2025/26 GRADED A+
What is the major advantage of dual-frequency over single-frequency GPS
receivers?
A. precise measurements of longer baselines
B. observation of more satellites
C. observation in bad weather conditions
D. measurement in three deminsions Answer - A. precise measurements of
longer baselines
Dual-frequency GPS receivers collect data that can be used to model the
ionospheric delay and thereby compensate for its effects on the signal.
Therefore, they may be used for baselines of greater length and also require
shorter observation times for comparable precision, as compares to single-
frequency receivers.
What method should be used to restore a lost southeast corner of Section 31 in
a typical township?
A. bearing-bearing intersection
B. single proportional measurement
C. double proportional measurement
D. record bearing and distance Answer - B. single proportional measurement
Since the southeast corner of Section 31 is on the township exterior, single
proportional measurement should be used to reestablish lost corners.
,The star Polaris is located in which constellation? Answer - . Ursa Minor
What is the length of one link of a Gunter chain? Answer - A Gunter's chain is
66ft in length and is divided into 100 links. Therefore, each link is 0.66ft or 7.92
in
When sighting through a leveled instrument at a distant level rod, curvature of
the earth would have what effect on the rod reading? Answer - The rod
reading would be greater due to the constant dropping of the Earth's surface
from the horizontal level line.
When sighting through a leveled instrument at a distant level rod, what would
be the effect of refraction on the rod reading? Answer - The rod reading would
be less because refraction has the opposite effect as curvature.
On a map developed from a Lambert projection, which of the following is true?
A. Meridians converge
B. Parallels are arcs of circles
C. Parallels are uniformly spaced
D. (A), (B), and (C) are true Answer - D. all of the above
On a lambert projection, meridians are sown as converging straight lines, while
parallels are shown as uniformly spaced arcs of circles.
Which method should be used to restore a lost southwest corner of Section 31
in a typical township?
A. bearing-bearing intersection
B. single proportional measurement
,C. double proportional measurement
D. record bearing and distance Answer - C. double proportional measurement
Since the Southwest corner of Section 31 is the township corner, double
proportional measurements should be used to reestablish the corner.
Which of the following can be accomplished by the DMD method?
A. Balancing a closed traverse
B. correcting latitude observation
C. correcting longitude observation
D. determining area of a closed figure. Answer - D. determining area of a
closed figure.
DMD stands for Double Meridian Distance and describes a method for
determining the area of a closed figure.
In a closed traverse with the only significant error in measurement being one
angular error, at which station was the error most likely made? Answer - The
perpendicular bisector of the line of closure will point the traverse station
where the error was probably made.
A closed traverse has a total length of 2181.14 ft. and an error of closure of
0.37 ft. in the northing and 0.24 ft. in the easting. What is the ratio of error for
the closure?
A. 1:4957
B. 1:5187
C. 1:6319
D. 1:9453 Answer - A. 1:4957
error of closure=SQRT(DeltaNorthing^2+DeltaEasting^2)
, Elevations provided for geodetic benchmarks are usually referenced to which
datum?
A. mean tide level
B. mean sea level
C. National Geodetic Vertical Datum
D. North American Datum of 1927 Answer - C. National Geodetic Vertical
Datum
What is the arc length of a highway curve with a radius of 954.93 ft, an interior
angle of 60degrees, and the following stationing?
PC 23+45.67
PI 28+97
PT 33_45.67 Answer - 1000ft
arc length= PT-PC
A grid distance in a state plane coordinate system is 5280.00ft and the scale
factor is 0.9999424. What is the surface distance, assuming no sea level
correction is necessary? Answer - 5280.30 ft.
Surface distance=grid distance/scale factor
A compound highway curve, with both curves having interior angles of 45
degrees, has an approach tangent of N45E. What is the bearing of the tangent
leaving the curve?
A N45E
B S45E