PRACTICE EXERCISE (Continued)
You are performing the operational and troubleshooting procedure on the purge device.
You observe that when the PUMP/NITROGEN switch is set to NITROGEN, nitrogen cannot be
felt or heard escaping from purge device valve. What is the corrective action?
Replace vacuum hose set.
Tighten all connections.
Check nitrogen supply.
Replace device housing.
A potentially dangerous situation could erupt with respect to equipment and personnel
injury if the night vision goggle AN/PVS-7A is pressurized beyond how many PSI?
It is not recommended that the tool kit, fire control be used to purge the night vision
goggle AN/PVS-7A without the purge device because--
the AN/PVS-7A does not provide for nitrogen flow-through.
the AN/PVS-7A wire body assembly has plastic construction.
The purge kit cannot accurately regulate pressure at 3 PSI.
The purge kit cannot draw a vacuum on the NVG AN/PVS-7A.