CSLB Class B General Contractor's License - Building's Exam Core Trades (Part 2)
3 inches What is the minimum drain pipe size for the toilet in a residential home?
B) Fire protection contractor Who is licensed to install residential fire sprinkler systems?
A) Plumbing contractor
B) Fire protection contractor
C) General Building contractor
D) Pipeline contractor
C) Clean the surface using a power tool When brazing or soldering gas pipes during the installation of water heaters,
what is the best way to prepare the pipe?
A) Clean it with water
B) Blow into the pipe using your lungs
C) Clean the surface using a power tool
D) Use a pressurized air canister
D) Endless rope lift Which personal lift is not acceptable?
A) Scissor
B) Boom
C) Manual
D) Endless rope lift
B) To soften PVC pipe before applying PVC cement What is the purpose of PVC primer?
A) To glue PVC pipes to other materials
B) To soften PVC pipe before applying PVC cement
C) To prevent electrical shock
D) To help solder conduit or piping
C) Flashing What is the most common location to find a roof leak?
(Leaks are most common when two surfaces meet or A) Attic
around fenestration. Leaks are most prominent in valley B) Shingles
flashing and improperly installed window flashing.) C) Flashing
D) Collar tie
C) Pipe supports come into contact with metal piping What is the most common reason for noise in piping when a water fixture is
turned on or off?
(Mainly due to water hammer.)
A) Hot water was used
B) Cold water was used
C) Pipe supports come into contact with metal piping
D) The walls are not up to code causing pipe failure
C) Brass type If you send your employee to purchase a 2-inch water supply valve and they
return with a 1.5-inch supply valve, then what is the proper composition of the
valve?
A) The casing must be made of plastic
B) The employee must return and purchase a wrought iron valve
C) Brass type
D) The connection must be silver and body made of iron
10 When penetrating a roof with an exhaust, the exhaust must be no closer than
_____ feet to any air intake or openable window.
A) Class A Which roof assembly has the best fire rating?
A) Class A
B) Class B
C) Class I
D) Class III
, CSLB Class B General Contractor's License - Building's Exam Core Trades (Part 2)
D) Use of materials that are compatible with the type of What does material compatibility refer to when installing alternate water sources
pipe and fitting materials in existing plumbing systems?
A) Plumbing fixtures have to come from the same manufacturer
B) Only the couplings must be made of metal
C) All plumbing connections must be soldered or brazed
D) Use of materials that are compatible with the type of pipe and fitting materials
C) Weather seal, weather strip, and apply caulking When you have a gap in the building envelope, what do you do to prevent air
leakage?
A) Stuff insulation into gaps
B) Put caulking in and around the gaps
C) Weather seal, weather strip, and apply caulking
D) Nothing, all buildings require air leakage
18 inches In order to protect a water heater from damage, what is the minimum height it
should be from the floor of a garage?
4 How many plumbing fixtures can be vented by a single vertical wet-vent?
(According to the California Plumbing Code, the vertical
piping between two consecutive inlet levels shall be
considered a wet-vented section. Each wet-vented
section shall be not less than one pipe size exceeding
the required minimum waste pipe size of the upper
fixture or shall be one pipe size exceeding the required
minimum pipe size for the sum of the fixture units served
by such wet-vented section, whichever is larger, but no
case less than 2 inches.)
D) Inspect the tank and pump for mechanical problems After the construction of a new home you turn on the faucet in the kitchen and
the water pressure is extremely low, how should you proceed to test the
problem?
A) Call the inspector
B) Hire a plumbing contractor
C) Turn on the light switch
D) Inspect the tank and pump for mechanical problems
5/8" When drilling a 2 x 4 the minimum distance from the edge to the hole should be:
0.75 inches What is the minimum size a water supply pipe to a building?
Never When do you wet a concrete block during installation?
1/8 inch per foot What is the minimum slope of a finished shower floor?
Section 408.5 of the California Plumbing Code states
that the finished floor of the receptor should slope
uniformly from the sides towards the drain, not less than
1/8 inch per foot, nor more than 1/2 inch per foot. For
further clarification, the California Plumbing Code refers
to field-fabricated shower pans as "receptors." It is
important not to confuse the requirements in CPC 408.5
with CPC 408.7, which specifies that the lining materials
for showers and receptors should be pitched ¼ inch per
foot towards weep holes in the subdrain of a smooth and
solidly formed subbase.
A) Engineer Who is responsible for final approval of plans on a public works project?
