LESSON 4
PRACTICE EXERCISE
(PERFORMANCE-ORIENTED/TEST VERSION 2)
LO4:
Purge Driver's Night Vision Viewer AN/VVS-2(V) l
TASK:
Purge Driver's Night Vision Viewer AN/VVS-2(V)1.
CONDITIONS:
Given Lesson 1 material, pencil, paper, TM extracts without supervision.
STANDARDS:
Demonstrates competency of the task skills and knowledge by correctly
responding to 80 percent of the multiple-choice test questions covering the
purging of the driver's night vision viewer AN/VVS-2(V)1.
INSTRUCTIONS:
In each of the following questions, select the one answer which BEST completes the statement or
answers the question. Indicate your response by circling the correct letter below.
1.
You are using the fire control tool kit and nitrogen tank to purge the driver's night vision
viewer AN/VVS-2(V)1. In order to perform the purge operation, which special tools are
required?
a.
Purge device.
b.
Regulator, pressure.
c.
Purging and pressurizing setup.
d.
Purging wrench/adapter assembly.
2.
When purging the driver's night vision viewer with the purge device, you observe the
purge device gauge to indicate 27 inches of Hg. What should you do next?
a.
Stop purging procedure and torque housing screws at 3 to 4 inches/pounds.
b.
Set purge device LEAK TEST/PURGE switch to LEAK TEST.
c.
Loosen the gas outlet ports and allow nitrogen to flow for 5 minutes.
d.
Set purge device PUMP/NITROGEN switch to NITROGEN.
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