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CMP 305 Exam with Complete Solution Graded A+ What does BMP stand for? - Answer-Best Management Process Part 91 - Answer-earth changes that disturb 1 or more acres of land or occurs within 500 feet of a body of water. County is delegated for the responsibility Certified Operator is respon...

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  • September 1, 2024
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  • 2024/2025
  • Exam (elaborations)
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CMP 305 Exam with Complete Solution
Graded A+

What does BMP stand for? - Answer-Best Management Process

Part 91 - Answer-earth changes that disturb 1 or more acres of land or occurs within
500 feet of a body of water.
County is delegated for the responsibility

Certified Operator is responsible for? - Answer-Site inspection each week w/in 24 hr. of
precipitation

BMP's can be for? - Answer-Vegetative
structural
managerial

What are buffer/filter strips - Answer-Grass strips to filter water, fertilizer, pesticides

Detention basin vs retention basin - Answer-Detention: has inlet and outlet for runoff

Retention: Retains water/sediment

Trencher vs. Horizontal Directional Drilling - Answer-Directional boring is less invasive
to the terrain. Less expensive in restoring the site

Horizontal Boring(directional boring) - Answer-force a hole thru soil and pull in a pipe

pipe jacking - Answer-work from a vertical shaft w/ massive push block

tunneling - Answer-self-contained machine with cutting face to cut and remove soil

Pipe Bursting - Answer-Follows the existing pipe and breaks the pipe as it replaces it.

What should you do if you hit an electric line while boring? - Answer-Jump off and land
on two feet. Scuffle your feet about 20 yards way.

Tension Cracks - Answer-occurs at a horizontal distance of .5 to .75 times the depth of
the trench measured from the top of the vertical face of the trench

Sliding - Answer-occurs as a result of tension cracks. The side wall of the trench gives
way.

, Toppling - Answer-Trench's vertical face separates down the tension crack and rolls in
the trench

Subsidence and Bulging - Answer-An unsupported trench wall can create an
unbalanced stress in the soil, causing the surface to subside and bulging of the vertical
face of the trench wall.

Heaving or Squeezing - Answer-Bottom shifting up is caused by the downward pressure
created by the weight of the adjoining soil. Also causes a bulge at the bottom of the cut.
Heaving can occur when shielding is properly installed

Site Investigation: Necessities for planning construction techniques - Answer-Site
Access, Type of construction equipment, ground water, surface water development

Documents for Evaluating the site - Answer-Soil Maps, topographic maps, aerial
photographs, USGS topographic quadrangle maps

Info obtained from soil profile - Answer-uniform soil conditions, number of borings and
bore spacing, type - size - weight of structure

Bore spacing for road work, one story building, multi story - Answer-Road - 500-1000'
one story - 100-200'
multi story - 50-100'

How far down does boring depth have to be? - Answer-until suitable soil bearing
capacity is found and depth of ground water(if needed)

Direct Exploration - Answer-Uses Test pit method, pit or trench, visual inspection,
limited depth 15-20', equipment: backhoe or excavator.

Advantages of Direct exploration - Answer-view soil profile(type and color)
obtain undisturbed sample

Disadvantages of Direct exploration - Answer-limited depth, ground water may limit
depth, safety(soil caving in)

Devices for in-place soil testing - Answer-Pocket penetrometer(TSF), torvane, thumb
penetration

Semi-direct exploration - Answer-Auger Drilling

Auger Types - Answer-Solid Auger: dry regions, auger removed for sampling(hole will
collapse), Hollow Auger: sampling thru the auger, faster taking samples, (split barrel,
shelby tube).

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