GC Exam - B License Questions With
Complete Solutions
What is a drip loop as it relates to electricity? Correct Answers
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When a service conductor enters a building and is looped to
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help keep moisture out of the service head
What is the minimum size anchor bolt used to anchor sill plates
to a foundation? Correct Answers 1/2"
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What does "Grade 60" represent in horizontal rebar? Correct
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Answers Tensile strength. GRADE 60 has a yield strength of
hh
60,000 psi.
What is the minimum distance a smoke detector can be from a
bathroom door? Correct Answers 3'
hh hh
In cold climates, how do you prevent newly poured concrete
from freezing and losing strength? Correct Answers cover it
hh hh
What should you do if you find roots while digging for a footing
and slab? Correct Answers Clear roots at least 12" in all
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directions from the footing or slab
In electrical installation what is another term for resistance?
Correct Answers Ohms
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What is the minimum size of anchor bolt can be used in seismic
category E? Correct Answers #5
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,Which of the following wires is the neutral wire? Correct
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Answers White
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What is the maximum spacing of control joints in driveways?
Correct Answers 20'. The control joints in driveways should be
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spaced equal to the width of the slab, but the maximum
permissible spacing is 20 feet.
What is the minimum depth rigid metal conduit can be installed
under residential driveways? Correct Answers 18". According
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to the NEC table 300.5, Rigid Metal Conduit should be installed
18 inches underground assuming a one- and two- family
dwelling driveway and outdoor parking areas, and used only for
dwelling-related purposes.
Metal enclosures that house service conductors must be: Correct
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Answers grounded
hh
What does the # symbol (gage number) on a self-drilling screw
represent? Correct Answers Thread diameter
hh hh
To ensure proper grounding, the grounding electrode must be
encased by how many inches of concrete? Correct Answers 2".
hh hh
To ensure proper grounding, the electrode must meet the
following criteria: -Must be encased by 2 or more inches of
concrete-Electrode must be at or near the bottom of the footing
or foundation-Concrete must be in contact with the ground -At
least 20 feet of rebar that is at least ½" thick or 20 feet of solid
copper as a conductor
,For quick dry applications you would most commonly use
which kind of concrete? Correct Answers Type 3
hh hh
The main field of the slab must be reinforced with an ___ by
___ grid. Correct Answers 18"x18"
hh hh
What size of footing required for a 2-story building with a load
bearing value of 1,500psf? Correct Answers 15"
hh hh
Which of the following is a normal curing temperature for
concrete? Correct Answers The normal curing temperature is
hh hh
75°F. Most manufacturers specify a range between 50 and 85°F.
When should you wet concrete masonry units? Correct Answers hh
Never
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What is the major difference between a plug fuse and a cartridge
fuse? Correct Answers Voltage use
hh hh
What is the maximum spacing of the anchor bolts for 1-story
house? Correct Answers 6'
hh hh
Where are spiral rebar ties used? Correct Answers Round
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columns
What must be done if you find exposed live wires above 600
volts in a building? Correct Answers Restrict access with a lock
hh hh
Section 310.34(C) of the NEC states that the entrance to all
buildings, vaults, rooms, or enclosures containing exposed live
parts or exposed conductors operating at over 600 volts,
nominal, shall be kept locked unless such entrances are under
, the observation of a qualified person at all times. Where the
voltage exceeds 600 volts, nominal, permanent and conspicuous
warning signs shall be provided, reading as follows:
DANGER — HIGH VOLTAGE — KEEP OUT
When wiring a house, what is the rated voltage to ground if the
circuit breaker has a slash rating of 120/240 volts? Correct
hh
Answers 120-V to ground
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The anchor bolt must be embedded ___ into the slab. Correct hh
Answers 7"
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What is the concrete mixture ratio of 1:2:4? Lean, Medium,
Standard, or Rich? Correct Answers Standard.
hh hh
The mixture ratio of 1:2:4 stands for 1 part cement, 2 parts of
sand or fine aggregate, and 4 parts of coarse aggregate. Here is
all of the mixture ratios: Lean 1:3:6Medium 1:2 ½:5Standard
1:2:4 Rich 1:2:3
What is "available fault current"? Correct Answers Maximum
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current available if a short circuit occurs
What size of rebar is used to reinforce stem wall? Correct
hh
Answers #4
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The code requires ½ inch rebar to be used in stem walls.
What is the smallest fixture wire allowed in a home? Correct hh
Answers No. 18 AWG..
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According to the Electrical Code, fixture wires cannot be
smaller than No. 18 AWG.
