CO Structural Demolition Contractor Exam
Questions and Correct Answers (Verified
Answers) Plus Rationale 2027 Q&A|
Instant Download Pdf
1. What is the primary purpose of a pre-demolition engineering
survey?
A. To determine the final disposal cost
B. To identify the building's paint colors
C. To evaluate structural conditions and hazards before demolition
D. To establish the contractor's profit margin
Answer: C. To evaluate structural conditions and hazards before
demolition
Rationale: A pre-demolition engineering survey helps identify structural
systems, deterioration, unstable conditions, hazardous materials, and
other factors that can affect the safe sequence of demolition. This
,information is essential for planning protective measures and
preventing unintended collapse.
2. Before structural demolition begins, which utility-related action is
most important?
A. Increase water pressure
B. Disconnect, cap, or otherwise control utilities serving the structure
C. Remove all utility meters without documentation
D. Leave utilities energized until demolition is complete
Answer: B. Disconnect, cap, or otherwise control utilities serving the
structure
Rationale: Active electrical, gas, water, steam, or other utility services
can create serious hazards during demolition. Utilities should be
properly identified and controlled before work begins, with appropriate
verification that hazardous services are no longer creating exposure.
3. Which condition presents the greatest immediate concern when
inspecting a partially demolished building?
A. Freshly painted walls
B. Decorative flooring
C. Unstable structural members
D. Recently installed lighting
,Answer: C. Unstable structural members
Rationale: Partially demolished structures can become unstable as load
paths are altered. Unstable beams, columns, walls, slabs, or connections
may collapse unexpectedly and can endanger workers and nearby
property.
4. What is a major purpose of establishing a controlled demolition
sequence?
A. To maximize debris production
B. To prevent uncontrolled structural collapse
C. To eliminate the need for supervision
D. To reduce the number of required inspections
Answer: B. To prevent uncontrolled structural collapse
Rationale: Demolition must generally proceed according to a planned
sequence that maintains structural stability until members are
intentionally removed. An uncontrolled sequence can cause progressive
collapse, falling materials, equipment instability, and worker injuries.
5. Which document is most useful for understanding the original
structural system before demolition?
A. Employee attendance sheet
B. Structural drawings and available construction documents
, C. Equipment fuel log
D. Waste disposal receipt
Answer: B. Structural drawings and available construction documents
Rationale: Structural drawings can reveal load-bearing walls, beams,
columns, slabs, connections, foundations, and other components. They
should be compared with field conditions because existing construction
may differ from the original plans.
6. When demolition could affect an adjacent building, what should
be done?
A. Assume the adjacent building is independent
B. Ignore it if no occupants are visible
C. Evaluate the potential effects and provide appropriate protection
D. Remove the shared wall first
Answer: C. Evaluate the potential effects and provide appropriate
protection
Rationale: Adjacent structures may share walls, foundations, utilities, or
other structural elements. Demolition activities can transmit loads,
vibration, or movement to neighboring property, so conditions must be
evaluated and protective measures established.
Questions and Correct Answers (Verified
Answers) Plus Rationale 2027 Q&A|
Instant Download Pdf
1. What is the primary purpose of a pre-demolition engineering
survey?
A. To determine the final disposal cost
B. To identify the building's paint colors
C. To evaluate structural conditions and hazards before demolition
D. To establish the contractor's profit margin
Answer: C. To evaluate structural conditions and hazards before
demolition
Rationale: A pre-demolition engineering survey helps identify structural
systems, deterioration, unstable conditions, hazardous materials, and
other factors that can affect the safe sequence of demolition. This
,information is essential for planning protective measures and
preventing unintended collapse.
2. Before structural demolition begins, which utility-related action is
most important?
A. Increase water pressure
B. Disconnect, cap, or otherwise control utilities serving the structure
C. Remove all utility meters without documentation
D. Leave utilities energized until demolition is complete
Answer: B. Disconnect, cap, or otherwise control utilities serving the
structure
Rationale: Active electrical, gas, water, steam, or other utility services
can create serious hazards during demolition. Utilities should be
properly identified and controlled before work begins, with appropriate
verification that hazardous services are no longer creating exposure.
3. Which condition presents the greatest immediate concern when
inspecting a partially demolished building?
A. Freshly painted walls
B. Decorative flooring
C. Unstable structural members
D. Recently installed lighting
,Answer: C. Unstable structural members
Rationale: Partially demolished structures can become unstable as load
paths are altered. Unstable beams, columns, walls, slabs, or connections
may collapse unexpectedly and can endanger workers and nearby
property.
4. What is a major purpose of establishing a controlled demolition
sequence?
A. To maximize debris production
B. To prevent uncontrolled structural collapse
C. To eliminate the need for supervision
D. To reduce the number of required inspections
Answer: B. To prevent uncontrolled structural collapse
Rationale: Demolition must generally proceed according to a planned
sequence that maintains structural stability until members are
intentionally removed. An uncontrolled sequence can cause progressive
collapse, falling materials, equipment instability, and worker injuries.
5. Which document is most useful for understanding the original
structural system before demolition?
A. Employee attendance sheet
B. Structural drawings and available construction documents
, C. Equipment fuel log
D. Waste disposal receipt
Answer: B. Structural drawings and available construction documents
Rationale: Structural drawings can reveal load-bearing walls, beams,
columns, slabs, connections, foundations, and other components. They
should be compared with field conditions because existing construction
may differ from the original plans.
6. When demolition could affect an adjacent building, what should
be done?
A. Assume the adjacent building is independent
B. Ignore it if no occupants are visible
C. Evaluate the potential effects and provide appropriate protection
D. Remove the shared wall first
Answer: C. Evaluate the potential effects and provide appropriate
protection
Rationale: Adjacent structures may share walls, foundations, utilities, or
other structural elements. Demolition activities can transmit loads,
vibration, or movement to neighboring property, so conditions must be
evaluated and protective measures established.
