11.
Approaches to noticeable changes in ground contour will require
grading the line. Failure to accomplish this properly may result in
a.
diminished downward or upward drag on the tie wires.
b.
extreme downward or upward tugging on the tie wires.
c.
diminished downward or extreme upward drag on the tie wires.
d.
extreme downward or diminished upward tugging on the tie wires.
12.
The recommended maximum allowable change in grade is 30 percent.
Line
poles set by a construction crew exceed this figure and
a.
ease vertical strain on the crossarms.
b.
place excessive strain on the pole guy wires.
c.
ease excessive strain on the pole guy wires.
d.
place extreme vertical stress on the crossarms.
13.
In pole line construction with a change in grade, a crew uses two-
point bracing for the aerial wire, and this is classed as
a.
light construction.
c.
normal construction.
b.
heavy construction.
d.
extra heavy construction.
14.
Guy wires and braces are used to give added support to poles subjected
to stress other than that originated in supporting open wires and
cables. When the pole line changes in direction,
a.
a pull is established.
b.
no corner pole is required.
c.
an open wire load is indicated.
d.
the guy wire size is established.
10
Previous Page
