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 caulking or grouting new tiles? CORRECT ANSWER 24-48 Hours How long should you wait before installing tile on a shower pan? – CORRECT ANSWER 24 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 ANSWER Type-B Soils If 65 street lights are fed by a 2275 volt series circuit, what is the voltage across each light? – CORRECT ANSWER 35V 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 ANSWER 1:1 (45°) A Pittsburgh 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 building 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 right to call: – CORRECT ANSWER Cal/OSHA or DOSH When installing a door jamb, you need shims at: – CORRECT ANSWER Both hinge and strike sides, three on each side. Which of the fol
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