CSLB B EXAMS COMPREHENSIVE EXAM 2026
FULL SOLUTION QUESTIONS AND ANSWERS
◉ The minimum size vent for a water closet is: Answer: 1 1/2"
minimum vent size for a water closet.
◉ Which tool would you use to apply mortar 1/2" thick? Answer:
Trowel
◉ When preparing plaster for a ceiling, which quantity is most
important to monitor in the mixture? Answer: Water
◉ In a work space, travel distance to a fire extinguisher must not be
more than how many feet? Answer: 75' is the maximum travel
distance to a fire extinguisher in a work space.
◉ What sort of subfloor material would you use if the edges meet
over the floor joist? Answer: Plywood
◉ In framing, a look out is a(n): Answer: Cantilevered beam
◉ When would you wet brick masonry? Answer: Before building a
brick wall in warm weather.
,◉ Which of the following does NOT need a fixed lighting outlet?
A. Bedroom ceiling
B. Furnace space and attic
C. Stairway
D. Exterior door Answer: Exterior door
◉ How many days should you wait between the brown coat and the
finish coat when plastering? Answer: 7 days between BROWN coat
and the FINISH coat.
◉ How many days in advance must you notify authorities before
digging an excavation 5' deep into which a worker must go? Answer:
2 days
◉ How do you decide which metal bracket to use? Answer: Per
specification in the construction documents.
◉ How would you best determine if a soil is expansive? Answer:
Have the soil tested
◉ Where would be the best place to look for a roof leak? Answer:
Valley flashings are the best place to look for a roof leak.
,◉ What is the purpose of a condenser line for a furnace vent fan?
Answer: Help remove accumulated water in the vent.
◉ What is a register used for? Answer: A register is used to supply
air.
◉ The safety valve on a portable air compressor should be popped
at least: Answer: The safety valve on a portable air compressor
should be popped at least weekly.
◉ Which of the following materials is acceptable for interior gas
lines?
A. Copper
B. PVC
C. Iron or steel
D. ABS Answer: Iron or steel is acceptable for interior gas lines.
◉ If a circular slab is a 45' in diameter, how much surface area does
it cover? Answer: Over 1,500 feet
, ◉ What material do you use to clean brushes and spills when
painting with alkyd (oil) paints? Answer: Paint thinner is to be used
to clean up oil based paints and stains.
◉ Fiberglass insulation for walls should be attached to:
A. The interior of the studs
B. The face of the studs
C. The top and bottom of the studs
D. There is no need to attach Answer: There is no need to attach.
◉ Basement concrete walls should have a minimum test PSI at 30
days of: Answer: A basement concrete wall should have a minimum
of 3000 psi after 30 days.
◉ The term Ufer is associated with which trade?
A. Roofing
B. Plumbing
C. Plastering
D. Electrical Answer: Electrical
FULL SOLUTION QUESTIONS AND ANSWERS
◉ The minimum size vent for a water closet is: Answer: 1 1/2"
minimum vent size for a water closet.
◉ Which tool would you use to apply mortar 1/2" thick? Answer:
Trowel
◉ When preparing plaster for a ceiling, which quantity is most
important to monitor in the mixture? Answer: Water
◉ In a work space, travel distance to a fire extinguisher must not be
more than how many feet? Answer: 75' is the maximum travel
distance to a fire extinguisher in a work space.
◉ What sort of subfloor material would you use if the edges meet
over the floor joist? Answer: Plywood
◉ In framing, a look out is a(n): Answer: Cantilevered beam
◉ When would you wet brick masonry? Answer: Before building a
brick wall in warm weather.
,◉ Which of the following does NOT need a fixed lighting outlet?
A. Bedroom ceiling
B. Furnace space and attic
C. Stairway
D. Exterior door Answer: Exterior door
◉ How many days should you wait between the brown coat and the
finish coat when plastering? Answer: 7 days between BROWN coat
and the FINISH coat.
◉ How many days in advance must you notify authorities before
digging an excavation 5' deep into which a worker must go? Answer:
2 days
◉ How do you decide which metal bracket to use? Answer: Per
specification in the construction documents.
◉ How would you best determine if a soil is expansive? Answer:
Have the soil tested
◉ Where would be the best place to look for a roof leak? Answer:
Valley flashings are the best place to look for a roof leak.
,◉ What is the purpose of a condenser line for a furnace vent fan?
Answer: Help remove accumulated water in the vent.
◉ What is a register used for? Answer: A register is used to supply
air.
◉ The safety valve on a portable air compressor should be popped
at least: Answer: The safety valve on a portable air compressor
should be popped at least weekly.
◉ Which of the following materials is acceptable for interior gas
lines?
A. Copper
B. PVC
C. Iron or steel
D. ABS Answer: Iron or steel is acceptable for interior gas lines.
◉ If a circular slab is a 45' in diameter, how much surface area does
it cover? Answer: Over 1,500 feet
, ◉ What material do you use to clean brushes and spills when
painting with alkyd (oil) paints? Answer: Paint thinner is to be used
to clean up oil based paints and stains.
◉ Fiberglass insulation for walls should be attached to:
A. The interior of the studs
B. The face of the studs
C. The top and bottom of the studs
D. There is no need to attach Answer: There is no need to attach.
◉ Basement concrete walls should have a minimum test PSI at 30
days of: Answer: A basement concrete wall should have a minimum
of 3000 psi after 30 days.
◉ The term Ufer is associated with which trade?
A. Roofing
B. Plumbing
C. Plastering
D. Electrical Answer: Electrical
