Survey Test 2 Flashcards
In the calibration of a level that test(s) used are?
Line of sight (quick peg test or 2 peg test)
Angels less than 90 degrees are called
Acute
GPS can best be described as
Group of satellites used by receiver on earth for navigation and surveying
Topographic features found on a site plan would include which group from the following selections?
Trees, hills, streams
The sum of the interior angels of a polygon with six sides is
720
Lines drawn on a map to represent a line of constant elevation on the ground are called
Contours
Lift drawings are used by a field engineer in construction for
What to construct, what to embed and where to locate
Main purpose of a rotary laser is
Create horizontal plane for elevation determination
Vertical axis, horizontal axis, line of sight, axis of level tube, plate level axis are
Principle lines on a transit/ theodolite
GPS technique where by data for a reciever at a known position is used to correct the date from a receiver at an unknown position is called
DGPS (Differential global position system)
Basic principles for calibrating all instruments and tools should include all except which of the following
Perform check during heat of the day
Pipe lasers (sewer Lasers) provide which important features used by field engineers (normal application)
Grade and lines
The GPS method in our lab activity utilized base receivers which communicated corrections to rover units which collected point positions immediately on site. This type of GPS method is
Real time kinematics
The structure of an angle turning instrument has 3 sections which are
Alidade, horizontal cycle, leveling section
Total stations measure 3 basic variables
Vertical angles, slope distance , horizontal angles
The distance from the instrument to the rod should be the same for backsight and foresights when doing differential leveling
False
Elevations determined by the usage of a total station are derived from which leveling process in the following group?
Trig leveling
Closing a level loop means
Establishing an elevation on a benchmark from a TP
Surveying measurements involved each of the following variables which should be avoided. Which of the two are larger?
Mistakes
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 dependence
Total station measures 3 basic variables which are used to calculate other info. The greatest source of error in using a total station is a result of?
Prism Pole
Optical plummets replaced plumb bobs on current transits. Which principle line does this device line up exactly with on the transit?
Vertical Axis
Construction surveying requiring the turning of angles involves methods which deliver high accuracies. Which of the following should always be performed when turning angles?
Long Backsight
A steel chain with a nominal length longer than the actual length would be considered what type of error?
Instrumental
Cross section leveling is a method of differential leveling which is often used in the construction of the following?
Levees
Benchmark is best described as
Point used in the differential leveling process with a known elevation
When laying out a distance of 100’ with a chain having actual length of 100.01’, how is the measured distance corrected when measuring between the 2 points.
Subtracted
Which of the following normally provides most of the survey control info on a jobsite?
Wooden stakes
The following term 229d 22’ 23’’ is best described by which of the following?
Azimuth
Distances measured in areas of different elevations require an improvised methodology, which of the following techniques describes this field application?
Breaking Chain
Record keeping is an important part of surveying. Which of the following is considered to be a legal document?``
Engineers field book
When measuring a distance with a steel tape, which of the following 4 selections has a minimal or no effect?`
Flat ground
Which of the following is not a basic rule for measuring a distance with a steel tape?
Measure in 1 direction only
When using an optical level, field engineers can focus both the cross hairs and image. Which of the following describes the situation of unfocused crosshairs?
Parallax
When reading a rod for determining elevations, a rod man should do which of the following?
Rock the rod back and forth slightly
Field angle used for the establishment of an accurate grid system, by measuring the direction and distance between a series of points called?
Traverse angels
Deflection angles are best described by which statement?
Angles measured off of a prlongation of a preceding line
Office duties performed by field engineers include all of the following except
Building design
Mechanical part of an automatic level which creates a horizontal line of sight is?
Compensator
Which field angle removes systematic errors from measured angles on job sites?
Direct and reverse
Three measurable values which determine the position of one point to another?
Direction, Distance, elevation
From the following list which one is used to measure distances?
Total Station
How many degrees are found in an 11 sided polygon?
1620
Field engineers and layout personnel are not qualified to perform which task from the following list?
Establish property lines and boundaries
When marking line or grade on a job site, which of the following best describes the placement of these markings?
Plumb, level, straight
Bucking the line in a leveling exercise is best described by which selection?
Using the same HI every day
Primary Control Points are what color?
Orange
Secondary Control Points are what color?
Yellow
Working control points are what color?
Pink
Describe lift drawings?
Info is lifted from numerous sources to create a single set
How are contours used by engineers?
to determine the amount of cut or fill for a project site
How could you “figure out” a triangle with no right angles?
Law of sines , law of cosines
How many satelites orbit the earth?
24
If GPS is American, then Glonass is ____ and Galileo is _____.
Russian, Europe
In laying out a point with the total station, how can you describe the process?
Guess and check
In using lasers, sites should not have above ____ degrees of signal obstruction.
20
What are plainimetric drawings?
They are drawings with human-made features such as roads, sidewalks and utilities
What are some applications of GPS?
Checking the plumpness of high rise buildings, collecting topgraphical data, excavation locations
What are some errors in GPS?
Orbiting errors, poor geometry, mulit-paths singals, clock errors
What are some horizontal applications of a laser?
Anchor bolts, establishing lines on a slab, pipelines
What are some vertical applications of a laser?
Plumbing elevator shafts, columns, walls,
What are the two types of lasers?
Visible light and electronic level
What can a laser “replace”?
Plumb bob, stringline, and level
What do lines in terms of plane geometry?
Connects two points
What does a total station measure?
Slope distance, horzontal angels and vertical angels
What is a point in terms of plane geomertry?
A position
What is the contour interval?
The vertical distance between each contour line
What is the purpose of lift drawings?
to accurately convey to the foreman what to construct, what to embed and where to locate
What should you do to factor in the weather for a total station?
Factor in a PPM factor
When calibrating angle measurements, how should you callibrate the horizontal axis?
Point to the tip of something high, bring it down, note, turn 180 and repeat
When calibrating chains what is the tolerance?
.02 ft should be discarded, .01 ft is acceptable
When calibrating instruments, they should not…
have parralax, be dirty or overtightened
When calibrating levels, how should the two peg test be approached?
Mark two points 200-300 feet apart with the same height, get in center and shoot. The difference is the error
When using a laser, what could be causing a false beam?
Refelctive surfaces
What is the accuracy requirements of the total staion?
3 sec or less
When using a total station,how much should the distance be limited too?
150-200 feet
When using a total station, what should you look out for in reference to weather?
Curvature and refraction
Which GPS systems should be used for construction?
Rapid Static GPS and Real Time Kinematics
Which one is better for longer distances and which one is better for shorter distances?
Total for longer, chains for shorter
Classes of lasers
Fixed, Rotated, Utility
