Deck 7: Plane Survey Calculation

Question 1

Which of the following equations are used to compute latitudes and departures of traverses?
I. latitude = cos bearing x length of course
II. departure = sin bearing x length of course
III. tan bearing = latitude/departure

A)I, II
B)I, III
C)II, III
D)None of the above.

Answer 1

I, II

Question 2

The term "total station" is used to describe:

A)An electronic distance measurement device that measures distances and angles.
B)A location on a route or line where a moving vehicle may stop for fuel, drop off goods or passengers, or purchase caffeinated beverages.
C)Sections along a route or line that are 100 feet in length.
D)None of the above

Answer 2

An electronic distance measurement device that measures distances and angles.

Question 3

The magnetic declination at a point was measured as 07°25' in 1925 and 14°50' in 2010. If line DE had a magnetic bearing of N45°25'E in 2010, what was the magnetic bearing of the line in 1925?

A)N38°00'E
B)N45°25'E
C)N52°50'E
D)None of the above

Answer 3

N38°00'E

Question 4

Which of the following statements best describes that is meant by the term "balancing a survey"?

A)Correcting all angles to fit the traverse.
B)Adjusting the fieldwork to correspond to the geometric values.
C)Making all sights equal in length.
D)None of the above

Question 5

When slope staking, upon which of the following is the position of a stake dependent?

A)Elevation of the ground and base
B)Width of the base
C)Slope of the sides
D)All of the above

Question 6

What is the relative accuracy (in nearest 100 ft) of a given traverse of 50,000 ft that failed to close by 0.25 ft in the northing and 0.50 ft in the easting.

A)1:89,400
B)1:118,422
C)1:118,400
D)None of the above

Question 7

Relative Positional Accuracy is best determined by least squares adjustment of a survey using GPS data for which of the following reasons?

A)Errors are distributed following laws of random probability.
B)It is the only adjustment method able to handle complex networks.
C)The sum of squared residuals is minimized.
D)All of the above

Question 8

Resectioning is a process undertaken to accomplish which of the following?

A)Determine where survey stakes are to be set
B)Close a traverse
C)Locate a single point by measuring horizontal angles from the point to three visible stations with known positions
D)None of the above

Question 9

What is the radius of a 9.25° roadway curve in ft?

A)5729.7 ft
B)619.41 ft
C)309.71 ft
D)None of the above

Question 10

For a given traverse, the sum of latitudes was found to be 1.89 and the departures of the sides were calculated to be -1.17. What is the closing error of the given traverse?

A)1.491 ft
B)2.223 ft
C)3.060 ft
D)None of the above

Question 11

What is the elevation of the point of vertical tangency for an equal-tangent sag vertical curve with the following given information?
G<
Sub>
1<
/sub>
= -4%, G<
Sub>
2<
/sub>
= +2%, L= 400ft, PVCSta = 100+00, PVCElev = 100.00 ft

A)96 ft
B)104 ft
C)128 ft
D)None of the above

Question 12

What is the length of the arc for the given curve?
Radius 270.00
Tangent in N 15°15' E
Tangent out N 20°15' E

A)2.354 ft
B)23.54 ft
C)235.40 ft
D)None of the above

Question 13

What is the maximum elevation difference accuracy standard required by National Geodetic Survey (NGS) for first order, class I geodetic leveling?

A)0.5
B)1.0
C)2.0
D)None of the above

Question 14

Why is a correction factor applied to roadway earthwork volume calculations when the alignment includes a horizontal curve?

A)To account for soil shrinkage or swell
B)To account for the eccentricity of the curved area
C)Answers A and B
D)None of the above

Question 15

Of the following, which is the approximate optimal length for a transitional spiral curve when using a 2,500 ft circular curve and a design speed of 65 mph?

A)50 ft
B)100 ft
C)175 ft
D)200 ft