Page 1 of 140
Rhode Island Underground Utility Contractor Exam
QUESTIONS AND CORRECT ANSWERS WITH
RATIONALES
Rhode Island Underground Utility Contractor Exam —Practice Questions
10 MOST-TESTED EXAM COVERAGE AREAS
1. Rhode Island Contractor Licensing & Responsibilities — contractor requirements, license
responsibilities, permits, supervision, compliance, business practices, and duties on
underground utility projects.
2. Underground Utility Safety — excavation hazards, trench safety, protective systems,
competent-person responsibilities, access and egress, spoil placement, and worksite
inspections.
3. Utility Location & Damage Prevention — utility marking, Dig Safe requirements, locating
existing utilities, tolerance zones, excavation near marked facilities, and preventing utility
strikes.
4. Excavation & Trenching — soil conditions, trench dimensions, sloping, benching, shoring, trench
boxes, cave-in prevention, and safe excavation procedures.
5. Underground Water Systems — water-main installation, bedding, pipe joining, valves, hydrants,
pressure testing, disinfection, flushing, and backflow considerations.
6. Sanitary Sewer Systems — gravity sewers, manholes, sewer laterals, slopes, bedding,
infiltration, testing, cleaning, and inspection.
7. Storm Drainage Systems — catch basins, drainage structures, culverts, storm pipe, grading,
outlets, erosion control, and installation practices.
8. Utility Pipe Installation & Materials — PVC, HDPE, ductile iron, concrete and other underground
utility materials, fittings, joints, handling, storage, and installation.
9. Backfilling, Compaction & Restoration — approved fill, lift thickness, moisture control,
compaction testing, pavement restoration, settlement prevention, and site cleanup.
10. Plans, Measurements, Equipment & Project Control — construction drawings, elevations,
grades, utility profiles, trench measurements, equipment operation, estimating, documentation,
and quality control.
1.
Before excavation begins on a utility project, what is the most important first step for identifying existing
underground utility lines?
, Page 2 of 140
A. Begin excavation with a small bucket
B. Request utility locating information
C. Remove the pavement first
D. Place the excavator beside the trench
Answer: B
Rationale: Existing utilities should be identified and properly marked before excavation begins to reduce
the risk of utility strikes.
2.
Why should excavated soil and other materials be kept away from the edge of an open trench?
A. To make the soil wetter
B. To increase trench depth
C. To reduce the chance of material falling into the trench
D. To make the excavator move faster
Answer: C
Rationale: Spoil placed too close to a trench edge can fall into the excavation and increase the danger of
a cave-in.
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3.
What is the main purpose of a trench protective system when workers must enter an excavation?
A. Increase pipe pressure
B. Prevent workers from being buried by a cave-in
C. Reduce equipment fuel use
D. Improve pavement color
Answer: B
Rationale: Shoring, sloping, benching, and trench boxes help protect workers from dangerous trench-
wall collapse.
4.
When installing a gravity sewer, why is maintaining the designed pipe grade especially important?
A. It controls the color of the pipe
B. It allows wastewater to flow properly
C. It increases pipe weight
D. It prevents all pipe damage
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Answer: B
Rationale: Gravity sewer systems depend on proper slope and elevation to provide reliable wastewater
flow.
5.
What should a contractor do when an excavation exposes an unknown utility that was not shown on the
available plans?
A. Continue digging quickly
B. Cut the utility immediately
C. Stop and identify the utility before continuing
D. Cover it with soil
Answer: C
Rationale: An unknown utility may be active and dangerous, so work should stop until the utility is
properly identified.
6.
What is the primary purpose of bedding placed beneath underground utility pipe?
Rhode Island Underground Utility Contractor Exam
QUESTIONS AND CORRECT ANSWERS WITH
RATIONALES
Rhode Island Underground Utility Contractor Exam —Practice Questions
10 MOST-TESTED EXAM COVERAGE AREAS
1. Rhode Island Contractor Licensing & Responsibilities — contractor requirements, license
responsibilities, permits, supervision, compliance, business practices, and duties on
underground utility projects.
2. Underground Utility Safety — excavation hazards, trench safety, protective systems,
competent-person responsibilities, access and egress, spoil placement, and worksite
inspections.
3. Utility Location & Damage Prevention — utility marking, Dig Safe requirements, locating
existing utilities, tolerance zones, excavation near marked facilities, and preventing utility
strikes.
4. Excavation & Trenching — soil conditions, trench dimensions, sloping, benching, shoring, trench
boxes, cave-in prevention, and safe excavation procedures.
5. Underground Water Systems — water-main installation, bedding, pipe joining, valves, hydrants,
pressure testing, disinfection, flushing, and backflow considerations.
6. Sanitary Sewer Systems — gravity sewers, manholes, sewer laterals, slopes, bedding,
infiltration, testing, cleaning, and inspection.
7. Storm Drainage Systems — catch basins, drainage structures, culverts, storm pipe, grading,
outlets, erosion control, and installation practices.
8. Utility Pipe Installation & Materials — PVC, HDPE, ductile iron, concrete and other underground
utility materials, fittings, joints, handling, storage, and installation.
9. Backfilling, Compaction & Restoration — approved fill, lift thickness, moisture control,
compaction testing, pavement restoration, settlement prevention, and site cleanup.
10. Plans, Measurements, Equipment & Project Control — construction drawings, elevations,
grades, utility profiles, trench measurements, equipment operation, estimating, documentation,
and quality control.
1.
Before excavation begins on a utility project, what is the most important first step for identifying existing
underground utility lines?
, Page 2 of 140
A. Begin excavation with a small bucket
B. Request utility locating information
C. Remove the pavement first
D. Place the excavator beside the trench
Answer: B
Rationale: Existing utilities should be identified and properly marked before excavation begins to reduce
the risk of utility strikes.
2.
Why should excavated soil and other materials be kept away from the edge of an open trench?
A. To make the soil wetter
B. To increase trench depth
C. To reduce the chance of material falling into the trench
D. To make the excavator move faster
Answer: C
Rationale: Spoil placed too close to a trench edge can fall into the excavation and increase the danger of
a cave-in.
, Page 3 of 140
3.
What is the main purpose of a trench protective system when workers must enter an excavation?
A. Increase pipe pressure
B. Prevent workers from being buried by a cave-in
C. Reduce equipment fuel use
D. Improve pavement color
Answer: B
Rationale: Shoring, sloping, benching, and trench boxes help protect workers from dangerous trench-
wall collapse.
4.
When installing a gravity sewer, why is maintaining the designed pipe grade especially important?
A. It controls the color of the pipe
B. It allows wastewater to flow properly
C. It increases pipe weight
D. It prevents all pipe damage
, Page 4 of 140
Answer: B
Rationale: Gravity sewer systems depend on proper slope and elevation to provide reliable wastewater
flow.
5.
What should a contractor do when an excavation exposes an unknown utility that was not shown on the
available plans?
A. Continue digging quickly
B. Cut the utility immediately
C. Stop and identify the utility before continuing
D. Cover it with soil
Answer: C
Rationale: An unknown utility may be active and dangerous, so work should stop until the utility is
properly identified.
6.
What is the primary purpose of bedding placed beneath underground utility pipe?
