Florida Underground Utility Contractor
Examination — DBPR Newest Evaluated
Exam Practice 120 Questions 20 26-
2027|Original Questions & An Swers
|Detailed Rationales |Hinted Complete
Exam Prep Grad Ed A+*Instant Download
Pdf*
1. A proposed gravity sewer line has an upstream invert elevation of 124.60 ft
and a downstream invert elevation of 120.20 ft over a horizontal run of 880
ft. What is the approximate pipe slope?
A. 0.25%
B. 0.40%
C. 0.50%
D. 0.80%
Answer: B. 0.50%
The elevation difference is 4.40 ft. Dividing 4.40 by 880 gives 0.005, or 0.50%
slope.
2. Before excavation begins, an existing underground utility is shown on
available records but its exact field location is uncertain. What is the most
appropriate action?
A. Proceed using the record drawing as the exact location
B. Increase excavation equipment size to expose it faster
C. Verify the utility location using appropriate locating and test-hole procedures
D. Relocate the utility without notifying the owner
,Answer: C. Verify the utility location using appropriate locating and test-hole
procedures
Records are not necessarily accurate enough for excavation. Field verification is
necessary where an existing facility could be affected.
3. A trench requires 1,260 cubic feet of compacted backfill. If the selected
material has a 20% volume increase when excavated, approximately how
much loose material should be anticipated before compaction?
A. 1,008 ft³
B. 1,260 ft³
C. 1,512 ft³
D. 1,575 ft³
Answer: C. 1,512 ft³
Applying the 20% increase: 1,260 × 1.20 = 1,512 ft³.
4. During excavation, groundwater begins entering the trench and the soil at
the trench bottom becomes unstable. What should be addressed first?
A. Increasing pipe bedding thickness without further evaluation
B. Controlling groundwater and maintaining a stable excavation
C. Increasing pipe joint lubricant
D. Increasing the trench width only at the surface
Answer: B. Controlling groundwater and maintaining a stable excavation
Groundwater can destabilize trench walls and the trench bottom. Dewatering and
excavation stability must be addressed before continuing installation.
5. A trench is 8 ft deep and 4 ft wide. Which condition presents the greatest
immediate concern when workers must enter the excavation?
A. The trench contains newly placed bedding
B. The trench has vertical sides in potentially unstable soil without adequate
protective measures
,C. The pipe diameter is 12 inches
D. The trench is located beside an empty lot
Answer: B. The trench has vertical sides in potentially unstable soil without
adequate protective measures
Worker protection against cave-ins is a primary excavation safety requirement.
6. A pipe installation requires the trench bottom to remain at a specified
elevation. Which instrument is most appropriate for repeatedly checking
grade during installation?
A. Pipe wrench
B. Laser level or equivalent grade-control instrument
C. Soil density gauge only
D. Measuring wheel alone
Answer: B. Laser level or equivalent grade-control instrument
Grade-control equipment allows the installer to establish and verify the required
line and elevation.
7. A roadway excavation requires temporary traffic control. Which factor is
most important when determining the appropriate control arrangement?
A. Contractor's preferred equipment color
B. Work-zone location, traffic conditions, roadway characteristics, and applicable
traffic-control requirements
C. Pipe manufacturer's shipping method
D. Backfill material density only
Answer: B. Work-zone location, traffic conditions, roadway characteristics, and
applicable traffic-control requirements
Traffic control must account for actual roadway and work-zone conditions and
applicable requirements.
, 8. A pipe trench is specified to have a compacted backfill density of 95% of the
applicable maximum dry density. A field test indicates 91%. What is the
appropriate conclusion?
A. The material automatically passes because it exceeds 90%
B. The material meets the requirement if the pipe is pressure tested
C. The compaction does not meet the specified requirement
D. The result applies only to the pipe manufacturer
Answer: C. The compaction does not meet the specified requirement
If the specified minimum is 95%, a measured 91% does not satisfy that
requirement.
9. A trench bottom contains soft, unsuitable material that cannot adequately
support the proposed pipe. What is the most appropriate approach?
A. Install the pipe directly over the unsuitable material
B. Remove or otherwise treat the unsuitable material as specified and establish
proper support
C. Increase pipe pressure only
D. Reduce the pipe diameter
Answer: B. Remove or otherwise treat the unsuitable material as specified and
establish proper support
Pipe performance depends on adequate foundation and bedding conditions.
10.Why is proper bedding particularly important beneath a rigid pipe?
A. It eliminates the need for joint inspection
B. It helps provide uniform support and reduces concentrated loading
C. It prevents all groundwater from entering the trench
D. It replaces the need for backfill compaction
Answer: B. It helps provide uniform support and reduces concentrated loading
Proper bedding distributes support and helps prevent damaging point loads.
