6.
Construction of a branch pole line to a new training area located
about 1-1/2 miles from the present transmission line is planned for
next month.
The project engineer has completed preliminary
preparations and the layout crew has completed staking out the line
for 4-pair open wire construction, using 150-foot spans. A machine is
available to dig the holes for 58 poles and 24 anchors. Round wooden
30-foot poles will be used and guying will be accomplished using logs
and 2.2M wire messenger.
One crew is available to distribute the
material, dig holes for the poles and anchors, assemble the eight-pin
wood crossarms, set and guy the poles, and install the line wire.
Using table 3-I, how many manhours will it take for the construction
crew to complete the work?
a.
353.8 manhours
c.
425.8 manhours
b.
416.8 manhours
d.
449.8 manhours
7.
Using the same situation as in exercise 6, substitute lightweight
metal poles and crossarms and install 50-pair lead-covered cable on 6M
wire messenger in lieu of the 4-pair open wire system. Using table 3-
I, how many manhours will now be required for the construction crew to
complete the work? (NOTE: A reel has 1/2 mile of 50-pair lead-covered
cable.)
a.
406.9 manhours
c.
464.5 manhours
b.
447.1 manhours
d.
488.3 manhours
8.
Depending on the type of construction used, specific functions must be
accomplished in a definite sequence. The sequence for specific tasks
performed in aerial cable construction is to dig pole holes and place
anchors,
a.
set and guy poles, splice cable, and install cable on messenger.
b.
equip, set, and brace poles, place suspension strand, and splice
cable.
c.
set poles, install cable on messenger, place suspension strand,
and establish test points.
d.
equip, set, and guy poles, place messenger cable, install cable
on messenger, and splice cable.
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