6-61.
You have a planimeter but do not
know the constant for the
instrument. How may you determine
an area with this instrument?
1.
By measuring the drum
2.
By measuring a known area of
the same scale and
establishing a ratio
3.
By measuring the area you want
to know and calculate using
the drawing scale
6-62.
Once you have determined the
segmental areas, what do you do
with this information to find the
area of the whole parcel?
1.
Always subtract the areas from
the area of the parcel
2.
Always add the areas to the
area of the parcel
3.
Determine if the segmental
areas are inside or outside
the parcel straight-line and
chord boundaries, then add or
subtract as required
Learning Objective: Recognize
correct procedures for plotting
angles by the protractor-and-scale
method, tangents, and coordinates.
A.
Protractor
B.
Tangent
C.
Coordinates
Figure 6G
IN ANSWERING QUESTIONS 6-63 THROUGH 6-66,
SELECT FROM FIGURE 6G THE METHOD OF
PLOTTING TRAVERSES THAT IS BEST DEFINED
BY THE QUESTIONS. SOME RESPONSES MAY BE
USED MORE THAN ONCE.
6-63.
This method uses a NS meridian to
lay out each angle.
1. A
2. B
3. C
6-64.
This method uses linear distances
from reference lines, locates
points, and then connects them with
lines.
1. A
2. B
3. C
6-65.
This method uses deflection angles
and a reference meridian.
1. A
2. B
3. C
6-66.
This method uses a single meridian
to lay out each bearing line. Then
you use parallel lines to transfer
these directions to the plot.
1. A
2. B
3. C
Learning Objective: Identify
surveying computation mistakes,
their causes, and methods to
correct them. Also, identify ways
to prevent future mistakes.
6-67.
A bearing that has the correct
angular value, but the wrong
compass direction is usually caused
by which of the following surveying
mistakes?
1.
Viewing the direction of a
traverse line from the wrong
station
2.
Dropping a traverse line
3.
Taking a reading from a wrong
column of a traverse table
4.
Omitting the plus or minus sign
of a written value
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