Complete Solutions
What is a drip loop as it relates to electricity? Correct Answers
hh
When a service conductor enters a building and is looped to
hh
help keep moisture out of the service head
What is the minimum size anchor bolt used to anchor sill plates
to a foundation? Correct Answers 1/2"
hh hh
What does "Grade 60" represent in horizontal rebar? Correct
hh
Answers Tensile strength. GRADE 60 has a yield strength of
hh
60,000 psi.
What is the minimum distance a smoke detector can be from a
bathroom door? Correct Answers 3'
hh hh
In cold climates, how do you prevent newly poured concrete
from freezing and losing strength? Correct Answers cover it
hh hh
What should you do if you find roots while digging for a footing
and slab? Correct Answers Clear roots at least 12" in all
hh hh
directions from the footing or slab
In electrical installation what is another term for resistance?
Correct Answers Ohms
hh hh
What is the minimum size of anchor bolt can be used in seismic
category E? Correct Answers #5
hh hh
,Which of the following wires is the neutral wire? Correct
hh
Answers White
hh
What is the maximum spacing of control joints in driveways?
Correct Answers 20'. The control joints in driveways should be
hh hh
spaced equal to the width of the slab, but the maximum
permissible spacing is 20 feet.
What is the minimum depth rigid metal conduit can be installed
under residential driveways? Correct Answers 18". According
hh hh
to the NEC table 300.5, Rigid Metal Conduit should be installed
18 inches underground assuming a one- and two- family
dwelling driveway and outdoor parking areas, and used only for
dwelling-related purposes.
Metal enclosures that house service conductors must be: Correct
hh
Answers grounded
hh
What does the # symbol (gage number) on a self-drilling screw
represent? Correct Answers Thread diameter
hh hh
To ensure proper grounding, the grounding electrode must be
encased by how many inches of concrete? Correct Answers 2".
hh hh
To ensure proper grounding, the electrode must meet the
following criteria: -Must be encased by 2 or more inches of
concrete-Electrode must be at or near the bottom of the footing
or foundation-Concrete must be in contact with the ground -At
least 20 feet of rebar that is at least ½" thick or 20 feet of solid
copper as a conductor
,For quick dry applications you would most commonly use
which kind of concrete? Correct Answers Type 3
hh hh
The main field of the slab must be reinforced with an ___ by
___ grid. Correct Answers 18"x18"
hh hh
What size of footing required for a 2-story building with a load
bearing value of 1,500psf? Correct Answers 15"
hh hh
Which of the following is a normal curing temperature for
concrete? Correct Answers The normal curing temperature is
hh hh
75°F. Most manufacturers specify a range between 50 and 85°F.
When should you wet concrete masonry units? Correct Answers hh
Never
hh
What is the major difference between a plug fuse and a cartridge
fuse? Correct Answers Voltage use
hh hh
What is the maximum spacing of the anchor bolts for 1-story
house? Correct Answers 6'
hh hh
Where are spiral rebar ties used? Correct Answers Round
hh hh
columns
What must be done if you find exposed live wires above 600
volts in a building? Correct Answers Restrict access with a lock
hh hh
Section 310.34(C) of the NEC states that the entrance to all
buildings, vaults, rooms, or enclosures containing exposed live
parts or exposed conductors operating at over 600 volts,
nominal, shall be kept locked unless such entrances are under
, the observation of a qualified person at all times. Where the
voltage exceeds 600 volts, nominal, permanent and conspicuous
warning signs shall be provided, reading as follows:
DANGER — HIGH VOLTAGE — KEEP OUT
When wiring a house, what is the rated voltage to ground if the
circuit breaker has a slash rating of 120/240 volts? Correct
hh
Answers 120-V to ground
hh
The anchor bolt must be embedded ___ into the slab. Correct hh
Answers 7"
hh
What is the concrete mixture ratio of 1:2:4? Lean, Medium,
Standard, or Rich? Correct Answers Standard.
hh hh
The mixture ratio of 1:2:4 stands for 1 part cement, 2 parts of
sand or fine aggregate, and 4 parts of coarse aggregate. Here is
all of the mixture ratios: Lean 1:3:6Medium 1:2 ½:5Standard
1:2:4 Rich 1:2:3
What is "available fault current"? Correct Answers Maximum
hh hh
current available if a short circuit occurs
What size of rebar is used to reinforce stem wall? Correct
hh
Answers #4
hh
The code requires ½ inch rebar to be used in stem walls.
What is the smallest fixture wire allowed in a home? Correct hh
Answers No. 18 AWG..
hh
According to the Electrical Code, fixture wires cannot be
smaller than No. 18 AWG.
