4.
Every outside cable pair connects to a line protector assembly.
Each
protector assembly consists of a
a.
heat coil in series with the line, and a fuse in parallel across
the line.
b.
carbon block air gap in series with the line, and a fuse in
parallel across the line.
c.
heat coil in series with the line, and a carbon block air gap in
parallel from line to ground.
d.
carbon block air gap in series with the line, and a heat coil in
parallel from line to ground.
5.
Unused outside lines should be grounded to prevent development of
noise. Grounding is easily done by
a.
installing jumpers.
b.
removing heat coils.
c.
installing grounding clips.
d.
removing open-space cutouts.
6.
Routine maintenance procedures call for periodic cleaning of protector
blocks. A dirty air gap results in
a.
noise.
b.
open lines.
c.
inoperative heat coils.
d.
loss of lightning protection.
7.
Two methods used to attach
wire
to
terminal
blocks
on
main
distributing frame include
a.
Wrapping and bolting.
b.
bolting and clipping.
c.
clipping and soldering.
d.
soldering and wrapping.
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