Survey Test 1 Flashcards
When a field engineer uses an angle turning instrument it is necessary to locate the instrument exactly over a point. The device located on a total station which helps us set up over a point called?
Optical Plummett
The sum of the interior angles for a rectangle is
360 degrees
Understanding accuracy and precision is an important concept for a field engineer. Closeness of measurements is called _____ while attaining the true value is called ______.
Precision, Accuracy
Data Collectors enhance the operation of a total station but usage does have a few disadvantages. Which alternative from the following list poses a definite disadvantage?
Battery Dependnece
Precise topographic elevations on a jobsite are determined by using which instrument from the following list.
Total Station
Leveling field practices require good procedure to effectively remove errors and mistakes. From the following list which choice is a standard procedure to perform during the leveling process?
Balance back sights and foresights
Which of the following variables, from an ethical perspective is an attribute a construction surveyor should keep in consideration when preparing to work on a specific construction site?
Site is a natural resource.
The following term 22d 22’ 23” is best described by which?
Azmuith
Which of the following normally provides most of the survey control info on a jobsite?
Wooden Stakes
Three measurable values which determine the position of one point to another?
Direction,distance, elevation
Field engineers must be aware of many important concepts in the peformance of feild applications. When performing a series of measurements (angels,elevations,distances,) if all shots were very close this series of shots could be considered to have a high degree of?
Precision
Record keeping is an important part of surveying. Which of the following is considered to be a legal document?
Engineers field book
Working control points Fall 2014 can be distinguished by which color stake?
Pink
When leveling the optical plummet device which vial is used for fine “final” leveling?
Plate vial
When recording data in the field book certain guidelines should be followed. Which of the following is not a guide line?
Erasures are permitted
Reading on a rod held on a point whose elevation is known
Backsight
Elevation of the “LOS” of the instrument
Height of instrument
Reading on a rod held on a point whose elevation is Unknown
Foresight
Point used in the differential leveling process to temporarily transfer the elevation from the HI
Turning Point
End a Level Loop at a Known Benchmark (Either starting BM or another BM)
Closed Loop
Benchmark + Backsight=
(BM) + BS =
Height of instrument
(HI)
Height of Instrument - Foresight =
(HI) - (FS)=
Turning point (TP)
Adjust focus to eliminate the ________
Paralax
Closing the horizon with an angle turning instrument is best described by which statement.
Sum of angels turned equal to 360 degrees when turning back to original Backsight
The major difference between transits, optical theodolites, and digital theodolites is
Method of reading angles
Graduated rod used in leveling constructed of wood, fiberglass, or metal is called
Level Rod
3 Components of a Total Station
- Digital Transit Theodolite
- EDM
- Computer
3 basic measurements
- Scope Distance
- Horizontal Angle
- Vertical Angle ( Zenith Angle)
_________ are the communication tool used to locate the project
Construction stakes
_______ are used to communicate to the craftperson
Line and grade marks
The most important aspect of equipment care is to keep equipment _________
Clean
Hubs
Elevation
Stakes
Centerline
Lath
Guard Stake
Use a ______ and a ______ to assist in chaining horizontally.
Hand level, plumb bob
The _____ is the most critical part of angle layout
Backsight
Which of the following variables require considerations when measuring distances with an EDM?
Prism constant, Temp,Pressure (PPM)
The structure of angle measuring instruments has 3 sections which are?
Alidade, Horizontal Circle, Leveling Section
Which geometric relationship applies to a calibrated transit (angle turning instrument)
Line of sight perpendicular to Horizontal Axis
Leveling process of determining the difference in elevation between two points is
Differential Leveling
Hubs used for control should have a tolerance of
.01 Horizontal and .01 ft Vertical
Field engineers and layout personnel are not qualified to perform which tasks
Property lines and boundaries
Total Station measures 3 variables ?
Horizontal angels, vertical angles, slope distances
Topographic elevations often are determined by usage of a total station. This form of leveling is
Trigonometric leveling
The mecahnical part of an automatic level which creates a horizontal line of sight is called
compensator
Transferring an elevation into a multi story building is best accomplished by using which tool?
Calibrated Chain Tape
Determines elevations for lines perpendicular to the centerline and is useful in computation of volumes. ( Used for levees)
Cross sectional Leveling
Great for determining irregular shaped excavations ( useful for landfills)
Grid Leveling
leveling that minimizes the possibility for error
Three wire leveling
