PRACTICE EXERCISE (Continued)
While performing an operational check on the purge device, you observe that you cannot
pull a vacuum with the pump. What would be the corrective action you should take?
Replace vacuum hose set.
Replace vacuum pump.
Replace device housing.
Purging of the night vision goggle AN/PVS-7B is required under all of the following
When optics become fogged or misted.
When battery hatch seal and knob kit is replaced.
Anytime the unit is opened beyond a seal or O-ring.
Replacement of the eyepiece assembly.
While performing the purge and fill procedures, you observe that you cannot get a steady
reading of greater than 20 inches of Hg. What action should you take?
Replace purge device.
Replace purge adapter.