FLORIDA UNDERGROUND UTILITY CONTRACTOR EXAM QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALES 2026 Q&A |LATEST EXAM UPDATE 2026/2027
Section One: Questions 1–100
A project engineer hands you a set of plans showing a proposed sanitary sewer main with a pipe
slope noted as 1.5%. Over a horizontal distance of 200 feet, how many feet will the pipe drop?
A. 1.5 feet
B. 2.0 feet
C. 3.0 feet
D. 4.5 feet
🟢 C. 3.0 feet
🔴 RATIONALE: A slope of 1.5% means a vertical drop of 1.5 feet for every 100 horizontal feet.
For 200 horizontal feet, the total drop is 1.5 multiplied by 2, which equals 3.0 feet.
According to Florida Statute Chapter 556, what is the minimum notification time required for an
excavator to provide to Sunshine 811 before beginning excavation?
A. 24 hours
B. 2 full business days
C. 5 business days
D. 7 calendar days
🟢 B. 2 full business days
🔴 RATIONALE: Florida law requires that the excavator notify the Sunshine 811 system at least 2
full business days, excluding weekends and legal holidays, prior to beginning any excavation work.
Under OSHA 1926 Subpart P, at what depth must a protective system (such as shoring, shielding,
or sloping) be implemented in a trench excavation unless the rock is entirely stable?
A. 3 feet
,B. 4 feet
C. 5 feet
D. 6 feet
🟢 C. 5 feet
🔴 RATIONALE: OSHA regulations require a protective system for excavations 5 feet or deeper,
unless the excavation is made entirely in stable rock.
Which color flag or spray paint is universally used under the APWA uniform color code to identify
potable water lines?
A. Red
B. Yellow
C. Blue
D. Green
🟢 C. Blue
🔴 RATIONALE: Under the American Public Works Association (APWA) uniform color code, blue
signifies potable (drinking) water lines.
When performing testing on a newly installed PVC water main, what is the typical recommended
testing method to confirm structural integrity and leak-free joints?
A. Low-pressure air testing
B. Hydrostatic pressure testing
C. Vacuum testing
D. Dye monitoring test
🟢 B. Hydrostatic pressure testing
🔴 RATIONALE: Hydrostatic pressure testing is the standard industry method used for water
mains to verify structural integrity and ensure there are no joint leaks under design pressures.
,What type of soil is characterized by an unconfined compressive strength of 1.5 tons per square
foot (tsf) or greater, according to OSHA soil classification?
A. Type A
B. Type B
C. Type C
D. Rock-soil matrix
🟢 A. Type A
🔴 RATIONALE: Type A soils are cohesive soils with an unconfined compressive strength of 1.5 tsf
or greater, representing the most stable cohesive soil class under OSHA standards.
What is the maximum distance a worker should have to travel to reach a safe means of egress
(such as a ladder or ramp) in an excavation trench that is 4 feet or deeper?
A. 15 feet
B. 25 feet
C. 50 feet
D. 100 feet
🟢 B. 25 feet
🔴 RATIONALE: OSHA standard 1926.651(c)(2) requires that a means of egress be located within
excavations that are 4 feet or deeper so as to require no more than 25 feet of lateral travel for
employees.
When installing concrete pipes using a trench shield (trench box), how should the pipe bedding be
compacted relative to the shield?
A. Compact the bedding inside the shield before it is pulled forward.
B. Compact the bedding only after pulling the shield forward to prevent disturbing the pipe zone.
C. Avoid compaction completely to allow natural settling.
D. Backfill with heavy clay without compaction.
, 🟢 B. Compact the bedding only after pulling the shield forward to prevent disturbing the pipe
zone.
🔴 RATIONALE: Pulling a trench shield can drag or loosen the pipe bedding and backfill material
directly adjacent to it. To ensure proper lateral support, final pipe zone compaction must occur after
the shield is moved.
In a standard project design, what type of line is represented by the color green in utility marking?
A. Natural Gas
B. Reclaimed Water
C. Sewers and Drain Lines
D. Electric Power Lines
🟢 C. Sewers and Drain Lines
🔴 RATIONALE: Green markings denote sanitary sewers, storm sewers, and drainage lines under
the APWA color code system.
Which Florida statute governs the licensing and regulation of construction contractors, including
underground utility and excavation contractors?
A. Chapter 455
B. Chapter 489
C. Chapter 556
D. Chapter 713
🟢 B. Chapter 489
🔴 RATIONALE: Chapter 489 of the Florida Statutes specifically governs construction contracting,
licensing requirements, and scope of work exemptions for all state-certified contractors.
What is the minimum horizontal clearance that an excavator must maintain when using
mechanized equipment within the "tolerance zone" of a marked underground utility line in Florida?
