CVEN 303 - Final Exam
Closure Error - CORRECT ANSWER-Discrepancy between the known elevation of a
benchmark and its measured elevation at the end of a the survey route.
First order survey - CORRECT ANSWER-Closure error is
<= 3mm(K)^.5 to 5mm(K)^.5
<=.12ft(M)^.5 to .020ft(M)^.5
k=length of leveling route
M=length in miles
Second Order Survey - CORRECT ANSWER-Closure error is
<= 6mm(K)^.5 to 8mm(K)^.5
<=.024ft(M)^.5 to .034ft(M)^.5
k=length of leveling route
M=length in miles
Third Order Survey - CORRECT ANSWER-Closure error is
<= 12mm(K)^.5
<=.059ft(M)^.5
k=length of leveling route
M=length in miles
Purpose of Profile Leveling - CORRECT ANSWER-Determine the elevations of the
ground surface along the centerline or edges of a planned route feature and measure
location of route features.
Rate of Grade - CORRECT ANSWER-Vertical rise or fall/Horizontal Distance
-% - CORRECT ANSWER-How to express a falling grade
+% - CORRECT ANSWER-How to express a rising grade
NAVSTAR - CORRECT ANSWER-Navigation Satellite Timing and Ranging GPS
GPS Segments - CORRECT ANSWER-User segment (receivers and measurements)
Space Segment (satellites)
Control Segment (control stations)
Space Segment - CORRECT ANSWER-six orbits
four satellites in each orbit
takes twelve hours for each satellite to orbit
12,600 miles above the earth's surface
