2-17.
Which of the following considera-
2-18.
2-19.
2-20.
2-21.
tions must be made when selecting
stations for triangulation?
1.
Ease of signal erection
2.
Size of the angles to be turned
3.
Transit time between instrument
setups
4.
Direction of the sightings
After the stations have been
selected and you begin to erect
the towers, what must you consider
regarding the targets?
1.
How to light
2.
The size
3.
Color contrast of the target
and background
4.
Both 2 and 3 above
When you are using a 1-minute
h o w
m a n y
t i m e s
m u st
the angles be repeated to obtain
third-order precision?
1.
20
2.
12
3.
3
4.
6
To compute the coordinates of
triangulation stations, you must
have what data?
1.
Latitude and departure of the
point of origin
2.
The true meridian and azimuths
for all lines
3.
Latitude and departure of the
lines between the stations
4.
All of the above
You have measured a few tape
intervals in a base line and the
tape doesn’t quite reach the metal
strip on the buck. The head
chainman measures the distance the
chain must be set (a) in what
direction? He then records this
information in the field book and
(b) takes what action concerning
the measurement?
1. (a) Forward
(b) adds the measurement
to the tape length
2. (a) Forward
(b) subtracts the measurement
from the tape length
3. (a) Back
(b) adds the measurement to
the tape length
4. (a) Back
(b) subtracts the measurement
from the tape length
2-22.
2-23.
Figure adjustment uses what data
for adjustment?
1.
The sum of the exterior angles
2.
The sum of the interior angles
3.
The Pythagorean theory
4.
The 360° theory
When adjusting a chain of
triangles, what type of adjustment
should you perform first?
1.
Figure
2.
Station
3.
Side
4.
Log-sine
Figure 2B
IN ANSWERING QUESTIONS 2-24 THROUGH 2-28,
USE THE QUADRILATERAL AND ANGLE VALUES
SHOWN IN FIGURE 2B.
2-24.
After point A is adjusted by the
station adjustment method, what
is the corrected value angle 1?
1.
30°59'07"
2.
30°59'05"
3.
30°57'08"
4.
30°57'07"
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