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Questions and Answers
What is the same as a 100% slope?
What is the same as a 100% slope?
Which statement about wellpoint dewatering systems is True except
Which statement about wellpoint dewatering systems is True except
What term describes a downhill slope?
What term describes a downhill slope?
What advantage does a nuclear compaction test have over other methods?
What advantage does a nuclear compaction test have over other methods?
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What should be done with saturated silt or clay soil if compaction is an issue?
What should be done with saturated silt or clay soil if compaction is an issue?
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What type of rock is considered the easiest to rip?
What type of rock is considered the easiest to rip?
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What does a contour line represent?
What does a contour line represent?
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Which equipment is best suited for excavating shallow trenches with cross lines?
Which equipment is best suited for excavating shallow trenches with cross lines?
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Which type of rock material is likely to significantly decrease dozer production rates?
Which type of rock material is likely to significantly decrease dozer production rates?
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How do coarse sand and gravel respond to compaction methods that involve water and vibration?
How do coarse sand and gravel respond to compaction methods that involve water and vibration?
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What is the recommended slope angle for average soils?
What is the recommended slope angle for average soils?
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In a topographical map, what do contour lines that form a closed loop signify?
In a topographical map, what do contour lines that form a closed loop signify?
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What type of pipe is commonly used for distributing gas behind concealed walls?
What type of pipe is commonly used for distributing gas behind concealed walls?
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What is the maximum spacing between posts for silt fences?
What is the maximum spacing between posts for silt fences?
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What type of pipe is primarily used for transporting drinking water?
What type of pipe is primarily used for transporting drinking water?
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What is the adjusted production rate in bank cubic yards when the optimum hourly production rate is 700 loose cubic yards with a 35% swell factor?
What is the adjusted production rate in bank cubic yards when the optimum hourly production rate is 700 loose cubic yards with a 35% swell factor?
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What type of slope is indicated by contour lines that are spaced further apart at the peak than at the bottom?
What type of slope is indicated by contour lines that are spaced further apart at the peak than at the bottom?
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What should be the maximum height above the pipe when positioning a trench box for safety?
What should be the maximum height above the pipe when positioning a trench box for safety?
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What is the thrust block surface area required for an 8 inch pipe carrying 100 psi with a 45 degree fitting and the elbow resting on sand?
What is the thrust block surface area required for an 8 inch pipe carrying 100 psi with a 45 degree fitting and the elbow resting on sand?
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What is the average cycle time for a wheeled backhoe (14-foot hoe) digging an 8-foot trench in hardpan?
What is the average cycle time for a wheeled backhoe (14-foot hoe) digging an 8-foot trench in hardpan?
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Which of the following materials will most likely slow down dozer production rates?
Which of the following materials will most likely slow down dozer production rates?
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What type of dozing technique can help reduce the amount of load lost during transport?
What type of dozing technique can help reduce the amount of load lost during transport?
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What is the angle of repose for compacted sharp sand?
What is the angle of repose for compacted sharp sand?
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Which type of soil is indicated for hauling away and replacing when it becomes saturated and compaction is problematic?
Which type of soil is indicated for hauling away and replacing when it becomes saturated and compaction is problematic?
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What do contour lines that are closer together on a topographical map indicate?
What do contour lines that are closer together on a topographical map indicate?
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Coarse-grained soils like gravel are known to withstand what condition effectively?
Coarse-grained soils like gravel are known to withstand what condition effectively?
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What type of pipe is typically used at the top of a water heater?
What type of pipe is typically used at the top of a water heater?
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What is the primary reason a tracked backhoe is considered the best equipment for digging in soft soil?
What is the primary reason a tracked backhoe is considered the best equipment for digging in soft soil?
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What is the maximum angle of repose for average soils?
What is the maximum angle of repose for average soils?
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What effect does adequate boosting have on scrapers while spreading soil?
What effect does adequate boosting have on scrapers while spreading soil?
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What is the minimum post depth recommended for silt fences?
What is the minimum post depth recommended for silt fences?
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Study Notes
Pipe & Excavation - General Information
- A 100% slope is equivalent to a 45-degree angle.
- Wellpoint dewatering systems are not the most effective method in fine-grain soils. Other methods are better suited for such soils.
- A downhill slope is a negative grade.
- Adequate boosting of scrapers allows them to spread soil effectively in front of a bowl.
- An advantage of nuclear compaction tests compared to other methods is that they don't require removing samples from the test site.
- Coarse-grained soils (like gravel) tend to withstand greater stress or compaction.
Pipe & Excavation - Saturation & Soil Issues
- If a job site has saturated silt or clay soil that impacts compaction, use dry replacement soil.
- Sedimentary rock is the easiest type to rip.
Pipe & Excavation - Equipment & Techniques
- Slot dozing is a technique that minimizes load loss during transit.
- The average cycle time for a 14-foot wheeled backhoe digging an 8-foot trench in hardpan is 18 seconds.
- Tracked backhoes are the best for trenching in soft soil.
- When positioning a trench box, it should be centered over the pipe, and no more than 5 feet above it for safety.
- Wheeled/rubber tire backhoes are used for shallow trenches with cross lines.
- Materials that significantly reduce dozer production rates are not specified
Pipe & Excavation - Soil Types & Compaction
- Course sand and gravel compact well with water and vibration.
- The surface area of a 8-inch pipe with a 45-degree fitting's thrust block bearing against sand in 100 psi conditions is 4.1 sqft.
- The maximum angle of repose for average soils is 1:1.
- The recommended slope for average soils is 45 degrees.
- Contour lines on a topographical map that form closed loops represent a summit or depression.
Pipe & Excavation - Slopes & Pipe Types
- Contour lines that are closer together on a map indicate an increase in slope.
- Concave slopes have contour lines closer to the peak than to the bottom.
- Type M copper pipe is commonly used to connect to a water heater.
- Black pipe is often used for gas distribution behind concealed walls.
- Maximum spacing between posts for silt fences: 6 feet, minimum post depth: 12 inches.
- Angle of repose for compacted sharp sand is not specified
Pipe & Excavation - Materials & Tests
- Copper pipe is the most commonly used for drinking water.
- Soil pipe is not primarily used for liquids, but rather for solids.
- Percolation tests are commonly required for septic tank drainfields.
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Description
Test your knowledge on essential concepts of pipe and excavation, including soil types, compaction methods, and equipment techniques. This quiz covers various aspects from slope angles to effective dewatering systems. Perfect for those involved in construction and civil engineering.
