6-FL-UC FL CONSTRUCTION UNDERGROUND UTILITY TRADE KNOWLEDGE PRACTICE
EXAM LATEST QUESTIONS AND CORRECT ANSWERS
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QUESTION 1
What is the primary purpose of "One-Call" (811) system?
A) To schedule equipment deliveries
B) To request locates of underground utilities before excavation
C) To call for emergency repairs
D) To notify residents of water shutdowns
ANSWER: B) To request locates of underground utilities before excavation
EXPLANATION: The 811 "Call Before You Dig" system is a nationwide program that
coordinates with utility companies to mark the approximate location of underground lines
to prevent damage during excavation.
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QUESTION 2
Which color paint or flag typically marks telecommunications lines?
A) Orange
B) Blue
C) Green
D) Yellow
ANSWER: A) Orange
EXPLANATION: Orange indicates telecommunications, alarm, signal lines, cables, or
conduit. This is part of the American Public Works Association (APWA) uniform color code.
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QUESTION 3
What does "POTW" stand for in wastewater context?
A) Primary Organic Treatment Works
B) Publicly Owned Treatment Works
C) Potable Water Treatment
D) Pressure Oxidation Tank Works
ANSWER: B) Publicly Owned Treatment Works
EXPLANATION: POTW refers to any treatment plant owned by a state or municipality used
to treat domestic and industrial wastewater.
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QUESTION 4
The minimum required separation between a water main and a sewer line (parallel
installation) is typically:
A) 3 feet horizontal
B) 6 feet horizontal
C) 10 feet horizontal
D) 18 inches horizontal
ANSWER: C) 10 feet horizontal
EXPLANATION: Most codes require a minimum 10-foot horizontal separation between
water and sewer lines to prevent contamination if a leak occurs. This distance may vary by
jurisdiction.
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QUESTION 5
What is the primary purpose of a "tracer wire" installed with non-metallic piping?
A) To carry electrical current for cathodic protection
B) To provide a metallic line for future locating
C) To support the pipe during installation
D) To measure pipe deflection
ANSWER: B) To provide a metallic line for future locating
EXPLANATION: Tracer wires (locating wires) are installed with non-conductive pipes (like
PVC) so the line can be easily located later with electronic locating equipment.
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QUESTION 6
Which type of pipe joint allows for expansion and contraction?
A) Bell and spigot
B) Flanged
C) Mechanical
D) Expansion
ANSWER: D) Expansion
EXPLANATION: Expansion joints are specifically designed to accommodate thermal
expansion, contraction, or settlement in piping systems without causing stress or damage.
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QUESTION 7
The "bell" end of a pipe refers to:
, A) The smaller, tapered end
B) The flared or enlarged end that receives the spigot
C) The end with threading
D) The end that connects to a valve
ANSWER: B) The flared or enlarged end that receives the spigot
EXPLANATION: In bell and spigot joints, the "bell" is the enlarged, flared end, and the
"spigot" is the plain end that fits into it.
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QUESTION 8
What is the minimum cover requirement for a water main under a roadway in most
jurisdictions?
A) 18 inches
B) 30 inches
C) 42 inches
D) 60 inches
ANSWER: B) 30 inches
EXPLANATION: Standard minimum cover for water mains under roadways is typically 30
inches (2.5 feet) to protect from freezing and surface loads, though local codes may vary.
---
QUESTION 9
Which type of valve is designed to prevent backflow in a water system?
A) Gate valve
B) Check valve
EXAM LATEST QUESTIONS AND CORRECT ANSWERS
---
QUESTION 1
What is the primary purpose of "One-Call" (811) system?
A) To schedule equipment deliveries
B) To request locates of underground utilities before excavation
C) To call for emergency repairs
D) To notify residents of water shutdowns
ANSWER: B) To request locates of underground utilities before excavation
EXPLANATION: The 811 "Call Before You Dig" system is a nationwide program that
coordinates with utility companies to mark the approximate location of underground lines
to prevent damage during excavation.
---
QUESTION 2
Which color paint or flag typically marks telecommunications lines?
A) Orange
B) Blue
C) Green
D) Yellow
ANSWER: A) Orange
EXPLANATION: Orange indicates telecommunications, alarm, signal lines, cables, or
conduit. This is part of the American Public Works Association (APWA) uniform color code.
,---
QUESTION 3
What does "POTW" stand for in wastewater context?
A) Primary Organic Treatment Works
B) Publicly Owned Treatment Works
C) Potable Water Treatment
D) Pressure Oxidation Tank Works
ANSWER: B) Publicly Owned Treatment Works
EXPLANATION: POTW refers to any treatment plant owned by a state or municipality used
to treat domestic and industrial wastewater.
---
QUESTION 4
The minimum required separation between a water main and a sewer line (parallel
installation) is typically:
A) 3 feet horizontal
B) 6 feet horizontal
C) 10 feet horizontal
D) 18 inches horizontal
ANSWER: C) 10 feet horizontal
EXPLANATION: Most codes require a minimum 10-foot horizontal separation between
water and sewer lines to prevent contamination if a leak occurs. This distance may vary by
jurisdiction.
,---
QUESTION 5
What is the primary purpose of a "tracer wire" installed with non-metallic piping?
A) To carry electrical current for cathodic protection
B) To provide a metallic line for future locating
C) To support the pipe during installation
D) To measure pipe deflection
ANSWER: B) To provide a metallic line for future locating
EXPLANATION: Tracer wires (locating wires) are installed with non-conductive pipes (like
PVC) so the line can be easily located later with electronic locating equipment.
---
QUESTION 6
Which type of pipe joint allows for expansion and contraction?
A) Bell and spigot
B) Flanged
C) Mechanical
D) Expansion
ANSWER: D) Expansion
EXPLANATION: Expansion joints are specifically designed to accommodate thermal
expansion, contraction, or settlement in piping systems without causing stress or damage.
---
QUESTION 7
The "bell" end of a pipe refers to:
, A) The smaller, tapered end
B) The flared or enlarged end that receives the spigot
C) The end with threading
D) The end that connects to a valve
ANSWER: B) The flared or enlarged end that receives the spigot
EXPLANATION: In bell and spigot joints, the "bell" is the enlarged, flared end, and the
"spigot" is the plain end that fits into it.
---
QUESTION 8
What is the minimum cover requirement for a water main under a roadway in most
jurisdictions?
A) 18 inches
B) 30 inches
C) 42 inches
D) 60 inches
ANSWER: B) 30 inches
EXPLANATION: Standard minimum cover for water mains under roadways is typically 30
inches (2.5 feet) to protect from freezing and surface loads, though local codes may vary.
---
QUESTION 9
Which type of valve is designed to prevent backflow in a water system?
A) Gate valve
B) Check valve
