CDS Project Planning & Scheduling 2 — Questions and Answers
Question 1: During the planning phase of a demolition project, what is the PRIMARY purpose of a pre-demolition survey?
- To estimate labor costs
- To identify hazardous materials, structural elements, and site conditions (Correct answer)
- To obtain neighborhood approval
- To schedule equipment deliveries
Correct answer: To identify hazardous materials, structural elements, and site conditions
A pre-demolition survey identifies hazardous materials, structural vulnerabilities, and site conditions that affect safety planning and sequencing.
Question 2: Which scheduling method shows task dependencies using arrows and nodes to represent activities and their relationships?
- Gantt chart
- PERT/CPM network diagram (Correct answer)
- Linear schedule
- Resource histogram
Correct answer: PERT/CPM network diagram
PERT/CPM network diagrams use arrows and nodes to represent activities and their logical dependencies, identifying the critical path.
Question 3: A demolition contractor discovers underground fuel storage tanks not shown on original blueprints. What is the CORRECT next step?
- Continue work and remove tanks during excavation
- Stop work, notify the owner and regulatory agencies, and update the project plan (Correct answer)
- Proceed with surface demolition only
- Backfill over the tanks and document later
Correct answer: Stop work, notify the owner and regulatory agencies, and update the project plan
Undiscovered underground storage tanks require immediate work stoppage, notification of the owner and regulators, and project plan revision.
Question 4: In demolition project scheduling, 'float' or 'slack' refers to:
- The weight capacity of a crane
- The amount of time a task can be delayed without affecting the project completion date (Correct answer)
- Debris removed by water during cleanup
- The buffer zone around an exclusion perimeter
Correct answer: The amount of time a task can be delayed without affecting the project completion date
Float (or slack) is the amount of time a non-critical activity can be delayed without delaying the overall project completion date.
Question 5: When planning the sequence of demolition for a multi-story building, which general principle should guide the work order?
- Demolish load-bearing elements first to release tension
- Work from the bottom up to maintain structural stability
- Work from the top down to maintain structural stability (Correct answer)
- Demolish interior walls before removing the roof
Correct answer: Work from the top down to maintain structural stability
Demolition generally proceeds top-down so lower structural members continue to support remaining upper floors until they are removed.
Question 6: Which document specifies the types and amounts of salvageable materials to be recovered before full demolition begins?
- Shoring plan
- Selective demolition or deconstruction plan (Correct answer)
- Site safety plan
- Traffic control plan
Correct answer: Selective demolition or deconstruction plan
A selective demolition or deconstruction plan identifies salvageable materials, their locations, and the sequence for careful removal prior to full demolition.
Question 7: A CDS supervisor is developing a waste management plan. Which factor is MOST critical when planning debris hauling schedules?
- Color-coding of debris containers
- Volume of material generated per day matched to truck capacity and disposal site hours (Correct answer)
- Brand of trucks used
- Distance from the foreman's office to the site
Correct answer: Volume of material generated per day matched to truck capacity and disposal site hours
Matching daily debris volume to truck capacity and disposal site operating hours prevents bottlenecks and ensures continuous, compliant waste removal.
CDS Project Planning & Scheduling 2
During the planning phase of a demolition project, what is the PRIMARY purpose of a pre-demolition survey?