Louisiana Plumbing Contractor Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2027
Q&A| Instant Download Pdf.
1. A contractor is applying for the Louisiana State Licensing Board for
Contractors (LSLBC) Plumbing classification for commercial work.
Which description most accurately defines the Plumbing classification?
A. Installation and repair of municipal water-distribution mains and pumping
stations
B. Construction, installation, maintenance, or repair of potable and non-
potable tap-water and sewer-water systems within a building structure or
house
C. Installation and repair of industrial process piping and refinery piping
systems
D. Installation of private water wells and groundwater-extraction systems
B. Construction, installation, maintenance, or repair of potable and non-
potable tap-water and sewer-water systems within a building structure or
house
The Louisiana Plumbing classification covers potable and non-potable tap-
water and sewer-water systems within buildings or houses. Municipal
distribution systems and water-well drilling fall under different
classifications or regulatory requirements.
, 2. Under the current LSLBC classification requirements, when is a
Louisiana Plumbing contractor license generally required for plumbing
work?
A. When the project exceeds $1,000
B. When the project exceeds $5,000
C. When the project exceeds $10,000
D. For every plumbing repair regardless of value
C. When the project exceeds $10,000
The LSLBC identifies Plumbing as a classification requiring a license when
the value of the plumbing work exceeds $10,000.
3. Which organization issues the Master Plumber credential that is
relevant to the Louisiana LSLBC Plumbing classification?
A. Louisiana Department of Environmental Quality
B. State Plumbing Board of Louisiana
C. Louisiana State Fire Marshal
D. Louisiana Secretary of State
B. State Plumbing Board of Louisiana
The LSLBC candidate information bulletin states that applicants for the
Plumbing classification must submit a copy of their Master Plumber’s
License from the State Plumbing Board of Louisiana.
4. A company wishes to obtain the LSLBC commercial Plumbing
classification. What credential is specifically identified in the LSLBC
candidate information bulletin as being required with the commercial
license application?
A. Journeyman Electrician License
B. Master Plumber’s License
C. Mechanical Engineer License
D. General Contractor Certificate
,B. Master Plumber’s License
The LSLBC Plumbing candidate information bulletin specifically directs
applicants to submit a copy of their Master Plumber’s License from the
State Plumbing Board of Louisiana with the commercial contractor license
application.
5. Which statement best distinguishes the Louisiana Plumbing
classification from Municipal and Public Works Construction?
A. Plumbing covers only gas piping, whereas Municipal and Public Works
covers potable water
B. Plumbing primarily concerns water and sewer systems within buildings,
whereas Municipal and Public Works includes infrastructure such as
municipal water and sewer distribution systems
C. Plumbing is limited to residential buildings, whereas Municipal and Public
Works is limited to commercial buildings
D. There is no distinction between the two classifications
B. Plumbing primarily concerns water and sewer systems within buildings,
whereas Municipal and Public Works includes infrastructure such as
municipal water and sewer distribution systems
The LSLBC defines Plumbing in terms of systems within a building or house,
while Municipal and Public Works includes infrastructure serving
municipalities, including water and sewer distribution systems.
6. A Louisiana contractor holds a Mechanical classification and intends to
perform plumbing work valued at more than $10,000. What additional
credential is required according to the LSLBC classification
information?
A. A Master Plumber license
B. A water-well drilling license
C. An electrical contractor license
D. No additional credential is ever required
, A. A Master Plumber license
The LSLBC states that a mechanical contractor performing plumbing work
valued over $10,000 must possess a Master Plumber license from the State
Plumbing Board of Louisiana.
7. Which of the following is most clearly within the scope of the
Louisiana Plumbing classification?
A. Installation of a municipal water transmission main several miles from a
building
B. Installation of a building's domestic cold-water and sanitary drainage
systems
C. Drilling a new groundwater well
D. Construction of a chemical refinery process-piping network
B. Installation of a building's domestic cold-water and sanitary drainage
systems
Domestic water and sewer systems located within a building or house are
expressly within the Plumbing classification. Municipal mains, water wells,
and industrial process piping are governed by other classifications or
credentials.
8. Which LSLBC classification number corresponds to Plumbing?
A. 4
B. 5
C. 6
D. 7
D. 7
The LSLBC identifies Plumbing as major classification 7, while Municipal
and Public Works is classification 4, Electrical is 5, and Mechanical is 6.
Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2027
Q&A| Instant Download Pdf.
1. A contractor is applying for the Louisiana State Licensing Board for
Contractors (LSLBC) Plumbing classification for commercial work.
Which description most accurately defines the Plumbing classification?
A. Installation and repair of municipal water-distribution mains and pumping
stations
B. Construction, installation, maintenance, or repair of potable and non-
potable tap-water and sewer-water systems within a building structure or
house
C. Installation and repair of industrial process piping and refinery piping
systems
D. Installation of private water wells and groundwater-extraction systems
B. Construction, installation, maintenance, or repair of potable and non-
potable tap-water and sewer-water systems within a building structure or
house
The Louisiana Plumbing classification covers potable and non-potable tap-
water and sewer-water systems within buildings or houses. Municipal
distribution systems and water-well drilling fall under different
classifications or regulatory requirements.
, 2. Under the current LSLBC classification requirements, when is a
Louisiana Plumbing contractor license generally required for plumbing
work?
A. When the project exceeds $1,000
B. When the project exceeds $5,000
C. When the project exceeds $10,000
D. For every plumbing repair regardless of value
C. When the project exceeds $10,000
The LSLBC identifies Plumbing as a classification requiring a license when
the value of the plumbing work exceeds $10,000.
3. Which organization issues the Master Plumber credential that is
relevant to the Louisiana LSLBC Plumbing classification?
A. Louisiana Department of Environmental Quality
B. State Plumbing Board of Louisiana
C. Louisiana State Fire Marshal
D. Louisiana Secretary of State
B. State Plumbing Board of Louisiana
The LSLBC candidate information bulletin states that applicants for the
Plumbing classification must submit a copy of their Master Plumber’s
License from the State Plumbing Board of Louisiana.
4. A company wishes to obtain the LSLBC commercial Plumbing
classification. What credential is specifically identified in the LSLBC
candidate information bulletin as being required with the commercial
license application?
A. Journeyman Electrician License
B. Master Plumber’s License
C. Mechanical Engineer License
D. General Contractor Certificate
,B. Master Plumber’s License
The LSLBC Plumbing candidate information bulletin specifically directs
applicants to submit a copy of their Master Plumber’s License from the
State Plumbing Board of Louisiana with the commercial contractor license
application.
5. Which statement best distinguishes the Louisiana Plumbing
classification from Municipal and Public Works Construction?
A. Plumbing covers only gas piping, whereas Municipal and Public Works
covers potable water
B. Plumbing primarily concerns water and sewer systems within buildings,
whereas Municipal and Public Works includes infrastructure such as
municipal water and sewer distribution systems
C. Plumbing is limited to residential buildings, whereas Municipal and Public
Works is limited to commercial buildings
D. There is no distinction between the two classifications
B. Plumbing primarily concerns water and sewer systems within buildings,
whereas Municipal and Public Works includes infrastructure such as
municipal water and sewer distribution systems
The LSLBC defines Plumbing in terms of systems within a building or house,
while Municipal and Public Works includes infrastructure serving
municipalities, including water and sewer distribution systems.
6. A Louisiana contractor holds a Mechanical classification and intends to
perform plumbing work valued at more than $10,000. What additional
credential is required according to the LSLBC classification
information?
A. A Master Plumber license
B. A water-well drilling license
C. An electrical contractor license
D. No additional credential is ever required
, A. A Master Plumber license
The LSLBC states that a mechanical contractor performing plumbing work
valued over $10,000 must possess a Master Plumber license from the State
Plumbing Board of Louisiana.
7. Which of the following is most clearly within the scope of the
Louisiana Plumbing classification?
A. Installation of a municipal water transmission main several miles from a
building
B. Installation of a building's domestic cold-water and sanitary drainage
systems
C. Drilling a new groundwater well
D. Construction of a chemical refinery process-piping network
B. Installation of a building's domestic cold-water and sanitary drainage
systems
Domestic water and sewer systems located within a building or house are
expressly within the Plumbing classification. Municipal mains, water wells,
and industrial process piping are governed by other classifications or
credentials.
8. Which LSLBC classification number corresponds to Plumbing?
A. 4
B. 5
C. 6
D. 7
D. 7
The LSLBC identifies Plumbing as major classification 7, while Municipal
and Public Works is classification 4, Electrical is 5, and Mechanical is 6.
