Deck 10: Comprehensive Provisions

Question 1

General receptacle installation provisions for multifamily dwellings are almost identical to those for ____.

A) commercial properties
B) garage facilities
C) dual family dwellings
D) one family dwellings

Answer 1

D

Question 2

The vertical clearance above roof level must be maintained for a distance of at least ____ ft from all edges of the roof.

A) 3
B) 4
C) 6
D) 8

Answer 2

A

Question 3

All electric equipment must be ____ to allow ready and safe equipment operation and maintenance.

A) externally grounded
B) surrounded by sufficient unobstructed space
C) enclosed within a metal cabinet
D) surrounded by at least 2 ft of ventilation space

Answer 3

B

Question 4

Service conductors supplying a building (or other structure) shall not ____.

A) terminate in a panel
B) be enclosed in a six-gang enclosure
C) pass through the interior of another building
D) have less than two disconnects

Question 5

A drip loop's lowest point has a minimum vertical clearance of ____ ft.

A) 4
B) 6
C) 8
D) 10

Question 6

Dwelling-unit branch circuits shall supply only loads within, or associated only with, ____.

A) dwellings in that vertical line
B) a parallel unit
C) other branch circuits
D) that dwelling unit

Question 7

____ is the maximum number of disconnects per service grouped in any one location.

A) Two
B) Three
C) Six
D) Nine

Question 8

Each occupant must have ready access to ____ protecting the conductors supplying that occupancy.

A) primary feeders
B) all overcurrent devices
C) panel boxes
D) service laterals

Question 9

The conductors and equipment that deliver energy from the electricity supply system to the wiring system of the premises are called the ____.

A) main feeders
B) service
C) central lines
D) primary carriers

Question 10

All 125-volt, single-phase, 15- and 20-ampere dwelling unit outdoor receptacles must have ____.

A) separate circuit breakers
B) interior grounding
C) GFCI protection
D) exterior grounding

Question 11

____ is defined as the underground conductors between the utility electric supply system and the service point.

A) Service lateral
B) Primary branch
C) Ancillary service
D) Connection branch

Question 12

If each feeder is 100 amperes, the minimum conductor size is ____.

A) 4 AWG copper (or 2 AWG aluminum)
B) 2 AWG copper (or 4 AWG aluminum)
C) 6 AWG copper (or 3 AWG aluminum)
D) 8 AWG copper (or4 AWG aluminum)

Question 13

If the load requirements of a single-phase installation are greater than the serving agency normally supplies through one service, ____ are permitted.

A) additional agencies
B) multiple branches
C) service disconnects
D) multiple services

Question 14

A minimum of ____ wall switch-controlled lighting outlet(s) is (are) required for dwelling hallways.

A) one
B) two
C) three
D) four

Question 15

Kitchen receptacles not serving countertops (such as receptacles behind refrigerators) ____ unless they are installed within 6 ft of the outside edge of the sink.

A) must be on a separate branch circuit
B) require a dual phase leader
C) do not require GFCI protection
D) are not counted towards total load

Question 16

On long runs, it may be necessary to ____ to compensate for voltage drop.

A) decrease the branch circuit length
B) apply an approved voltage amplifier
C) boost supply influx
D) increase the branch-circuit conductor's size

Question 17

A multifamily dwelling is a building containing ____ dwelling units.

A) one or more
B) two or more
C) three or more
D) four or more

Question 18

Skin effect and induction change the resistance in alternating-current (ac) circuits, therefore resistance of a conductor is ____.

A) slightly lower in an ac circuit
B) reciprocally lower in a dc circuit
C) slightly higher in an ac circuit
D) reciprocally higher in a dc circuit

Question 19

Conductors must have ____ and sufficient ampacity to carry the current for the load as calculated.

A) sufficient length
B) adequate insulation
C) adequate mechanical strength
D) definitive markings

Question 20

The maximum distance to any receptacle, measured horizontally along the wall line, is ____ in.

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

Question 21

A single-phase feeder (or branch circuit) conductor will have a total resistance ____ that of one conductor.

A) half
B) twice
C) three times
D) four times

Question 22

The higher the resistance through a conductor, the ____.

A) smaller the voltage drop
B) higher the voltage drop
C) the more stable the current
D) more neutral the offset

Question 23

The conductor voltage that is dropped is a percentage of the source voltage and can be calculated by ____.

A) multiplying voltage drop by the source voltage
B) adding voltage drop to the source voltage
C) subtracting voltage drop from the source voltage
D) dividing voltage drop by the source voltage

Question 24

The larger the circular mil area of a conductor, the ____.

A) greater the resistance
B) more insulation required
C) more flexible the conductor
D) smaller the resistance

Question 25

Voltage drop in a single-phase circuit can also be found using the formula ____.

A) Voltage drop =R x L x I/2
B) Voltage drop = 2.46 x R x L x I
C) Voltage drop = 2 x R x L x I
D) Voltage drop = K x L/I