Test 11

Question 1

The majority of the regulations governing electrical system integration are found in the National Electrical Code.

Answer 1

True

Question 2

Larger conductors have higher resistance than smaller conductors.

Answer 2

False

Question 3

The NEC recommends a maximum voltage drop of 5%.

Answer 3

False

Question 4

Conductors used for source-circuit wiring may need to be rated for outdoor applications with high temperature, moisture, and sunlight resistance.

Answer 4

True

Question 5

A blocking diode is a diode used to pass current around, rather than through, a group of PV cells or modules.

Answer 5

False

Question 6

Overcurrent protection devices are classified by how quickly they activate.

Answer 6

True

Question 7

A disconnect must be manually operable and may be either a switch or a circuit breaker.

Answer 7

True

Question 8

All current-carrying conductors in the PV output circuit must have disconnect provisions, including the grounded conductor.

Answer 8

True

Question 9

Equipment grounding is not required for all PV systems.

Answer 9

False

Question 10

Improper electrical integration can cause ____.

Answer 10

poor performance, component damage, and electrical shock hazards (all of the above)

Question 11

A PV ____ circuit is the circuit connection the PV power source to the rest of the system.

Answer 11

output

Question 12

For PV source circuits, the maximum current is ____% of the sum of the short-circuit current rating of parallel-connected modules.

Answer 12

125

Question 13

Conductor resistance is determined by the ____.

Answer 13

conductor material, conductor size, and ambient temperature (all of the above)

Question 14

____ is the current that a conductor can carry continuously under the conditions of use without exceeding its temperature rating.

Answer 14

Ampacity

Question 15

A ____ is a protective enclosure used to terminate, combine and connect various circuits or components together.

Answer 15

junction box

Question 16

The overcurrent protection device rating required for PV system circuits is ____% of the calculated maximum circuit current.

Answer 16

125

Question 17

A ____ is a rod, plate, or structure that establishes a connection with the eart.

Answer 17

grounding electrode

Question 18

A(n) ____ is a solid-state device that has a high resistance at low voltages and a low resistance at high voltages.

Answer 18

varistor

Question 19

A ___ box is a junction box used as the connection point for two or more circuits.

Answer 19

combiner

Question 20

A PV ____ circuit is the circuit connecting a group of modules together and to the common connection point of the DC system.

Answer 20

source

Question 21

For one- and two-family homes, the maximum output-circuit voltage cannot be greater than _____ V.

Answer 21

6000

Question 22

Conductor sizing is based on a conductor’s ____ rating.

Answer 22

ampacity

Question 23

____ protects a bare conductor from coming into contact with personnel or equipment.

Answer 23

Insulation

Question 24

Conductor ____ codes are used to identify the purpose of the conductor in the circuit and to match the ends of a conductor.

Answer 24

color

Question 25

In most cases, _____ are preferable to luge because they are easier to install correctly and involve one fewer connection.

Answer 25

screw terminals

Question 26

The ____ is the maximum current that an overcurrent protection device is able to stop without being destroyed or causing an electric arc.

Answer 26

interrupting rating

Question 27

A(n) ___ is a device that protects electrical devices from transients (voltage spikes).

Answer 27

surge arrestor

Question 28

A(n) ____ is the undesirable condition of current flowing through the grounding conductor.

Answer 28

ground fault

Question 29

A(n) ____ is a device that opens the ungrounded and grounded conductors when a ground fault exceeds a certain amount.

Answer 29

ground-fault circuit interrupter