CSLB B LICENSE GENERAL
CONTRACTOR EXAM QUESTIONS
AND CORRECT DETAILED ANSWERS
WITH RATIONALES,.
If unused mortar stiffens due to hydration of cement, what must you
do? - Correct answerDiscard the mortar
What minimum time must you wait before caulking or grouting new
tiles? - Correct answer24-48 Hours
How long should you wait before installing tile on a shower pan? -
Correct answer24 Hours
Unstable dry rock, angular gravel, sandy loam, and cohesive soils
having compressive strengths greater than 0.5 and less than 1.5
tons/sq ft (tsf), are typical examples of: - Correct answerType-B
Soils
If 65 street lights are fed by a 2275 volt series circuit, what is the
voltage across each light? - Correct answer35V
In a series circuit, the total voltage is divided equally.
For safety reasons, the maximum simple slope of an excavation, up to
20 ft deep, in Type-B soil is: - Correct answer1:1 (45°)
A Pittsburgh joint is used in: - Correct answerHVAC ductwork
The drain for a pressure relief valve on a water heater should be
extended to: - Correct answerThe outside of the building
,What is the minimum slope toward the drain of a shower pan? -
Correct answer1/4" per foot (2%)
What is the diameter of #3 rebar? - Correct answer3/8"
If a vendor fails to provide an MSDS, you have the right to call: -
Correct answerCal/OSHA or DOSH
When installing a door jamb, you need shims at: - Correct
answerBoth hinge and strike sides, three on each side.
Which of the following is used to adhere vinyl floors?
A. Epoxy cement
B. Asphalt mastic
C. Latex primer
D. White glue - Correct answerEpoxy cement
When do you need bracing for a drywall wall? - Correct
answerDiagonal bracing is needed every 25' for any drywall wall.
How should you clear the roots from a construction site? - Correct
answerClear roots to 12" below grade.
Dividing watts by amps gives you: - Correct answerVolts
The most frequent on-the-job roofing accidents are: - Correct
answerFalls
Which of the following is NOT a type of wood block flooring?
A. Parquet
B. Wood Mosaic
C. Wood Tile
D. All of the above. - Correct answerWood tile
,Lightweight concrete is best used for:
A. Curb and Gutter
B. Second floor decking
C. First floor slab on grade
D. Footings - Correct answerSecond floor decking
The tool used to carry grout needed to patch a small hole is a:
A. Hawk
B. Poling board
C. Spot board
D. Mason's scutch - Correct answerSpot Board
Which pipe is NOT appropriate for industrial wastes?
A. Cast iron
B. Schedule 40 ABS DWV
C. Extra strength vitrified clay
D. Copper - Correct answerCopper
Where do you need a fire wall?
A. Between a living room and a bedroom
B. Between a bedroom and a bathroom
C. Between a kitchen and a bath
D. A separation wall between a dwelling and an attachment -
Correct answerA separation wall between a dwelling and an
attachment.
What is the minimum clearance between rough ground and untreated
subfloor joists? - Correct answer18 inches
Who may remove asbestos? - Correct answerContractor with
Asbestos Certification on license.
, Which of the following is NOT likely to be found in significant
proportions in granular soil?
A. Gravel
B. Sand
C. Silt
D. Clay - Correct answerClay
Stiles and rails are used on which of the following?
A. Furred walls
B. Roofs
C. Windows
D. Slabs - Correct answerWindows.
A stile is the vertical edges of the window and the rails are the bottom
and top.
What does a high slump test indicate? - Correct answerToo much
water.
Metal concrete forms should be?
A. Oiled
B. Watered
C. Placed against gravel
D. Discarded after each use - Correct answerOiled
What does the R mean in a description of insulation? - Correct
answerResistance
What kind of door would you install for someone with a disability?
A. Automatic with minimum of 3 seconds to close
B. Automatic with maximum of 5 seconds to open
C. Manual with maximum of 8.5 pounds to operate
D. Either A or C - Correct answerEither A or C
CONTRACTOR EXAM QUESTIONS
AND CORRECT DETAILED ANSWERS
WITH RATIONALES,.
