LESSON 2
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.
Established points in geodetic surveys are referenced to as______________________________.
A.
Benchmarks
B.
The curved surface of a spheroid
C.
A plane surface
D.
Grid squares
2.
Each survey has a fundamental classification of control points called______________________.
A.
Class
B.
Datum
C.
Order
D.
Network
3.
To begin work on a net of triangulation, the ___________________ is required.
A.
Length of the starting line
B.
Azimuth of the baseline
C.
Astronomic coordinates of one end of the baseline
D.
Latitude and longitude of one end of the baseline
4.
In first-order triangulation, Class I, the most accurate or most precise length of closure requires a
ratio of 1 part in ______________________________________________________________________.
A.
150,000
B.
100,000
C.
50,000
D.
25,000
5.
In Class I, first-order triangulation, the observation of station is normally performed
___________________________________________________________________________________.
A.
At night, using signal lights as targets
B.
At night, using the heliotrope or wooden targets as observation points
C.
At night, but may be performed in daylight using the heliotrope or signal lights as targets
D.
In daylight, using standard cloth or wooden targets
EN0593
2-48
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