CPE Construction Equipment Costs & Management 2 — Questions and Answers
Question 1: The Caterpillar Performance Handbook is primarily used in construction estimating to:
- Calculate IRS tax depreciation schedules for Caterpillar equipment
- Determine competitive rental rates for equipment bidding
- Obtain equipment production rates and performance data for cycle time calculations (Correct answer)
- Compare insurance premiums across equipment manufacturers
Correct answer: Obtain equipment production rates and performance data for cycle time calculations
The Caterpillar Performance Handbook provides detailed production rates, machine specifications, and performance data used to calculate equipment cycle times and output in estimates.
Question 2: In earthwork estimating, 'bank measure' (BCM or BCY) refers to material:
- After excavation, in its loose and expanded state
- As it will be placed and compacted in the fill area
- In its natural, undisturbed, in-place condition (Correct answer)
- After processing through a screening or crushing plant
Correct answer: In its natural, undisturbed, in-place condition
Bank measure describes material in its natural undisturbed state before excavation; this is the baseline measurement from which swell and shrinkage factors are applied.
Question 3: The 'swell factor' in earthwork and equipment estimating accounts for:
- Increased material density after compaction in the fill
- Volume increase when soil is excavated from its natural undisturbed state (Correct answer)
- Moisture absorption by soil during rainy conditions
- Expansion of soil due to freeze-thaw cycles
Correct answer: Volume increase when soil is excavated from its natural undisturbed state
Swell factor reflects the volume increase—typically 10–40% depending on soil type—that occurs when soil is broken up and loosened during excavation.
Question 4: Job efficiency factor is applied to ideal equipment production rates in estimating to account for:
- Manufacturer tolerances in rated equipment horsepower
- The difference between ideal operating conditions and actual field conditions (Correct answer)
- Operator overtime pay rates on prevailing wage projects
- Equipment fuel efficiency variation by altitude
Correct answer: The difference between ideal operating conditions and actual field conditions
Job efficiency factors (typically expressed as a percentage of ideal output) adjust theoretical production rates to reflect real-world conditions such as operator skill, grade, surface conditions, and management effectiveness.
Question 5: A crawler-mounted excavator is generally preferred over a wheel-mounted excavator when:
- Frequent transport between widely separated project sites is required
- Operations occur primarily on finished paved surfaces
- Working in soft, muddy, or unstable ground conditions (Correct answer)
- Minimizing noise and vibration in urban environments is the priority
Correct answer: Working in soft, muddy, or unstable ground conditions
Crawler excavators distribute weight over a larger track surface area, providing superior stability and flotation in soft or unstable ground where wheeled machines would sink or lose traction.
Question 6: When performing a rent-versus-buy analysis for construction equipment, the financial 'break-even point' is defined as:
- When the equipment purchase price equals one year of rental costs
- When total cost of ownership equals total cost of renting for the same time period and use (Correct answer)
- When annual depreciation equals the annual insurance premium
- When cumulative operating costs exceed the original purchase price
Correct answer: When total cost of ownership equals total cost of renting for the same time period and use
The break-even point occurs when the total life-cycle cost of ownership (depreciation, interest, insurance, maintenance) equals what renting would have cost for the same utilization period.
Question 7: In equipment production estimating, 'cycle time' is defined as:
- The total number of operating hours in an equipment's useful life
- The elapsed time required to complete one full work cycle of an operation (Correct answer)
- The interval between scheduled preventive maintenance services
- The time required to mobilize equipment to a new job site
Correct answer: The elapsed time required to complete one full work cycle of an operation
Cycle time is the total time for one complete operation cycle (e.g., load, haul, dump, return for a truck), which directly determines production output per hour when divided into 60 minutes.
CPE Construction Equipment Costs & Management 2
The Caterpillar Performance Handbook is primarily used in construction estimating to: