AK Utility Contractor Exam Questions and
Correct Answers (Verified Answers) Plus
Rationale 2027 Q&A| Instant Download Pdf
1. What is the primary purpose of utility locating before excavation
begins?
a. To determine the soil color
b. To identify underground utility locations
c. To calculate equipment fuel consumption
d. To establish the project completion date
Answer: b. To identify underground utility locations
Rationale: Utility locating is performed before excavation to identify the
approximate location and alignment of buried utilities. Knowing where
utilities are located helps prevent damage, service interruptions,
injuries, and costly repairs.
2. Which document is most useful for identifying the planned
location and dimensions of a utility installation?
,a. Payroll register
b. Site plan
c. Employee handbook
d. Equipment warranty
Answer: b. Site plan
Rationale: A site plan provides information about the location,
dimensions, elevations, and relationships of proposed work to existing
features. Contractors use it to coordinate utility installation with the
overall project.
3. What is the main function of a trench box?
a. Increase excavation depth
b. Protect workers from cave-ins
c. Improve concrete curing
d. Store excavated material
Answer: b. Protect workers from cave-ins
Rationale: A trench box is a protective system designed to shield
workers inside a trench from cave-ins. It does not prevent a collapse but
provides a protected area for workers if the trench walls fail.
4. Which condition presents a significant hazard when working in a
utility trench?
,a. Properly compacted backfill
b. Stable access ladder
c. Accumulation of water
d. Clearly marked utilities
Answer: c. Accumulation of water
Rationale: Water can weaken trench walls, increase the likelihood of
collapse, and create additional hazards such as drowning, electrical
exposure, and unstable footing. Water must be controlled and the
excavation evaluated before workers enter.
5. What is the purpose of bedding material beneath a buried utility
pipe?
a. To increase pipe weight
b. To provide uniform support
c. To eliminate the need for backfill
d. To prevent surveying
Answer: b. To provide uniform support
Rationale: Proper bedding distributes loads beneath the pipe and helps
prevent point loading, settlement, and deformation. The bedding
material should meet project specifications for the particular utility.
, 6. When installing a gravity sewer, why is proper grade especially
important?
a. It determines pipe color
b. It controls gravity flow
c. It eliminates the need for manholes
d. It increases pipe wall thickness
Answer: b. It controls gravity flow
Rationale: Gravity sewer systems depend on elevation differences to
move wastewater. Incorrect grade can cause inadequate flow, excessive
velocity, sediment accumulation, or other operational problems.
7. What instrument is commonly used to establish precise elevations
during utility construction?
a. Level or laser level
b. Pipe wrench
c. Concrete vibrator
d. Pressure washer
Answer: a. Level or laser level
Rationale: Levels and construction lasers are commonly used to
establish and verify elevations and grades. Accurate elevation control is
Correct Answers (Verified Answers) Plus
Rationale 2027 Q&A| Instant Download Pdf
1. What is the primary purpose of utility locating before excavation
begins?
a. To determine the soil color
b. To identify underground utility locations
c. To calculate equipment fuel consumption
d. To establish the project completion date
Answer: b. To identify underground utility locations
Rationale: Utility locating is performed before excavation to identify the
approximate location and alignment of buried utilities. Knowing where
utilities are located helps prevent damage, service interruptions,
injuries, and costly repairs.
2. Which document is most useful for identifying the planned
location and dimensions of a utility installation?
,a. Payroll register
b. Site plan
c. Employee handbook
d. Equipment warranty
Answer: b. Site plan
Rationale: A site plan provides information about the location,
dimensions, elevations, and relationships of proposed work to existing
features. Contractors use it to coordinate utility installation with the
overall project.
3. What is the main function of a trench box?
a. Increase excavation depth
b. Protect workers from cave-ins
c. Improve concrete curing
d. Store excavated material
Answer: b. Protect workers from cave-ins
Rationale: A trench box is a protective system designed to shield
workers inside a trench from cave-ins. It does not prevent a collapse but
provides a protected area for workers if the trench walls fail.
4. Which condition presents a significant hazard when working in a
utility trench?
,a. Properly compacted backfill
b. Stable access ladder
c. Accumulation of water
d. Clearly marked utilities
Answer: c. Accumulation of water
Rationale: Water can weaken trench walls, increase the likelihood of
collapse, and create additional hazards such as drowning, electrical
exposure, and unstable footing. Water must be controlled and the
excavation evaluated before workers enter.
5. What is the purpose of bedding material beneath a buried utility
pipe?
a. To increase pipe weight
b. To provide uniform support
c. To eliminate the need for backfill
d. To prevent surveying
Answer: b. To provide uniform support
Rationale: Proper bedding distributes loads beneath the pipe and helps
prevent point loading, settlement, and deformation. The bedding
material should meet project specifications for the particular utility.
, 6. When installing a gravity sewer, why is proper grade especially
important?
a. It determines pipe color
b. It controls gravity flow
c. It eliminates the need for manholes
d. It increases pipe wall thickness
Answer: b. It controls gravity flow
Rationale: Gravity sewer systems depend on elevation differences to
move wastewater. Incorrect grade can cause inadequate flow, excessive
velocity, sediment accumulation, or other operational problems.
7. What instrument is commonly used to establish precise elevations
during utility construction?
a. Level or laser level
b. Pipe wrench
c. Concrete vibrator
d. Pressure washer
Answer: a. Level or laser level
Rationale: Levels and construction lasers are commonly used to
establish and verify elevations and grades. Accurate elevation control is
