LESSON 1
PRACTICE EXERCISE
The following items will test your grasp of the material covered in this lesson. There is only one correct
answer for each item. When you complete the exercise, check your answer with the answer key that
follows. If you answer any item incorrectly, study again that part which contains the portion involved.
1.
In geodesy, the earth is defined, for mathematical purposes, as a(n)
A.
Oblate spheroid
B.
Spherical geoid
C.
Sphere
D.
Ellipsoid of revolution
2.
Points on the ellipsoid are defined in terms of ________________________________.
A.
Astronomic latitudes and longitudes
B.
Gravity determination
C.
Latitude and longitude
D.
Astronomic azimuths
3.
The gravity potential on the geoid is ________________________________________________.
A.
Perpendicular to the ellipsoid of revolution
B.
The same everywhere
C.
Parallel to the semiminor axis
D.
Equal to the centripetal force of the earth's rotation
4.
The angle formed when the ellipsoid and geoid intersect is equal to the ____________________.
A.
Normal to the ellipsoid
B.
Deflection of the vertical
C.
Normal to the geoid
D.
Geoid separation
5.
In geodetic surveying, the techniques used to determine precise points on the earth's
surface
are
horizontal
control
techniques,
vertical
control
techniques,
and
___________________________________________________________________________________.
A.
Gravity surveys
B.
Astronomic observations
C.
The geodetic azimuth determination
D.
The determination of the deflection of the vertical
EN0593
1-42
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