If unused mortar stiffens due to hydration of cement, what must you
do? - Correct answerDiscard the mortar
What minimum time must you wait before caulking or grouting new
tiles? - Correct answer24-48 Hours
How long should you wait before installing tile on a shower pan? -
Correct answer24 Hours
Unstable dry rock, angular gravel, sandy loam, and cohesive soils
having compressive strengths greater than 0.5 and less than 1.5
tons/sq ft (tsf), are typical examples of: - Correct answerType-B
Soils
If 65 street lights are fed by a 2275 volt series circuit, what is the
voltage across each light? - Correct answer35V
In a series circuit, the total voltage is divided equally.
For safety reasons, the maximum simple slope of an excavation, up to
20 ft deep, in Type-B soil is: - Correct answer1:1 (45°)
A Pittsburgh joint is used in: - Correct answerHVAC ductwork
The drain for a pressure relief valve on a water heater should be
extended to: - Correct answerThe outside of the building
,What is the minimum slope toward the drain of a shower pan? -
Correct answer1/4" per foot (2%)
What is the diameter of #3 rebar? - Correct answer3/8"
If a vendor fails to provide an MSDS, you have the right to call: -
Correct answerCal/OSHA or DOSH
When installing a door jamb, you need shims at: - Correct
answerBoth hinge and strike sides, three on each side.
Which of the following is used to adhere vinyl floors?
A. Epoxy cement
B. Asphalt mastic
C. Latex primer
D. White glue - Correct answerEpoxy cement
When do you need bracing for a drywall wall? - Correct
answerDiagonal bracing is needed every 25' for any drywall wall.
How should you clear the roots from a construction site? - Correct
answerClear roots to 12" below grade.
Dividing watts by amps gives you: - Correct answerVolts
The most frequent on-the-job roofing accidents are: - Correct
answerFalls
Which of the following is NOT a type of wood block flooring?
A. Parquet
B. Wood Mosaic
C. Wood Tile
D. All of the above. - Correct answerWood tile
,Lightweight concrete is best used for:
A. Curb and Gutter
B. Second floor decking
C. First floor slab on grade
D. Footings - Correct answerSecond floor decking
The tool used to carry grout needed to patch a small hole is a:
A. Hawk
B. Poling board
C. Spot board
D. Mason's scutch - Correct answerSpot Board
Which pipe is NOT appropriate for industrial wastes?
A. Cast iron
B. Schedule 40 ABS DWV
C. Extra strength vitrified clay
D. Copper - Correct answerCopper
Where do you need a fire wall?
A. Between a living room and a bedroom
B. Between a bedroom and a bathroom
C. Between a kitchen and a bath
D. A separation wall between a dwelling and an attachment -
Correct answerA separation wall between a dwelling and an
attachment.
What is the minimum clearance between rough ground and untreated
subfloor joists? - Correct answer18 inches
Who may remove asbestos? - Correct answerContractor with
Asbestos Certification on license.
, Which of the following is NOT likely to be found in significant
proportions in granular soil?
A. Gravel
B. Sand
C. Silt
D. Clay - Correct answerClay
Stiles and rails are used on which of the following?
A. Furred walls
B. Roofs
C. Windows
D. Slabs - Correct answerWindows.
A stile is the vertical edges of the window and the rails are the bottom
and top.
What does a high slump test indicate? - Correct answerToo much
water.
Metal concrete forms should be?
A. Oiled
B. Watered
C. Placed against gravel
D. Discarded after each use - Correct answerOiled
What does the R mean in a description of insulation? - Correct
answerResistance
What kind of door would you install for someone with a disability?
A. Automatic with minimum of 3 seconds to close
B. Automatic with maximum of 5 seconds to open
C. Manual with maximum of 8.5 pounds to operate
D. Either A or C - Correct answerEither A or C
