CSLB B LICENSE GENERAL CONTRACTOR
EXAM Latest Update 2025-2026 Exam 330
Questions with 100% Verified Correct Answers
Guaranteed A+
A "Tee-Wye" is a:
A. Plumbing fitting
B. Electrical wire
C. Type of saw
D. Type of wood - CORRECT ANSWER: A tee-wye is a plumbing fitting.
A 6x6: #10, or 6x6: 10/10, wire mesh is used on a: - CORRECT ANSWER: A slab on
grade
A collar beam is a? - CORRECT ANSWER: A horizontal member that ties opposite
rafters together.
A curb and threshold are not necessary in a shower:
A. Where children use it
B. For drain water
C. When designed for wheel chair use
D. Curbs and thresholds are always required - CORRECT ANSWER: A curb and
threshold is not required when designed for wheel chair use.
A Freon recovery system is NOT required when:
A. Recharging a small appliance
,B. Replacing a burnt out rotor in a hermetic unit
C. Overhauling a rooftop A/C unit
D. Scrapping an old refrigeration unit - CORRECT ANSWER: A freon recovery system
would not be required when recharging a small appliance.
A Freon recovery system is required when:
A. Replacing a burnt out rotor in a hermetic unit
B. Overhauling a rooftop A/C unit
C. Scrapping an old refrigeration unit
D. All of the above - CORRECT ANSWER: All of the above
A material CANNOT be classified as Type-A soil if it is fissured, previously disturbed, or:
A. Subject to vibration from heavy traffic or pile driving
B. Contains a large proportion of clay material
C. Contains caliche or hardpan
D. Has a high compressive strength - CORRECT ANSWER: Type A soil can not be
fissured, previously disturbed or subject to vibration from heavy traffic or pile driving.
A Pittsburgh joint is used in: - CORRECT ANSWER: HVAC ductwork
A self-closing door is best for a doorway between: - CORRECT ANSWER: Kitchen and
garage.
A stairway's maximum total riser and tread dimension would be:
A. 1 riser + 2 treads = 22"
B. 2 risers + 1 tread = 25"
,C. 2 treads + 1 riser = 25"
D. Dependent on customer's request - CORRECT ANSWER: 2 risers + 1 tread = 25"
A stove unit without insulation must be how many inches away from combustible
materials? - CORRECT ANSWER: An uninsulated stove unit must be at least 6" away
from combustible materials.
A waste water pipe, or DWV ( Drain-Waste-Vent), can have an outlet into any of the
following EXCEPT a:
A. Sanitary Drain
B. Sewer
C. Natural Pond
D. Septic tank, seepage pit, or cesspool. - CORRECT ANSWER: Natural Pond
According to Energy Efficiency Standards, general lighting in kitchens must have an
efficacy of at least how many lumens per watt? - CORRECT ANSWER: Lighting in a
kitchen must have at least 40 lumbers per watt.
According to the UBC, the minimum clearance from a masonry fireplace to wood
framing members is? - CORRECT ANSWER: 2" is the minimum clearance from a
masonry fireplace to wood framing members.
According to the UBC, what is the proper height of a handrail for a stairway? -
CORRECT ANSWER: A handrail for a stairway must be at least 34" high and no more
than 38".
After drywall has been screwed into place, when do you check the placement of the
screws? - CORRECT ANSWER: Before taping.
An ammeter is used in ________ with a(n) _________ circuit:
, A. series, energized
B. series, de-energized
C. parallel, energized
D. paralle, de-energized - CORRECT ANSWER: An ammeter is used in series with an
energized circut.
An excavation project requires a contractor to dig a trench near a utility line. What is the
proper procedure? - CORRECT ANSWER: Contact the utility company before digging.
An owner typically holds 10% retention from progress payments because? - CORRECT
ANSWER: As protection against mechanics liens.
An underground utility line is marked with paint. What is the minimum distance
mechanical excavating equipment must stay from the paint mark? - CORRECT
ANSWER: 24" is the minimum distance mechanical excavating equipment must stay
from utility paint marks.
Approximately, how many 4" x 4" ceramic tiles would you need to tile a 30" x 60" shower
pan and three walls 5' high? Use 1/4" grout lines, assume no curb, and allow 15% for
waste.
A. 439
B. 574
C. 720
D. 800 - CORRECT ANSWER: 574
At an excavation, an Underground Service Alert (U.S.A) marking on the dirt that uses
red paint or chalk meCORRECT ANSWER: - CORRECT ANSWER: Electric power
Basement concrete walls should have a minimum test PSI at 30 days of: - CORRECT
ANSWER: A basement concrete wall should have a minimum of 3000 psi after 30 days.