(VERIFIED ANSWERS) PLUS RATIONALES 2026 Q&A |LATEST EXAM UPDATE 2026/2027
Section One: Questions 1–100
A project engineer hands you a set of plans showing a proposed sanitary sewer main with a pipe
slope noted as 1.5%. Over a horizontal distance of 200 feet, how many feet will the pipe drop?
A. 1.5 feet
B. 2.0 feet
C. 3.0 feet
D. 4.5 feet
🟢 C. 3.0 feet
🔴 RATIONALE: A slope of 1.5% means a vertical drop of 1.5 feet for every 100 horizontal feet.
For 200 horizontal feet, the total drop is 1.5 multiplied by 2, which equals 3.0 feet.
According to Florida Statute Chapter 556, what is the minimum notification time required for an
excavator to provide to Sunshine 811 before beginning excavation?
A. 24 hours
B. 2 full business days
C. 5 business days
D. 7 calendar days
🟢 B. 2 full business days
🔴 RATIONALE: Florida law requires that the excavator notify the Sunshine 811 system at least 2
full business days, excluding weekends and legal holidays, prior to beginning any excavation work.
Under OSHA 1926 Subpart P, at what depth must a protective system (such as shoring, shielding,
or sloping) be implemented in a trench excavation unless the rock is entirely stable?
A. 3 feet
,B. 4 feet
C. 5 feet
D. 6 feet
🟢 C. 5 feet
🔴 RATIONALE: OSHA regulations require a protective system for excavations 5 feet or deeper,
unless the excavation is made entirely in stable rock.
Which color flag or spray paint is universally used under the APWA uniform color code to identify
potable water lines?
A. Red
B. Yellow
C. Blue
D. Green
🟢 C. Blue
🔴 RATIONALE: Under the American Public Works Association (APWA) uniform color code, blue
signifies potable (drinking) water lines.
When performing testing on a newly installed PVC water main, what is the typical recommended
testing method to confirm structural integrity and leak-free joints?
A. Low-pressure air testing
B. Hydrostatic pressure testing
C. Vacuum testing
D. Dye monitoring test
🟢 B. Hydrostatic pressure testing
🔴 RATIONALE: Hydrostatic pressure testing is the standard industry method used for water
mains to verify structural integrity and ensure there are no joint leaks under design pressures.
,What type of soil is characterized by an unconfined compressive strength of 1.5 tons per square
foot (tsf) or greater, according to OSHA soil classification?
A. Type A
B. Type B
C. Type C
D. Rock-soil matrix
🟢 A. Type A
🔴 RATIONALE: Type A soils are cohesive soils with an unconfined compressive strength of 1.5 tsf
or greater, representing the most stable cohesive soil class under OSHA standards.
What is the maximum distance a worker should have to travel to reach a safe means of egress
(such as a ladder or ramp) in an excavation trench that is 4 feet or deeper?
A. 15 feet
B. 25 feet
C. 50 feet
D. 100 feet
🟢 B. 25 feet
🔴 RATIONALE: OSHA standard 1926.651(c)(2) requires that a means of egress be located within
excavations that are 4 feet or deeper so as to require no more than 25 feet of lateral travel for
employees.
When installing concrete pipes using a trench shield (trench box), how should the pipe bedding be
compacted relative to the shield?
A. Compact the bedding inside the shield before it is pulled forward.
B. Compact the bedding only after pulling the shield forward to prevent disturbing the pipe zone.
C. Avoid compaction completely to allow natural settling.
D. Backfill with heavy clay without compaction.
, 🟢 B. Compact the bedding only after pulling the shield forward to prevent disturbing the pipe
zone.
🔴 RATIONALE: Pulling a trench shield can drag or loosen the pipe bedding and backfill material
directly adjacent to it. To ensure proper lateral support, final pipe zone compaction must occur after
the shield is moved.
In a standard project design, what type of line is represented by the color green in utility marking?
A. Natural Gas
B. Reclaimed Water
C. Sewers and Drain Lines
D. Electric Power Lines
🟢 C. Sewers and Drain Lines
🔴 RATIONALE: Green markings denote sanitary sewers, storm sewers, and drainage lines under
the APWA color code system.
Which Florida statute governs the licensing and regulation of construction contractors, including
underground utility and excavation contractors?
A. Chapter 455
B. Chapter 489
C. Chapter 556
D. Chapter 713
🟢 B. Chapter 489
🔴 RATIONALE: Chapter 489 of the Florida Statutes specifically governs construction contracting,
licensing requirements, and scope of work exemptions for all state-certified contractors.
What is the minimum horizontal clearance that an excavator must maintain when using
mechanized equipment within the "tolerance zone" of a marked underground utility line in Florida?
