 |  Construction Methods 48 Flashcards |  Start |
 | What does BCY stand for in earthwork calculations? |  Card: 1 / 48 |
| Bank Cubic Yards - soil volume in natural, undisturbed state | Card: 2 / 48 |
| True or False: Swell factor is always greater than 1.0 | Card: 3 / 48 |
| True. Soil expands when excavated, so loose volume exceeds bank volume | Card: 4 / 48 |
| The average end area method formula V = (A₁ + A₂)/2 × L calculates _____ | Card: 5 / 48 |
| Earthwork volume between two stations | Card: 6 / 48 |
| Which equipment is most economical for 800-foot haul distances? | Card: 7 / 48 |
| B) Scrapers - optimal for 300-3000 foot distances | Card: 8 / 48 |
| What happens to concrete workability as water-cement ratio decreases? | Card: 9 / 48 |
| Workability decreases but strength increases | Card: 10 / 48 |
| A slump test reading of 2 inches indicates _____ concrete | Card: 11 / 48 |
| Low slump concrete suitable for pavements | Card: 12 / 48 |
| True or False: Higher concrete placement rates increase lateral formwork pressure | Card: 13 / 48 |
| True. Faster placement creates higher pressure per ACI 347 formula | Card: 14 / 48 |
| What is the minimum OSHA excavation depth requiring protective systems? | Card: 15 / 48 |
| 5 feet deep | Card: 16 / 48 |
| Calculate BCY per scraper load: 20 LCY capacity, swell factor 1.25 | Card: 17 / 48 |
| 16 BCY (20 ÷ 1.25 = 16) | Card: 18 / 48 |
| Which soil type has maximum allowable slope of 1.5:1? | Card: 19 / 48 |
| C) Type C - least stable soil classification | Card: 20 / 48 |
| Optimum moisture content produces the _____ dry density in compaction | Card: 21 / 48 |
| Maximum | Card: 22 / 48 |
| True or False: Internal vibrators should be spaced 3-18 inches apart | Card: 23 / 48 |
| True. Spacing depends on vibrator radius of action | Card: 24 / 48 |
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| What does the 'S' represent in pile driving formulas? | Card: 25 / 48 |
| Set - penetration per hammer blow in inches | Card: 26 / 48 |
| A construction project requires 95% relative compaction. This means field density equals _____ of maximum laboratory density | Card: 27 / 48 |
| 95% | Card: 28 / 48 |
| Why must concrete temperature not exceed 95°F per ACI 301? | Card: 29 / 48 |
| D) All above - controls hydration rate and workability | Card: 30 / 48 |
| Wellpoint systems are limited to _____ feet single-stage drawdown | Card: 31 / 48 |
| 15-18 | Card: 32 / 48 |
| True or False: Critical path activities have zero total float | Card: 33 / 48 |
| True. They determine minimum project duration | Card: 34 / 48 |
| Calculate efficiency factor: equipment works 45 minutes per hour | Card: 35 / 48 |
| 0.75 (45 ÷ 60 = 0.75) | Card: 36 / 48 |
| Which foundation type requires tremie concrete placement in wet conditions? | Card: 37 / 48 |
| C) Drilled shafts - prevents contamination during underwater placement | Card: 38 / 48 |
| Apparent earth pressure for braced excavations in sand uses _____ distribution | Card: 39 / 48 |
| Rectangular pressure distribution per Peck's method | Card: 40 / 48 |
| True or False: Concrete reaches 100% design strength at 7 days | Card: 41 / 48 |
| False. 100% design strength typically achieved at 28 days | Card: 42 / 48 |
| A competent person must inspect excavations _____ and after rain events | Card: 43 / 48 |
| Daily | Card: 44 / 48 |
| What volume measure should match equipment capacity for productivity calculations? | Card: 45 / 48 |
| Loose cubic yards (LCY) for hauling equipment | Card: 46 / 48 |
| Maturity index M = Σ(T - T₀)Δt combines which two factors affecting concrete strength? | Card: 47 / 48 |
| Temperature and time | Card: 48 / 48 |
| Completed! Keep practicing to master all of them. |  Restart |
