PRACTICE EXERCISE (Continued)
3.
What type of lubricant grease should be applied to O-ring seals when purging NVGs
AN/PVS-5A equipped with MX-9648/UV image intensifier?
a.
Krytox 240A2.
b.
Fluorinated grease.
c.
DC 33.
d.
L0 3 lubricant.
4.
The purge device is being used to purge and fill the NVGs AN/PVS-5A.
Purge
monocular by pumping vacuum handle until purge device gauge indicates what?
a.
3 1 PSI.
b.
Less than 20 inches/Hg.
c.
Greater than 20 inches/Hg.
d.
5 1 PSI.
5.
The purge and fill operation on the NVGs AN/PVS-5A is complete. Before breaking
down purge station, what position should the purge device switches be in?
a.
TEST LEAK/NITROGEN.
b.
PUMP/PURGE.
c.
LEAK TEST/PUMP.
d.
PURGE/NITROGEN.
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