CO Demolition Contractor Exam Questions
and Correct Answers (Verified Answers)
Plus Rationale 2027 Q&A| Instant
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1. What is the primary purpose of conducting a pre-demolition
survey?
A. To determine the color of the building
B. To identify structural conditions, hazardous materials, and site
hazards
C. To estimate the resale value of the property
D. To determine the number of workers needed for cleanup
Answer: B. To identify structural conditions, hazardous materials, and
site hazards
Rationale: A pre-demolition survey provides essential information
about the building before work begins. It helps identify structural
weaknesses, utilities, hazardous materials, adjacent structures, and
,other conditions that could affect the demolition method and worker
safety.
2. Before beginning demolition, which condition should be verified
regarding electrical service?
A. The electrical system is operating at maximum capacity
B. All temporary lights are connected
C. Electrical utilities have been properly disconnected or controlled
D. Electrical panels have been painted
Answer: C. Electrical utilities have been properly disconnected or
controlled
Rationale: Uncontrolled electrical service can expose workers to
electrocution, arc flash, fire, and other hazards. Utility disconnection
or appropriate control must be coordinated before demolition begins.
3. Which structural component generally carries loads from floors or
roofs down toward the foundation?
A. Finish flooring
B. Load-bearing column
C. Interior partition
D. Window frame
Answer: B. Load-bearing column
,Rationale: Columns are vertical structural members that transfer
loads to lower structural elements and ultimately to the foundation.
Removing a load-bearing column without proper engineering can
cause partial or complete structural collapse.
4. What is the greatest concern when removing a load-bearing wall
during demolition?
A. Dust accumulation
B. Loss of structural support
C. Paint discoloration
D. Noise from hand tools
Answer: B. Loss of structural support
Rationale: Load-bearing walls support portions of the building above
them. Their removal can redistribute loads and cause unexpected
collapse unless temporary supports and an engineered sequence are
provided.
5. Which method is commonly used to control airborne dust during
demolition?
A. Increasing demolition speed
B. Applying water at the point of dust generation
, C. Closing all access doors
D. Removing all ventilation equipment
Answer: B. Applying water at the point of dust generation
Rationale: Controlled wetting can reduce airborne dust generated by
activities such as concrete breaking, masonry removal, and debris
handling. Water application must be managed so it does not create
electrical or slip hazards.
6. What is the purpose of temporary shoring during demolition?
A. To improve the appearance of the structure
B. To provide temporary structural support
C. To reduce the amount of debris
D. To eliminate the need for inspections
Answer: B. To provide temporary structural support
Rationale: Shoring supports structural elements temporarily when
existing members are removed, weakened, or exposed during
demolition. It helps maintain stability while the planned demolition
sequence proceeds.
7. Why should demolition generally proceed according to a planned
sequence?
and Correct Answers (Verified Answers)
Plus Rationale 2027 Q&A| Instant
Download Pdf
1. What is the primary purpose of conducting a pre-demolition
survey?
A. To determine the color of the building
B. To identify structural conditions, hazardous materials, and site
hazards
C. To estimate the resale value of the property
D. To determine the number of workers needed for cleanup
Answer: B. To identify structural conditions, hazardous materials, and
site hazards
Rationale: A pre-demolition survey provides essential information
about the building before work begins. It helps identify structural
weaknesses, utilities, hazardous materials, adjacent structures, and
,other conditions that could affect the demolition method and worker
safety.
2. Before beginning demolition, which condition should be verified
regarding electrical service?
A. The electrical system is operating at maximum capacity
B. All temporary lights are connected
C. Electrical utilities have been properly disconnected or controlled
D. Electrical panels have been painted
Answer: C. Electrical utilities have been properly disconnected or
controlled
Rationale: Uncontrolled electrical service can expose workers to
electrocution, arc flash, fire, and other hazards. Utility disconnection
or appropriate control must be coordinated before demolition begins.
3. Which structural component generally carries loads from floors or
roofs down toward the foundation?
A. Finish flooring
B. Load-bearing column
C. Interior partition
D. Window frame
Answer: B. Load-bearing column
,Rationale: Columns are vertical structural members that transfer
loads to lower structural elements and ultimately to the foundation.
Removing a load-bearing column without proper engineering can
cause partial or complete structural collapse.
4. What is the greatest concern when removing a load-bearing wall
during demolition?
A. Dust accumulation
B. Loss of structural support
C. Paint discoloration
D. Noise from hand tools
Answer: B. Loss of structural support
Rationale: Load-bearing walls support portions of the building above
them. Their removal can redistribute loads and cause unexpected
collapse unless temporary supports and an engineered sequence are
provided.
5. Which method is commonly used to control airborne dust during
demolition?
A. Increasing demolition speed
B. Applying water at the point of dust generation
, C. Closing all access doors
D. Removing all ventilation equipment
Answer: B. Applying water at the point of dust generation
Rationale: Controlled wetting can reduce airborne dust generated by
activities such as concrete breaking, masonry removal, and debris
handling. Water application must be managed so it does not create
electrical or slip hazards.
6. What is the purpose of temporary shoring during demolition?
A. To improve the appearance of the structure
B. To provide temporary structural support
C. To reduce the amount of debris
D. To eliminate the need for inspections
Answer: B. To provide temporary structural support
Rationale: Shoring supports structural elements temporarily when
existing members are removed, weakened, or exposed during
demolition. It helps maintain stability while the planned demolition
sequence proceeds.
7. Why should demolition generally proceed according to a planned
sequence?
