5.
In a three-wire, precise leveling operation always______________________________________.
A.
Read the instrument scale first
B.
Read the top hair first
C.
Read the middle hair first
D.
Read the bottom hair first
6.
The stadia constant is a numerical value calculated for each instrument. It is used
to_________________________________________________________________________________.
A.
Find the limits of the instrument's telescopic capability
B.
Find the amount of error inherent in the instrument
C.
Obtain the length of the sections being observed
D.
Determine if the precise level rods have any gross error and how much
7.
In determining the stadia constant, if any of the individual stadia constant computations (one at
each of the six stations) are not within the allowable limits of the mean of the six constants, the readings
must be taken again. What is the limit?
A.
2.0 from the mean
B.
0.2 from the mean
C.
0.02 from the mean
D.
0.002 from the mean
8.
The value given as the stadia constant of an instrument is entirely dependent on
the_________________________________________________________________________________.
A.
Power of the telescope
B.
Spacing of the crosshairs
C.
Type of precise rod used on the survey
D.
Type of reticle installed in the instrument
9.
If the deviation from the vertical in either direction on a precise level rod exceeds
___________________________ on a 3-meter length, adjust the rod level.
A.
4 millimeters
B.
8 millimeters
C.
10 millimeters
D.
12 millimeters
10.
In three-wire leveling, the half-thread (wire) intervals must agree within what
distance____________________________________________________________________________.
A.
0.002 inch
B.
0.003 meter
C.
0.02 meter
D.
0.03 meter
4-35
EN0593
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