A) Engineer
B) Homeowner
C) City
D) Contractor
3 inches What is the minimum drain pipe size for the toilet in a residential home?
B) Fire protection contractor Who is licensed to install residential fire sprinkler systems?
A) Plumbing contractor
B) Fire protection contractor
C) General Building contractor
D) Pipeline contractor
C) Clean the surface using a power tool When brazing or soldering gas pipes during the installation of water heaters,
what is the best way to prepare the pipe?
A) Clean it with water
B) Blow into the pipe using your lungs
C) Clean the surface using a power tool
D) Use a pressurized air canister
D) Endless rope lift Which personal lift is not acceptable?
A) Scissor
B) Boom
C) Manual
D) Endless rope lift
B) To soften PVC pipe before applying PVC cement What is the purpose of PVC primer?
A) To glue PVC pipes to other materials
B) To soften PVC pipe before applying PVC cement
C) To prevent electrical shock
D) To help solder conduit or piping
C) Flashing What is the most common location to find a roof leak?
(Leaks are most common when two surfaces meet or A) Attic
around fenestration. Leaks are most prominent in valley B) Shingles
flashing and improperly installed window flashing.) C) Flashing
D) Collar tie
C) Pipe supports come into contact with metal piping What is the most common reason for noise in piping when a water fixture is
turned on or off?
(Mainly due to water hammer.)
A) Hot water was used
B) Cold water was used
C) Pipe supports come into contact with metal piping
D) The walls are not up to code causing pipe failure
C) Brass type If you send your employee to purchase a 2-inch water supply valve and they
return with a 1.5-inch supply valve, then what is the proper composition of the
valve?
A) The casing must be made of plastic
B) The employee must return and purchase a wrought iron valve
C) Brass type
D) The connection must be silver and body made of iron
10 When penetrating a roof with an exhaust, the exhaust must be no closer than
_____ feet to any air intake or openable window.
A) Class A Which roof assembly has the best fire rating?
A) Class A
B) Class B
C) Class I
D) Class III
, CSLB Class B General Contractor's License - Building's Exam Core Trades (Part 2)
D) Use of materials that are compatible with the type of What does material compatibility refer to when installing alternate water sources
pipe and fitting materials in existing plumbing systems?
A) Plumbing fixtures have to come from the same manufacturer
B) Only the couplings must be made of metal
C) All plumbing connections must be soldered or brazed
D) Use of materials that are compatible with the type of pipe and fitting materials
C) Weather seal, weather strip, and apply caulking When you have a gap in the building envelope, what do you do to prevent air
leakage?
A) Stuff insulation into gaps
B) Put caulking in and around the gaps
C) Weather seal, weather strip, and apply caulking
D) Nothing, all buildings require air leakage
18 inches In order to protect a water heater from damage, what is the minimum height it
should be from the floor of a garage?
4 How many plumbing fixtures can be vented by a single vertical wet-vent?
(According to the California Plumbing Code, the vertical
piping between two consecutive inlet levels shall be
considered a wet-vented section. Each wet-vented
section shall be not less than one pipe size exceeding
the required minimum waste pipe size of the upper
fixture or shall be one pipe size exceeding the required
minimum pipe size for the sum of the fixture units served
by such wet-vented section, whichever is larger, but no
case less than 2 inches.)
D) Inspect the tank and pump for mechanical problems After the construction of a new home you turn on the faucet in the kitchen and
the water pressure is extremely low, how should you proceed to test the
problem?
A) Call the inspector
B) Hire a plumbing contractor
C) Turn on the light switch
D) Inspect the tank and pump for mechanical problems
5/8" When drilling a 2 x 4 the minimum distance from the edge to the hole should be:
0.75 inches What is the minimum size a water supply pipe to a building?
Never When do you wet a concrete block during installation?
1/8 inch per foot What is the minimum slope of a finished shower floor?
Section 408.5 of the California Plumbing Code states
that the finished floor of the receptor should slope
uniformly from the sides towards the drain, not less than
1/8 inch per foot, nor more than 1/2 inch per foot. For
further clarification, the California Plumbing Code refers
to field-fabricated shower pans as "receptors." It is
important not to confuse the requirements in CPC 408.5
with CPC 408.7, which specifies that the lining materials
for showers and receptors should be pitched ¼ inch per
foot towards weep holes in the subdrain of a smooth and
solidly formed subbase.
A) Engineer Who is responsible for final approval of plans on a public works project?
A) Engineer
B) Homeowner
C) City
D) Contractor
