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CMP 305 Exam| Questions with 100% Correct Verified answers
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CMP 305 Exam| Questions with 100% Correct Verified answers
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CMP 305 Exam| Questions with 100%Correct Verified answers
Types of Leveling - ✔✔- Differential Level
- Profile
- Topographic
Differential Leveling - ✔✔Finding difference in elevation between 2 points
Profile leveling - ✔✔determining the elevation of points at measured distances
along a selected line
Topographic leveling - ✔✔determining the elevation of spaced grid
points - uses contour lines
Accuracy of differential leveling depends on...
and common mistake - ✔✔- centering of bubble
- keeping the rod vertical
- equal sight distances for the BS and FS
- length of sight: be practical
-common mistake: reading wrong foot mark
Types of Levels - ✔✔construction level
self compensating
construction level - ✔✔- dumpy 10-20x
,- simple
- straight line measurements
self compensating - ✔✔- easier to use
- what we use in lab
Transit and theodolites - ✔✔- both work in the horizontal and vertical plane
- rotate angles
- vertical measurements
- transit is more traditional, few automated features
- theodolite can read angles ver y accurately of up to 1 sec of an arc
EDMI - ✔✔electronic distance measuring instrument
Total station - ✔✔theodolite with a computer
laser level - ✔✔- cost is higher than straight line
- distance 500' - 1000'
- adv. only one person is needed to get work done
- can be mounted by construction equipment (ex. dozer)
GPS - ✔✔global positioning systems
Scales Vernier Readings - ✔✔-degree , minute=' , seconds = "
, linear measurements - ✔✔- pacing
- odometer: wheel
- stadia: length between top and bottom stadia is 1/100 of the distance between
the instrument and the rod
- taping; steel, fiberglass or fabric, length ranges to 500 feet
Record keeping - ✔✔Field book
- left side is actual instrument readings (numbers)
- right side is picture
site prep - ✔✔identify special requirements
- historical sites, trees, natural water supply
- storm water run off control
- barriers around trees so they don't
die mark property lines
heavy equipment operators
prepare for rough grading - ✔✔- study plot plans and specs
- look at contour lines for site grading
- establish benchmarks
- top soils stripped and piled or hauled
soil removal (2 methods) - ✔✔- grid
method * rough grade grid lines in intervals of
100'
- radial staking: total station
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