Flashcards in Pipe & Excavation Deck (51)
The advantage of an U blade over an Semi-U blade is it:
Holds more material
The best piece of equipment to strip material over a long distance is a:
What is the purpose of a trench box?
To support a wall of soil
When positioning a trench box it is always centered over the pipe. To maintain safety in the ditch, the maximum height above the pipe you should install a trench box is:
The easiest type of rock to rip is:
The percent of a slope which rises at a 45-degree angle is:
A reference stake is 16.4" from the hub. Fill is to be stated at a distance of 6.8" from the hub. Distances are measured how?
Before making a pass, what should the dozer be aligned with?
Blade dump area
The level of underground water is called:
Soil that has the maximum amount of water it can hold is called:
Slot dozing has what advantage?
It helps transfer more soil
What is the best piece of equipment to dig a trench in soft soil?
What is the problem with excavation in narrow spaces?
You cannot easily add water necessary for wetting
The best method to use to estimate earthwork is to:
Divide into sections
What will increase the productivity of a self-loading scraper in muddy soil?
A dozer pushing on the push blocks at the rear of the bowl
The effect of loading uphill using a scraper is:
It increases cycle time
What is the hardest part of the grader's work?
The advantage to using an angle blade over a straight blade is to:
The type of blade preferred when pushing soil over long distances is:
What is the best dozer to use for landscaping?
Light utility dozer
If an operator fails to lift, tilt, and angle the blade of a dozer just right:
Most of the load is lost
The amount of water required for a given soil to reach maximum density is known as the:
Optimum moisture content
The advantage of nuclear compaction testing is:
You do not have to remove the soil from the site
If you are working a job that has silt or clay soil that has become saturated and compaction is an issue, what should you do?
Haul it away and replace it with dry soil
What do contour lines show?
They connect points of the same elevation above or below a reference
Load factor =
Bank volume divided by bank volume + swell factor
The best piece of vibratory compaction equipment in situations where you have a wide trench and no cross-lines is:
Horizontal distances are measured with a:
A well-point system is the best method for dewatering in: