11-42.
11-43.
If third order accuracy is
specified,
what is the maximum
allowable error of closure for a
level loop that is 7,826 feet
long?
1.
0.042 ft
2.
0.061 ft
3.
0.608 ft
4.
4.423 ft
Recording a rod reading in the
wrong column in a field book is
classified as a
1.
mistake
2.
standard error
3.
personal error
4.
natural error
IN ANSWERING QUESTIONS 11-44 THROUGH
11-48, SELECT FROM THE FOLLOWING LIST THE
CORRECTIVE MEASURE THAT YOU SHOULD TAKE
DURING A LEVELING OPERATION TO AVOID
ERRORS RESULTING FROM THE SITUATION GIVEN.
11-44.
Level not in adjustment.
1. A
2. B
3. C
4. D
11-45.
Unstable TP.
1. A
2. B
3. C
4. D
11-46.
Wear and tear evident on the
11-47.
11-48.
11-49.
11-50.
bottom of the rod.
1. A
2. B
3. C
4. D
Earth’s curvature.
1. A
2. B
3. C
4. D
Atmospheric refraction.
1. A
2. B
3. C
4. D
Between errors and mistakes, the
most importance difference, if
any, is that
1.
errors can be avoided
2.
errors are caused by human
negligence
3.
mistakes can be avoided
4.
there is no difference; the
terms are synonymous
In third-order leveling, the
starting and closing BMs must be
of
of
1.
2.
3.
4.
which of the following orders
accuracy?
First
Second or higher
Third or higher
Fourth or higher
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