Examination — DBPR Newest Evaluated
Exam Practice 120 Questions 20 26-
2027|Original Questions & An Swers
|Detailed Rationales |Hinted Complete
Exam Prep Grad Ed A+*Instant Download
Pdf*
1. A proposed gravity sewer line has an upstream invert elevation of 124.60 ft
and a downstream invert elevation of 120.20 ft over a horizontal run of 880
ft. What is the approximate pipe slope?
A. 0.25%
B. 0.40%
C. 0.50%
D. 0.80%
Answer: B. 0.50%
The elevation difference is 4.40 ft. Dividing 4.40 by 880 gives 0.005, or 0.50%
slope.
2. Before excavation begins, an existing underground utility is shown on
available records but its exact field location is uncertain. What is the most
appropriate action?
A. Proceed using the record drawing as the exact location
B. Increase excavation equipment size to expose it faster
C. Verify the utility location using appropriate locating and test-hole procedures
D. Relocate the utility without notifying the owner
,Answer: C. Verify the utility location using appropriate locating and test-hole
procedures
Records are not necessarily accurate enough for excavation. Field verification is
necessary where an existing facility could be affected.
3. A trench requires 1,260 cubic feet of compacted backfill. If the selected
material has a 20% volume increase when excavated, approximately how
much loose material should be anticipated before compaction?
A. 1,008 ft³
B. 1,260 ft³
C. 1,512 ft³
D. 1,575 ft³
Answer: C. 1,512 ft³
Applying the 20% increase: 1,260 × 1.20 = 1,512 ft³.
4. During excavation, groundwater begins entering the trench and the soil at
the trench bottom becomes unstable. What should be addressed first?
A. Increasing pipe bedding thickness without further evaluation
B. Controlling groundwater and maintaining a stable excavation
C. Increasing pipe joint lubricant
D. Increasing the trench width only at the surface
Answer: B. Controlling groundwater and maintaining a stable excavation
Groundwater can destabilize trench walls and the trench bottom. Dewatering and
excavation stability must be addressed before continuing installation.
5. A trench is 8 ft deep and 4 ft wide. Which condition presents the greatest
immediate concern when workers must enter the excavation?
A. The trench contains newly placed bedding
B. The trench has vertical sides in potentially unstable soil without adequate
protective measures
,C. The pipe diameter is 12 inches
D. The trench is located beside an empty lot
Answer: B. The trench has vertical sides in potentially unstable soil without
adequate protective measures
Worker protection against cave-ins is a primary excavation safety requirement.
6. A pipe installation requires the trench bottom to remain at a specified
elevation. Which instrument is most appropriate for repeatedly checking
grade during installation?
A. Pipe wrench
B. Laser level or equivalent grade-control instrument
C. Soil density gauge only
D. Measuring wheel alone
Answer: B. Laser level or equivalent grade-control instrument
Grade-control equipment allows the installer to establish and verify the required
line and elevation.
7. A roadway excavation requires temporary traffic control. Which factor is
most important when determining the appropriate control arrangement?
A. Contractor's preferred equipment color
B. Work-zone location, traffic conditions, roadway characteristics, and applicable
traffic-control requirements
C. Pipe manufacturer's shipping method
D. Backfill material density only
Answer: B. Work-zone location, traffic conditions, roadway characteristics, and
applicable traffic-control requirements
Traffic control must account for actual roadway and work-zone conditions and
applicable requirements.
, 8. A pipe trench is specified to have a compacted backfill density of 95% of the
applicable maximum dry density. A field test indicates 91%. What is the
appropriate conclusion?
A. The material automatically passes because it exceeds 90%
B. The material meets the requirement if the pipe is pressure tested
C. The compaction does not meet the specified requirement
D. The result applies only to the pipe manufacturer
Answer: C. The compaction does not meet the specified requirement
If the specified minimum is 95%, a measured 91% does not satisfy that
requirement.
9. A trench bottom contains soft, unsuitable material that cannot adequately
support the proposed pipe. What is the most appropriate approach?
A. Install the pipe directly over the unsuitable material
B. Remove or otherwise treat the unsuitable material as specified and establish
proper support
C. Increase pipe pressure only
D. Reduce the pipe diameter
Answer: B. Remove or otherwise treat the unsuitable material as specified and
establish proper support
Pipe performance depends on adequate foundation and bedding conditions.
10.Why is proper bedding particularly important beneath a rigid pipe?
A. It eliminates the need for joint inspection
B. It helps provide uniform support and reduces concentrated loading
C. It prevents all groundwater from entering the trench
D. It replaces the need for backfill compaction
Answer: B. It helps provide uniform support and reduces concentrated loading
Proper bedding distributes support and helps prevent damaging point loads.
