Figure 11B
IN ANSWERING QUESTION 11-18, REFER TO
FIGURE 11B.
11-18.
What is the target reading?
1.
8.128 ft
2.
9.120 ft
3.
9.128 ft
4.
279.0 ft
11-19.
In leveling, which of the
following statements best defines
height of instrument (HI)?
1.
2.
3.
4.
The elevation of the
horizontal line of sight
The vertical distance from the
horizontal axis of the
telescope to a point on the
ground directly below the
instrument
The vertical distance between
the reference datum and the
horizontal line of sight
The elevation of the reference
datum minus the backsight rod
reading
11-20.
In determining the elevation of an
unknown point, what arithmetic
operation should you apply to the
HI and FS?
1.
Addition
2.
Subtraction
3.
Multiplication
4.
Division
11-21.
By using the technique of
balancing shots, you can eliminate
which of the following effect(s)
in differential leveling?
1.
Instrumental error
2.
Curvature of the earth’s
surface
3.
Atmospheric refraction
4.
All of the above
11-22.
When turning points are being set
up in ordinary precision leveling,
what should be the maximum
distance between the instrument
and a TP?
1.
200 ft
2.
300 ft
3.
600 ft
4.
1,000 ft
11-23.
When turning points are located in
sandy soil, you must set the level
rod on a base.
Which of the
following bases is an acceptable
choice?
1.
A turning point plate
2.
A turning point pin driven
into the soil
3.
A marlin spike driven into the
soil
4.
Each of the above
11-24.
The original level run is rapidly
rerun as a check in what type of
leveling procedure?
1.
Three-wire
2.
Cross-section
3.
Profile
4.
Flying
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