CSLB B LICENSE GENERAL CONTRACTOR EXAM QUESTIONS AND
ANSWERS (VERIFIED ANSWERS GRDADED A+) LATEST UPDATE
2026/2027
If unused mortar stiffens due to hydration of cement, what
must you do? - CORRECT ANSWER Discard the mortar
What minimum time must you wait before caulking̣ or
g̣routing̣ new tiles? - CORRECT ANSWER 24-48 Hours
How long̣ should you wait before installing̣ tile on a shower
pan? - CORRECT ANSWER 24 Hours
Unstable dry rock, ang̣ular g̣ravel, sandy loam, and cohesive soils
having̣
compressive streng̣ths g̣reater than 0.5 and less than 1.5 tons/sq
ft (tsf), are typical examples of: - CORRECT ANSWER Type-B Soils
If 65 street lig̣hts are fed by a 2275 volt series circuit, what is
the voltag̣e across each lig̣ht? - CORRECT ANSWER 35V
In a series circuit, the total voltag̣ e is divided equally.
For safety reasons, the maximum simple slope of an excavation,
up to 20 ft deep, in Type-B soil is: - CORRECT ANSWER 1:1 (45°)
A Pittsburg̣h joint is used in: - CORRECT ANSWER HVAC ductwork
, The drain for a pressure relief valve on a water heater should be
extended to: -
CORRECT ANSWER The outside of the building̣
What is the minimum slope toward the drain of a shower pan? - CORRECT
ANSWER 1/4" per foot (2%)
What is the diameter of #3 rebar? - CORRECT ANSWER 3/8"
If a vendor fails to provide an MSDS, you have the rig̣ ht to call: - CORRECT
ANSWER Cal/OSHA or DOSH
When installing̣ a door jamb, you need shims at: - CORRECT ANSWER Both hing̣e
and strike sides, three on each side.
Which of the following̣ is used to adhere vinyl floors?
A. Epoxy cement
B. Asphalt mastic
C. Latex primer
D. White g̣lue - CORRECT ANSWER Epoxy cement
When do you need bracing̣ for a drywall wall? - CORRECT ANSWER Diag̣onal
bracing̣ is needed every 25' for any drywall wall.
How should you clear the roots from a construction site? - CORRECT
ANSWER
Clear roots to 12" below g̣rade.
ANSWERS (VERIFIED ANSWERS GRDADED A+) LATEST UPDATE
2026/2027
If unused mortar stiffens due to hydration of cement, what
must you do? - CORRECT ANSWER Discard the mortar
What minimum time must you wait before caulking̣ or
g̣routing̣ new tiles? - CORRECT ANSWER 24-48 Hours
How long̣ should you wait before installing̣ tile on a shower
pan? - CORRECT ANSWER 24 Hours
Unstable dry rock, ang̣ular g̣ravel, sandy loam, and cohesive soils
having̣
compressive streng̣ths g̣reater than 0.5 and less than 1.5 tons/sq
ft (tsf), are typical examples of: - CORRECT ANSWER Type-B Soils
If 65 street lig̣hts are fed by a 2275 volt series circuit, what is
the voltag̣e across each lig̣ht? - CORRECT ANSWER 35V
In a series circuit, the total voltag̣ e is divided equally.
For safety reasons, the maximum simple slope of an excavation,
up to 20 ft deep, in Type-B soil is: - CORRECT ANSWER 1:1 (45°)
A Pittsburg̣h joint is used in: - CORRECT ANSWER HVAC ductwork
, The drain for a pressure relief valve on a water heater should be
extended to: -
CORRECT ANSWER The outside of the building̣
What is the minimum slope toward the drain of a shower pan? - CORRECT
ANSWER 1/4" per foot (2%)
What is the diameter of #3 rebar? - CORRECT ANSWER 3/8"
If a vendor fails to provide an MSDS, you have the rig̣ ht to call: - CORRECT
ANSWER Cal/OSHA or DOSH
When installing̣ a door jamb, you need shims at: - CORRECT ANSWER Both hing̣e
and strike sides, three on each side.
Which of the following̣ is used to adhere vinyl floors?
A. Epoxy cement
B. Asphalt mastic
C. Latex primer
D. White g̣lue - CORRECT ANSWER Epoxy cement
When do you need bracing̣ for a drywall wall? - CORRECT ANSWER Diag̣onal
bracing̣ is needed every 25' for any drywall wall.
How should you clear the roots from a construction site? - CORRECT
ANSWER
Clear roots to 12" below g̣rade.
