Residential Electrician Exam #3/
25Questions with Complete
Correct Answers/Rated A+ and
100% Accurate
What is the MAXIMUM allowable cord length for the cord supplying a
cord-and-plug connected dishwasher installed under a kitchen counter
in a dwelling unit?
a) 11⁄2 feet
b) 2 feet
c) 3 feet
d) 4 feet - -D: 4 feet
Ref: 422.16(B)(2)(2)
-What is the MINIMUM size copper SE cable with type THHW insulation
that may be used as ungrounded, service-entrance phase conductors for
a 150 ampere-rated, 120/240-volt, singlephase, residential service?
a) 1/0 AWG
b) 1 AWG
c) 2 AWG
d) 3 AWG - -B: 1 AWG
Ref: Tbl. 310.15(B)(6)
-For outlet boxes designed to support ceiling-suspended (paddle) fans
that weigh more than _____ pounds, the required marking shall include
the maximum weight to be supported.
a) 20
b) 30
c) 35
d) 70 - -C: 35
Ref: 314.27(D)
-A connection to a driven or buried grounding electrode shall ______.
a) be accessible
b) not be required to be accessible
c) not permitted to be buried
d) be visible - -B: not be required to be accessible
Ref: 250.68(A), Ex.1
-What is the MAXIMUM allowable standard size circuit breaker rating
that may be used to protect a size 8 AWG copper NM-B cable supplying
an electric range?
a) 30 amperes
b) 40 amperes
c) 50 amperes
d) 60 amperes - -B: 40 amperes
, Ref: 334.80; Tbl. 310.16
-The MAXIMUM number of size 10 AWG conductors permitted in a 4
inch x 11⁄4 inch octagon metal junction box is _____.
a) two
b) four
c) five
d) six - -C: five
Ref: Tbl. 314.16(A)
-Determine the MINIMUM number of 15-ampere, 120-volt general
lighting branch-circuits required for a dwelling that has 2,600 square
feet of habitable space.
a) three
b) four
c) five
d) six - -C: five
Ref: 220.12; Tbl. 220.12
Sol:
2,600 sq. ft. x 3 VA = 7,800 VA (total lighting VA of house)
120 volts x 15 amperes = 1,800 VA (one circuit)
7,800 VA (house)/1,800 VA (one circuit) = 4.3 = 5 circuits
-When calculating the total load on a dwelling unit, how many VA per
square feet must be included for the general purpose receptacle
outlets?
a) none
b) one
c) two
d) three - -A: none
Ref: 220.14(J)(1)
-When calculating the total load for a dwelling unit, what is the
MINIMUM load, in VA, that must be added for the two required small
appliance branch-circuits?
a) 1,200 VA
b) 1,500 VA
c) 2,400 VA
d) 3,000 VA - -D: 3,000 VA
Ref: 220.52(A)
Sol:
1,500VA x 2 circuits required = 3,000VA
-It shall be permissible to apply a demand factor of _____ percent to the
nameplate-rating load of four or more fastened in place electric water
heaters in a multi-family dwelling unit.
a) 50
b) 75
c) 80
d) 90 - -B: 75
25Questions with Complete
Correct Answers/Rated A+ and
100% Accurate
What is the MAXIMUM allowable cord length for the cord supplying a
cord-and-plug connected dishwasher installed under a kitchen counter
in a dwelling unit?
a) 11⁄2 feet
b) 2 feet
c) 3 feet
d) 4 feet - -D: 4 feet
Ref: 422.16(B)(2)(2)
-What is the MINIMUM size copper SE cable with type THHW insulation
that may be used as ungrounded, service-entrance phase conductors for
a 150 ampere-rated, 120/240-volt, singlephase, residential service?
a) 1/0 AWG
b) 1 AWG
c) 2 AWG
d) 3 AWG - -B: 1 AWG
Ref: Tbl. 310.15(B)(6)
-For outlet boxes designed to support ceiling-suspended (paddle) fans
that weigh more than _____ pounds, the required marking shall include
the maximum weight to be supported.
a) 20
b) 30
c) 35
d) 70 - -C: 35
Ref: 314.27(D)
-A connection to a driven or buried grounding electrode shall ______.
a) be accessible
b) not be required to be accessible
c) not permitted to be buried
d) be visible - -B: not be required to be accessible
Ref: 250.68(A), Ex.1
-What is the MAXIMUM allowable standard size circuit breaker rating
that may be used to protect a size 8 AWG copper NM-B cable supplying
an electric range?
a) 30 amperes
b) 40 amperes
c) 50 amperes
d) 60 amperes - -B: 40 amperes
, Ref: 334.80; Tbl. 310.16
-The MAXIMUM number of size 10 AWG conductors permitted in a 4
inch x 11⁄4 inch octagon metal junction box is _____.
a) two
b) four
c) five
d) six - -C: five
Ref: Tbl. 314.16(A)
-Determine the MINIMUM number of 15-ampere, 120-volt general
lighting branch-circuits required for a dwelling that has 2,600 square
feet of habitable space.
a) three
b) four
c) five
d) six - -C: five
Ref: 220.12; Tbl. 220.12
Sol:
2,600 sq. ft. x 3 VA = 7,800 VA (total lighting VA of house)
120 volts x 15 amperes = 1,800 VA (one circuit)
7,800 VA (house)/1,800 VA (one circuit) = 4.3 = 5 circuits
-When calculating the total load on a dwelling unit, how many VA per
square feet must be included for the general purpose receptacle
outlets?
a) none
b) one
c) two
d) three - -A: none
Ref: 220.14(J)(1)
-When calculating the total load for a dwelling unit, what is the
MINIMUM load, in VA, that must be added for the two required small
appliance branch-circuits?
a) 1,200 VA
b) 1,500 VA
c) 2,400 VA
d) 3,000 VA - -D: 3,000 VA
Ref: 220.52(A)
Sol:
1,500VA x 2 circuits required = 3,000VA
-It shall be permissible to apply a demand factor of _____ percent to the
nameplate-rating load of four or more fastened in place electric water
heaters in a multi-family dwelling unit.
a) 50
b) 75
c) 80
d) 90 - -B: 75
