CO Demolition Contractor Exam Questions
and Correct Answers (Verified Answers)
Plus Rationale 2027 Q&A| Instant
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1. Before demolition begins, what is one of the most important
responsibilities of the contractor?
A. Begin removing nonstructural walls immediately
B. Verify the building has been properly surveyed and hazardous
materials identified
C. Remove all windows first
D. Shut off only the building's water supply
Rationale: A pre-demolition survey helps identify structural conditions,
hazardous materials, utilities, and other hazards. This information
allows the contractor to establish a safe demolition sequence and
appropriate controls before work begins.
, 2. Which condition presents the greatest immediate concern when
demolishing a partially collapsed structure?
A. Paint color
B. Interior finishes
C. Unstable structural elements
D. Floor covering type
Rationale: Partially collapsed structures may contain weakened walls,
floors, roofs, and framing that can fail without warning. Structural
instability must be evaluated and controlled before workers enter or
continue demolition.
3. What should be done with electrical power before demolition
work begins in an area containing electrical systems?
A. Cover the outlets with tape
B. Leave power on for temporary lighting
C. Have the electrical system de-energized and properly isolated
D. Remove light bulbs only
Rationale: De-energization and isolation reduce the risk of electrical
shock, arc flash, and accidental energization. Lockout/tagout
procedures should be used where applicable.
, 4. Which demolition method involves dismantling a structure
systematically from the top downward?
A. Implosion
B. Burning
C. Top-down demolition
D. Flood demolition
Rationale: Top-down demolition removes structural components in a
controlled sequence, generally progressing from upper levels toward the
foundation. It is commonly used where surrounding property must be
protected.
5. What is the primary purpose of a demolition plan?
A. Determine the building's resale value
B. Select interior paint colors
C. Establish the safe sequence, methods, equipment, and controls for
demolition
D. Eliminate the need for worker training
Rationale: A demolition plan provides a structured approach to the
work. It addresses sequencing, equipment, structural stability, utilities,
access, debris handling, public protection, and other hazards.
, 6. Why should demolition debris be removed regularly from work
areas?
A. To make the building look finished
B. To increase noise levels
C. To reduce trip, fall, fire, and structural loading hazards
D. To eliminate the need for protective equipment
Rationale: Accumulated debris can obstruct access, create trip hazards,
increase fire loading, and impose additional loads on floors. Regular
removal keeps the work area safer and more manageable.
7. When demolishing a load-bearing wall, what must be considered
before removal?
A. The wall's paint thickness
B. The age of the windows
C. How loads supported by the wall will be transferred or supported
D. The color of adjacent walls
Rationale: Removing a load-bearing wall without providing adequate
temporary or permanent support can cause a partial or complete
structural collapse. The load path must be evaluated before demolition.
8. What is the purpose of temporary shoring during demolition?
and Correct Answers (Verified Answers)
Plus Rationale 2027 Q&A| Instant
Download Pdf
1. Before demolition begins, what is one of the most important
responsibilities of the contractor?
A. Begin removing nonstructural walls immediately
B. Verify the building has been properly surveyed and hazardous
materials identified
C. Remove all windows first
D. Shut off only the building's water supply
Rationale: A pre-demolition survey helps identify structural conditions,
hazardous materials, utilities, and other hazards. This information
allows the contractor to establish a safe demolition sequence and
appropriate controls before work begins.
, 2. Which condition presents the greatest immediate concern when
demolishing a partially collapsed structure?
A. Paint color
B. Interior finishes
C. Unstable structural elements
D. Floor covering type
Rationale: Partially collapsed structures may contain weakened walls,
floors, roofs, and framing that can fail without warning. Structural
instability must be evaluated and controlled before workers enter or
continue demolition.
3. What should be done with electrical power before demolition
work begins in an area containing electrical systems?
A. Cover the outlets with tape
B. Leave power on for temporary lighting
C. Have the electrical system de-energized and properly isolated
D. Remove light bulbs only
Rationale: De-energization and isolation reduce the risk of electrical
shock, arc flash, and accidental energization. Lockout/tagout
procedures should be used where applicable.
, 4. Which demolition method involves dismantling a structure
systematically from the top downward?
A. Implosion
B. Burning
C. Top-down demolition
D. Flood demolition
Rationale: Top-down demolition removes structural components in a
controlled sequence, generally progressing from upper levels toward the
foundation. It is commonly used where surrounding property must be
protected.
5. What is the primary purpose of a demolition plan?
A. Determine the building's resale value
B. Select interior paint colors
C. Establish the safe sequence, methods, equipment, and controls for
demolition
D. Eliminate the need for worker training
Rationale: A demolition plan provides a structured approach to the
work. It addresses sequencing, equipment, structural stability, utilities,
access, debris handling, public protection, and other hazards.
, 6. Why should demolition debris be removed regularly from work
areas?
A. To make the building look finished
B. To increase noise levels
C. To reduce trip, fall, fire, and structural loading hazards
D. To eliminate the need for protective equipment
Rationale: Accumulated debris can obstruct access, create trip hazards,
increase fire loading, and impose additional loads on floors. Regular
removal keeps the work area safer and more manageable.
7. When demolishing a load-bearing wall, what must be considered
before removal?
A. The wall's paint thickness
B. The age of the windows
C. How loads supported by the wall will be transferred or supported
D. The color of adjacent walls
Rationale: Removing a load-bearing wall without providing adequate
temporary or permanent support can cause a partial or complete
structural collapse. The load path must be evaluated before demolition.
8. What is the purpose of temporary shoring during demolition?
