discharge rate of a battery is not affected by temperature.
Question 13 of 100
Deterioration, or ageing, of a battery is dependent on:
Question 14 of 100
As PV modules are wired in series and parallel voltage and current decrease.
Question 15 of 100
In order to mitigate solar PV variability, which of the following could be used?
Question 16 of 100
A microinverter typically connects to
Question 17 of 100
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 18 of 100
An expression of the present battery capacity as a percentage of maximum capacity is
Question 19 of 100
Tools needed to conduct wet cell electrolyte testing include
Question 20 of 100
Above _________, the interrupting capability of ac equipment with double-breaking contacts (such as contactors) decreases strongly.
Question 21 of 100
To guarantee breaking of a short-circuit in a dc system, breakers must:
Question 22 of 100
Energy storage systems and dc systems may require specialty meters to measure within ranges that are not found on regular meters
Question 23 of 100
When you open the door to a battery enclosure, the most important thing to do first is:
Question 24 of 100
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 25 of 100
Which of the following are hazards associated with moving batteries?
Question 26 of 100
When is it appropriate to perform individual voltage tests on a battery?
Question 27 of 100
When determining racking and battery risks, which of the following is not common to Lead Acid/VRLA?
Question 28 of 100
According to the IEEE installation procedure, its recommendations supersede those provided by the manufacturer.
Question 29 of 100
Which of the following should be considered when determining a method of procedure for the installation of batteries in a rack?
Question 30 of 100
Seismic racks typically differ from non-seismic racks by incorporating
Question 31 of 100
Which of the following apply to safe handling and storage of batteries?
Question 32 of 100
Batteries are very heavy and may require a lift table or several workers when racking them.
Question 33 of 100
If you have any questions concerning battery installation considerations, you should
Question 34 of 100
When racking batteries in relationship to a construction MOP, one should always consider:
Question 35 of 100
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 36 of 100
Four 6-volt lead-acid batteries are connected in series. What is the nominal voltage of the battery string?
Question 37 of 100
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 38 of 100
IEEE installation procedures state that as cells are installed one should:
Question 39 of 100
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 40 of 100
The risk of arc flash increases when batteries are installed in an enclosure.
Question 41 of 100
________ is a good material for resisting corrosion, therefore used in most connection hardware applications.
Question 42 of 100
Unless specified by the manufacturer, it is not necessary to clean terminal posts and connecting hardware prior to installation.
Question 43 of 100
The greatest risk from an improper connection is:
Question 44 of 100
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 45 of 100
Before constructing cables, one should:
Question 46 of 100
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 47 of 100
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 48 of 100
Thermal protection in a circuit breaker protects against short circuits and faults, which are drastically larger than an overload.
Question 49 of 100
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 50 of 100
Wiring interfaces for a BMS often include
Question 51 of 100
A shielded cable should have the shield terminated and grounded
Question 52 of 100
Ethernet cabling must be terminated in a specific pair order
Question 53 of 100
Grounding is done by
Question 54 of 100
System grounding limits voltages imposed by
Question 55 of 100
Grounding is done to limit hazardous ______ exposure.
Question 56 of 100
The purpose of grounding and bonding is to construct _________.
Question 57 of 100
What is the maximum circuit ampere value which doesn’t require system grounding for a dc system per 2020 NEC 250.162(A)?
Question 58 of 100
The NEC provides bonding requirements for conductive materials that are ________.
Question 59 of 100
What are the key values in monitoring BMS systems?
Question 60 of 100
Out of the following options, which one is not a part of BMS systems and controls
Question 61 of 100
What are the functions of BMS systems?
Question 62 of 100
A BMS balancing type where energy is transferred between cells and therefore is not wasted is called what?
Question 63 of 100
Space about battery systems must comply with working space required by NEC 110.26.
Question 64 of 100
Spill containment, neutralizing and disposal is governed by which of the following?
Question 65 of 100
In the event of an emergency relating to an ESS, who oversees the response?
Question 66 of 100
The best reference for ESS special conditions can be found in NFPA 70:
Question 67 of 100
NEIS describes specific installation practices that go beyond the minimum safety requirements found in the NEC.
Question 68 of 100
Which of the following precautions should be taken when working around batteries?
Question 69 of 100
Overvoltage in Li-ion batteries may cause electrolyte decomposition leading to thermal runaway.
Question 70 of 100
What are the causes for internal short circuiting in Lithium-ion battery?
Question 71 of 100
A hazard posed by lead-acid batteries is:
Question 72 of 100
Overcharging a lead-acid battery may produce:
Question 73 of 100
Excessive charge and discharge rates to Li-ion batteries may cause
Question 74 of 100
Which of the following present a fire risk from a lead-acid battery?
Question 75 of 100
In lead-acid chemistry, hydrogen is most likely present during:
Question 76 of 100
Ventilation requirements for lithium batteries have been established by:
Question 77 of 100
What PPE should be used to deal with chemical hazards?
Question 78 of 100
The most common danger from a wet cell battery is sulfuric acid, one of its electrolyte components.
Question 79 of 100
Selecting the appropriate PPE for a battery installation can be done by utilizing a PPE flow chart to determine:
Question 80 of 100
Under normal circumstances, lithium batteries have no associated chemical risks
Question 81 of 100
Performing voltage testing on a battery energy storage system is justified energized work.
Question 82 of 100
Category 3 PPE for arc flash and shock risk includes clothing with a minimum incident energy rating of:
Question 83 of 100
If NFPA 70E Table 130.7(C)15(b) “Arc-Flash PPE Categories for Direct Current (dc) Systems” cannot be used, what must be performed to select PPE?
Question 84 of 100
The formula for performing a dc incident energy analysis can be found in what NFPA 70E informative annex?
Question 85 of 100
A spill kit can be used to:
Question 86 of 100
The best place to secure emergency and first aid procedures in the event of an emergency involving batteries is from:
Question 87 of 100
When performing a job hazard analysis what is the hierarchy of risk control order?
Question 88 of 100
When performing a job hazard analysis, one should:
Question 89 of 100
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 90 of 100
Work space requirements around battery energy storage systems must comply with those required by NFPA 70 (NEC) 110.26.
Question 91 of 100
Incident energy increases as the distance from arc fault decreases; therefore, increased PPE may be needed.
Question 92 of 100
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 93 of 100
A qualified person may escort unqualified persons inside a LAB and inside a RAB.
Question 94 of 100
According to NFPA 70E Section 110.4 Energized Work, additional hazards or increased risks include:
Question 95 of 100
In order to limit arc flash and shock hazards during the installation of a BMS, control wiring should take place ________.
Question 96 of 100
A qualified person may escort an unqualified person inside both a limited approach boundary (LAB) and restricted approach boundary (RAB).
Question 97 of 100
NFPA 70E 320.3(A)(1) states the energy threshold for dc systems is ______ volts.
Question 98 of 100
The arc flash boundary (AFB) may be larger than the limited approach boundary (LAB).
Question 99 of 100
How can the exact available short circuit current values be determined for a battery energy storage system?
Question 100 of 100
You should always wear the highest-rated arc-flash PPE you have available.
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