LESSON 1
PRACTICE EXERCISE
ANSWER KEY AND FEEDBACK
Item
Correct Answer and Feedback
1.
D
Ellipsoid of revolution.
The shape of the earth is more precisely represented mathematically by an...
(page 1-2, para 1-2)
2.
C
Latitude and longitude
Points on the ellipsoid can be defined... (page 1-4, para 1-2c)
3.
B
The same everywhere
First, the gravity potential in... (page 1-6, para 1-3b)
4.
B
Deflection of the vertical
This angle is called the... (page 1-6, para 1-3c)
5.
B
Astronomic observations
The techniques used to do this... (page 1-8, para 1-4)
6.
D
Astronomic longitude and azimuth are measured
Places at which astronomic longitude... (page 1-9, para 1-5b)
7.
D
Geoid
Therefore, an astronomic observation... (page 1-10, para 1-5c)
8.
C
Rotation of the earth
The variation of the earth's... (page 1-18, para 1-7g)
9.
C
Force of the earth's attraction due to gravitation, minus the centrifugal force due
to rotation of the earth
The theoretical value of gravity... (page 1-20, para 1-7j)
10.
B
Absolute acceleration of gravity
The absolute acceleration of gravity... (page 1-22, para 1-7o)
11.
C
Gravimetric data
Use the following five conditions... (page 1-24, para 1-9a[1])
12.
D
The perpendicular to the ellipsoid and the plumb line coincide
In this method, it is assumed that... (page 1-25, para 1-9b[1])
EN0593
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