EXAM Latest Update 2025-2026 Exam 330
Questions with 100% Verified Correct Answers
Guaranteed A+
A "Tee-Wye" is a:
A. Plumbing fitting
B. Electrical wire
C. Type of saw
D. Type of wood - CORRECT ANSWER: A tee-wye is a plumbing fitting.
A 6x6: #10, or 6x6: 10/10, wire mesh is used on a: - CORRECT ANSWER: A slab on
grade
A collar beam is a? - CORRECT ANSWER: A horizontal member that ties opposite
rafters together.
A curb and threshold are not necessary in a shower:
A. Where children use it
B. For drain water
C. When designed for wheel chair use
D. Curbs and thresholds are always required - CORRECT ANSWER: A curb and
threshold is not required when designed for wheel chair use.
A Freon recovery system is NOT required when:
A. Recharging a small appliance
,B. Replacing a burnt out rotor in a hermetic unit
C. Overhauling a rooftop A/C unit
D. Scrapping an old refrigeration unit - CORRECT ANSWER: A freon recovery system
would not be required when recharging a small appliance.
A Freon recovery system is required when:
A. Replacing a burnt out rotor in a hermetic unit
B. Overhauling a rooftop A/C unit
C. Scrapping an old refrigeration unit
D. All of the above - CORRECT ANSWER: All of the above
A material CANNOT be classified as Type-A soil if it is fissured, previously disturbed, or:
A. Subject to vibration from heavy traffic or pile driving
B. Contains a large proportion of clay material
C. Contains caliche or hardpan
D. Has a high compressive strength - CORRECT ANSWER: Type A soil can not be
fissured, previously disturbed or subject to vibration from heavy traffic or pile driving.
A Pittsburgh joint is used in: - CORRECT ANSWER: HVAC ductwork
A self-closing door is best for a doorway between: - CORRECT ANSWER: Kitchen and
garage.
A stairway's maximum total riser and tread dimension would be:
A. 1 riser + 2 treads = 22"
B. 2 risers + 1 tread = 25"
,C. 2 treads + 1 riser = 25"
D. Dependent on customer's request - CORRECT ANSWER: 2 risers + 1 tread = 25"
A stove unit without insulation must be how many inches away from combustible
materials? - CORRECT ANSWER: An uninsulated stove unit must be at least 6" away
from combustible materials.
A waste water pipe, or DWV ( Drain-Waste-Vent), can have an outlet into any of the
following EXCEPT a:
A. Sanitary Drain
B. Sewer
C. Natural Pond
D. Septic tank, seepage pit, or cesspool. - CORRECT ANSWER: Natural Pond
According to Energy Efficiency Standards, general lighting in kitchens must have an
efficacy of at least how many lumens per watt? - CORRECT ANSWER: Lighting in a
kitchen must have at least 40 lumbers per watt.
According to the UBC, the minimum clearance from a masonry fireplace to wood
framing members is? - CORRECT ANSWER: 2" is the minimum clearance from a
masonry fireplace to wood framing members.
According to the UBC, what is the proper height of a handrail for a stairway? -
CORRECT ANSWER: A handrail for a stairway must be at least 34" high and no more
than 38".
After drywall has been screwed into place, when do you check the placement of the
screws? - CORRECT ANSWER: Before taping.
An ammeter is used in ________ with a(n) _________ circuit:
, A. series, energized
B. series, de-energized
C. parallel, energized
D. paralle, de-energized - CORRECT ANSWER: An ammeter is used in series with an
energized circut.
An excavation project requires a contractor to dig a trench near a utility line. What is the
proper procedure? - CORRECT ANSWER: Contact the utility company before digging.
An owner typically holds 10% retention from progress payments because? - CORRECT
ANSWER: As protection against mechanics liens.
An underground utility line is marked with paint. What is the minimum distance
mechanical excavating equipment must stay from the paint mark? - CORRECT
ANSWER: 24" is the minimum distance mechanical excavating equipment must stay
from utility paint marks.
Approximately, how many 4" x 4" ceramic tiles would you need to tile a 30" x 60" shower
pan and three walls 5' high? Use 1/4" grout lines, assume no curb, and allow 15% for
waste.
A. 439
B. 574
C. 720
D. 800 - CORRECT ANSWER: 574
At an excavation, an Underground Service Alert (U.S.A) marking on the dirt that uses
red paint or chalk meCORRECT ANSWER: - CORRECT ANSWER: Electric power
Basement concrete walls should have a minimum test PSI at 30 days of: - CORRECT
ANSWER: A basement concrete wall should have a minimum of 3000 psi after 30 days.
