CO Utility Contractor Exam Practice
Questions And Correct Answers
(Verified Answers) Plus Rationale 2027
Q&A| Instant Download Pdf.
1. Which practice is most appropriate when excavating for a utility
trench in Colorado where the planned excavation will be deeper
than 5 feet and employees will enter the excavation?
A. Allow workers to enter without protective systems if the soil appears
stable
B. Use a protective system such as sloping, benching, or an appropriately
designed protective structure unless an applicable exception applies
C. Place excavated material directly against the trench wall to support it
D. Require workers to remain in the trench only during dry weather
B. Use a protective system such as sloping, benching, or an
appropriately designed protective structure unless an applicable
exception applies
Trenches that expose workers to cave-in hazards generally require an
appropriate protective system. The system must be selected based on
soil conditions, excavation geometry, depth, and applicable safety
requirements.
, 2. Before beginning excavation for a new underground utility
installation, what is the primary purpose of contacting the
applicable utility-locate service?
A. To obtain the contractor's building permit
B. To determine the final depth of the proposed utility
C. To identify existing underground facilities so they can be located and
protected
D. To establish the contractor's material markup
C. To identify existing underground facilities so they can be located and
protected
Utility locating helps prevent damage to existing electric, gas, water,
sewer, communications, and other underground facilities. Proper
locating and safe excavation procedures are essential before digging.
3. A utility contractor discovers an existing gas line that conflicts with
the proposed alignment. What should the contractor do first?
A. Remove the gas line immediately
B. Continue excavation and work around it without notifying anyone
C. Stop work in the affected area and coordinate with the appropriate
utility owner or authority
D. Cover the gas line with concrete
C. Stop work in the affected area and coordinate with the appropriate
utility owner or authority
,An unexpected utility conflict can create serious safety and service
hazards. The existing facility should be protected and the conflict
resolved through proper coordination before work proceeds.
4. Which soil characteristic is particularly important when determining
the stability and protective requirements of a utility trench?
A. Soil color alone
B. Soil classification and stability
C. Brand of excavation equipment
D. Pipe manufacturer
B. Soil classification and stability
Soil type, moisture, layering, surcharge loads, and other site conditions
affect the likelihood of trench-wall failure. Protective measures must
account for actual field conditions.
5. What is the principal purpose of trench shoring?
A. To increase excavation production
B. To prevent trench-wall movement and protect workers from cave-ins
C. To reduce pipe diameter
D. To replace utility locating
B. To prevent trench-wall movement and protect workers from cave-ins
Shoring is a protective system designed to support trench walls and
reduce the risk of collapse. It is a worker-protection measure rather than
simply a construction convenience.
, 6. When installing a gravity sewer, why is maintaining the specified
grade particularly important?
A. It determines the color of the pipe
B. It allows sewage to flow by gravity at the designed hydraulic conditions
C. It eliminates the need for manholes
D. It prevents all pipe expansion
B. It allows sewage to flow by gravity at the designed hydraulic
conditions
Gravity sewer systems depend on appropriate slope and alignment to
provide reliable flow. Incorrect grade can contribute to inadequate
velocity, sediment accumulation, surcharging, or other operational
problems.
7. What instrument is commonly used to establish and verify the
elevation and grade of utility installations?
A. Pipe wrench
B. Laser level or construction level
C. Torque wrench
D. Pressure gauge
B. Laser level or construction level
A laser level or suitable surveying instrument can establish elevations
and verify line and grade. Accurate elevation control is especially
important for gravity pipelines.
Questions And Correct Answers
(Verified Answers) Plus Rationale 2027
Q&A| Instant Download Pdf.
1. Which practice is most appropriate when excavating for a utility
trench in Colorado where the planned excavation will be deeper
than 5 feet and employees will enter the excavation?
A. Allow workers to enter without protective systems if the soil appears
stable
B. Use a protective system such as sloping, benching, or an appropriately
designed protective structure unless an applicable exception applies
C. Place excavated material directly against the trench wall to support it
D. Require workers to remain in the trench only during dry weather
B. Use a protective system such as sloping, benching, or an
appropriately designed protective structure unless an applicable
exception applies
Trenches that expose workers to cave-in hazards generally require an
appropriate protective system. The system must be selected based on
soil conditions, excavation geometry, depth, and applicable safety
requirements.
, 2. Before beginning excavation for a new underground utility
installation, what is the primary purpose of contacting the
applicable utility-locate service?
A. To obtain the contractor's building permit
B. To determine the final depth of the proposed utility
C. To identify existing underground facilities so they can be located and
protected
D. To establish the contractor's material markup
C. To identify existing underground facilities so they can be located and
protected
Utility locating helps prevent damage to existing electric, gas, water,
sewer, communications, and other underground facilities. Proper
locating and safe excavation procedures are essential before digging.
3. A utility contractor discovers an existing gas line that conflicts with
the proposed alignment. What should the contractor do first?
A. Remove the gas line immediately
B. Continue excavation and work around it without notifying anyone
C. Stop work in the affected area and coordinate with the appropriate
utility owner or authority
D. Cover the gas line with concrete
C. Stop work in the affected area and coordinate with the appropriate
utility owner or authority
,An unexpected utility conflict can create serious safety and service
hazards. The existing facility should be protected and the conflict
resolved through proper coordination before work proceeds.
4. Which soil characteristic is particularly important when determining
the stability and protective requirements of a utility trench?
A. Soil color alone
B. Soil classification and stability
C. Brand of excavation equipment
D. Pipe manufacturer
B. Soil classification and stability
Soil type, moisture, layering, surcharge loads, and other site conditions
affect the likelihood of trench-wall failure. Protective measures must
account for actual field conditions.
5. What is the principal purpose of trench shoring?
A. To increase excavation production
B. To prevent trench-wall movement and protect workers from cave-ins
C. To reduce pipe diameter
D. To replace utility locating
B. To prevent trench-wall movement and protect workers from cave-ins
Shoring is a protective system designed to support trench walls and
reduce the risk of collapse. It is a worker-protection measure rather than
simply a construction convenience.
, 6. When installing a gravity sewer, why is maintaining the specified
grade particularly important?
A. It determines the color of the pipe
B. It allows sewage to flow by gravity at the designed hydraulic conditions
C. It eliminates the need for manholes
D. It prevents all pipe expansion
B. It allows sewage to flow by gravity at the designed hydraulic
conditions
Gravity sewer systems depend on appropriate slope and alignment to
provide reliable flow. Incorrect grade can contribute to inadequate
velocity, sediment accumulation, surcharging, or other operational
problems.
7. What instrument is commonly used to establish and verify the
elevation and grade of utility installations?
A. Pipe wrench
B. Laser level or construction level
C. Torque wrench
D. Pressure gauge
B. Laser level or construction level
A laser level or suitable surveying instrument can establish elevations
and verify line and grade. Accurate elevation control is especially
important for gravity pipelines.
