Deck 10: Comprehensive Provisions

Question 1

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

A) 4 ft (1.2 m)
B) 6 ft (1.8 m)
C) 8 ft (2.4 m)
D) 10 ft (3.0 m)

Answer 1

D

Question 2

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

Answer 2

C

Question 3

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

A) 3 ft (900 mm)
B) 4 ft (1.2 m)
C) 6 ft (1.8 m)
D) 8 ft (2.4 m)

Answer 3

A

Question 4

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 5

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

Question 6

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

A) 6 in.(150 mm)
B) 12 in.(300 mm)
C) 18 in.(450 mm)
D) 24 in.(600 mm)

Question 7

Each occupant must have ready access to ____ protecting the conductors supplying that occupancy unless otherwise permitted in 240.24(B)(1) and (B)(2).

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

Question 8

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 9

____ 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 10

The conductors and equipment connecting the serving utility to the wiring system of the premises are called the ____.

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

Question 11

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

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

Question 12

All 125-volt through 250-volt receptacles supplied by single-phase branch circuits rated 150 volts or less to ground serving kitchen countertops must have ____.

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

Question 13

____ is the maximum number of disconnects per service.

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

Question 14

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 15

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 16

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

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

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

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

Question 19

Conductors must have ____ and sufficient ampacity to carry the current for the load as calculated in accordance with Article 220.

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

Question 20

Kitchen receptacles not serving countertops (such as receptacles behind refrigerators) ____ unless they are installed within 6 ft (1.8 m) 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 toward total load

Question 21

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 22

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

A) greater the resistance
B) more insulation that is required
C) more flexible the conductor
D) lower the resistance

Question 23

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 24

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 25

The recommended voltage drop for a branch circuit is ____ % or less.

A) 1
B) 5
C) 3
D) 7