Question 1

Type UF "underground feeder" cable ____ permitted to be used to supply service entrances.

Accepted Answer

A)   is
B)   is not B

Question 2

To provide shock protection, low-voltage wiring systems are required by Article 411 to be ____.

Accepted Answer

A)   double-insulated
B)   grounded
C)   supplied through isolating transformers
D)   all of the above C

Question 3

The last sentence of 250.4(A)(5) states that "the earth shall not be considered as an effective ____________________."

Accepted Answer

ground-fault current path
ground fault current path

Question 4

The minimum depth for a 120-volt, 15-ampere, GFCI-protected circuit to an outdoor pole light run under a paved driveway is ____.

Accepted Answer

A)   6 inches
B)   12 inches
C)   18 inches
D)   24 inches

Question 5

What type of cable is permitted to be used for direct burial applications?

Accepted Answer

A)   Type NMB
B)   Type UF
C)   Type NMS
D)   both a and c

Question 6

Minimum cover requirements for direct-buried cables and raceways under a variety of conditions are given in Table ____________________.

Accepted Answer

The answer of Minimum cover requirements for direct-buried cables and...

Question 7

Outdoor lighting fixtures and associated equipment ____ permitted to be supported by trees.

Accepted Answer

A)   are
B)   are not

Question 8

Direct-burial cable is normally required to have a minimum of 24 inches of earth cover. Explain the conditions under which the minimum depth can be reduced to 12 inches for residential occupancies.

Accepted Answer

The answer of Direct-burial cable is normally required to have...

Question 9

When outdoor receptacles are installed where a cord will be plugged in permanently, such as for decorative lighting, the box cover ____ maintain weatherproof integrity when the cord is plugged in.

Accepted Answer

A)   must
B)   need not

Question 10

Explain why, in colder parts of the country, incandescent fixtures are more suitable than fluorescent for unheated spaces like garages.

Accepted Answer

The answer of Explain why, in colder parts of the...

Question 11

Metallic conduit buried underground must be protected against ____.

Accepted Answer

A)   backhoes
B)   corrosion
C)   galvanic action
D)   all of the above

Question 12

Permanent overhead conductor spans are permitted to be supported by live or dead vegetation, such as trees.

Accepted Answer

A) True 
 B)False

Question 13

Explain the rationale for installing supplemental overcurrent protection, such as a "box cover unit" with a switch and fuse combination, to protect an appliance or utilization equipment such as a garage door opener.

Accepted Answer

The answer of Explain the rationale for installing supplemental overcurrent...

Question 14

Conductors suitable for use in ____________________ locations will have the letter "W" in their type designation.

Accepted Answer

The answer of Conductors suitable for use in ____________________ locations...

Question 15

Explain why a post lamp cannot be grounded only with a local ground rod, but must have a separate grounding equipment conductor going back to the residential service.

Accepted Answer

The answer of Explain why a post lamp cannot be...

Question 16

The recommended approach to provide adequate lighting in a residential garage is to install one ____-watt lamp on the ceiling above each side of an automobile.

Accepted Answer

A)   40
B)   60
C)   75
D)   100

Question 17

If you are experiencing too much lamp burnout in your garage door opener, the culprit is probably vibration.

Accepted Answer