14.
Safety precautions must be observed, especially when pruning trees.
Which one of the following is an unsafe practice?
a.
Halting of traffic during actual trimming
b.
Use of a tree trimmer aloft
c.
Use of an axe aloft
d.
Use of saw aloft
15.
In block and tackle operations, at approximately 70 percent of the
load, a failure warning is indicated when the
a.
rope twists.
c.
snatch block jams.
b.
rope snaps.
d.
hook starts to open.
16.
Certain safety precautions must be
observed when handling service
wires or working near power systems.
One important safety precaution
is to
a.
assume that light circuits are energized even though the lights
are off.
b.
assume that guy wires are safe when equipped with insulators.
c.
treat insulated foreign wires as insulated wires.
d.
string telephone wires above power lines.
17.
Maximum protection must be provided for construction crews when
working in busy traffic areas.
What is the recommended distance for
initial warning signs and the spacing of traffic cones when the local
speed limit is 45 miles per hour?
a.
45-50 feet:
45 feet
b.
150-250 feet:
45 feet
c.
250-350 feet:
45 feet
d.
250-350 feet:
50 feet
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