Test 12

Question 1

Most utility electrical power is produced by rotation generators that are mechanically driven.

Answer 1

True

Question 2

Interactive inverters act like a voltage source, while generators act like a current source.

Answer 2

False

Question 3

The most common type of interactive PV system is one that does not use energy storage.

Answer 3

True

Question 4

All utility-interactive inverters must be able to detect power outages and discontinue transfer of power until the utility system returns to normal operation.

Answer 4

True

Question 5

Three-phase inverter output can be achieved by using three smaller inverters and connecting each inverter to a different phase.

Answer 5

True

Question 6

In dwellings, the sum of the ratings of the overcurrent protection devices feeding the busbar or conductor may be up to 150% of the rating of the panel or busbar.

Answer 6

False

Question 7

Electromechanical induction watt-hour meters are the most common type of meters installed by electric utility companies.

Answer 7

True

Question 8

Qualifying-facility agreements are intended for small interconnected PV systems.

Answer 8

False

Question 9

Liability insurance is required by most utilities that have interconnection standards.

Answer 9

True

Question 10

Every state has established rules regarding interconnection and metering.

Answer 10

False

Question 11

_____ generation is a system in which many smaller power-generating systems create electrical power near the point of consumption.

Answer 11

Distributed

Question 12

____ systems are interactive systems that include battery storage.

Answer 12

Bimodal

Question 13

___ systems can be employed to manage and optimize utility energy use by utility customers that are billed using time-of-use rates.

Answer 13

Bimodal

Question 14

In the United States, the technical requirements for PV systems are established through national codes and standards published by ____.

Answer 14

Institute of Electrical and Electronics Engineers (IEEE), Underwriters Laboratories (UL), and National Fire Protection Association (NFPA) (all of the above)

Question 15

Article 690 permits the output of interactive PV inverters to be connected to the ____ side or supply side of the service disconnect.

Answer 15

load

Question 16

____ circuit breakers are circuit breakers on the load side of the main service disconnect that supple PV power to the busbar.

Answer 16

Back-feed

Question 17

The service conductors in a supply-side connection must be sized for at least ____% of the continuous load current, based on the PV system inverter maximum current output rating.

Answer 17

125

Question 18

____ metering records exported and imported electricity separately.

Answer 18

Dual

Question 19

A(n) ____ is a non-utility large-scale power producer that meets the technical and procedural requirements for interconnection to the utility system.

Answer 19

qualifying facility

Question 20

A(n) ____ agreement is a contract between a distributed power producer and an electric utility that establishes the terms and conditions for the interconnection.

Answer 20

interconnection

Question 21

____ is the process of connection a generator to an energized electrical system.

Answer 21

Synchronizing

Question 22

Inverter power output is limited by the capacity of the PV array, the inverter output rating, and ____.

Answer 22

temperature

Question 23

____ is the undesirable condition where an interactive inverter continues to transfer power to the utility grid during a utility outage.

Answer 23

Islanding

Question 24

Interconnection on the load side of the service disconnect is done through ____ circuit breakers.

Answer 24

back-feed

Question 25

A ____-side connection of interactive PV systems requires adding another service in parallel with an existing service disconnect.

Answer 25

supply

Question 26

____ metering uses one meter that can operate in both directions, effectively subtracting exported electricity from imported electricity.

Answer 26

Net

Question 27

____ cost is the cost that utility would normally incur to generate a given amount of power.

Answer 27

Avoided

Question 28

A(n) ____ is a contract between a utility and a qualifying facility that establishes the terms and conditions for interconnection and the rates or tariffs that apply.

Answer 28

qualifying-facility agreement

Question 29

____ rights allow the utility to check for listed equipment and proper installation before interconnection.

Answer 29

Inspection

Question 30

_____ agreements establish some means to credit the customer for excess power supplied to the utility.

Answer 30

Interconnection