11.
The maximum length of site to observe first- and second-order, three-wire leveling
is__________________________________________________________________________________.
A.
75 feet
B.
75 meters
C.
150 yards
D.
150 meters
12.
Balancing the lengths of backsights and foresights is very desirable in leveling because it
eliminates errors due to________________________________________________________________.
A.
Parallax
B.
Reading the rod incorrectly
C.
D.
Imperfect level adjustment
EN0593
4-36
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