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Tools & Equipment Operation Flashcards

7 cards from real AIC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Tools & Equipment Operation flashcards as text

  1. As a rule of thumb, how much grade resistance does each 1% of adverse grade add for a haul unit?

    Answer: 20 lb per ton of gross weight

    Each 1% of uphill grade adds about 20 lb of resistance per ton of gross vehicle weight.

  2. A haul road has a 3% uphill grade and a rolling resistance of 60 lb/ton. What is the effective grade?

    Answer: 6%

    60 lb/ton ÷ 20 lb/ton per % = 3%, plus the 3% grade, gives an effective grade of 6%.

  3. An excavation yields 100 bank cubic yards of soil with a 25% swell factor. How many loose cubic yards must be hauled?

    Answer: 125 LCY

    Loose volume = bank volume × (1 + swell) = 100 × 1.25 = 125 LCY.

  4. Which of the following is classified as an operating cost rather than an ownership cost for construction equipment?

    Answer: Fuel

    Fuel is used only while the machine runs, so it is an operating cost; depreciation, insurance, and taxes are ownership costs.

  5. A loader costs $200,000 with an estimated $20,000 salvage value and a 5-year life. What is the annual straight-line depreciation?

    Answer: $36,000

    ($200,000 − $20,000) ÷ 5 years = $36,000 per year.

  6. How is the number of scrapers that one push-dozer can efficiently serve usually estimated?

    Answer: Scraper cycle time divided by pusher cycle time

    Dividing the scraper cycle time by the pusher cycle time gives the number of scrapers one pusher can keep busy.

  7. Which compaction equipment is best suited to cohesive clay soils?

    Answer: Sheepsfoot (padfoot) roller

    Sheepsfoot rollers knead and compact cohesive soils from the bottom of the lift upward.

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