PRACTICE EXERCISE (Continued)
Purging the viewer infrared AN/PAS-7A as directed in TM 11-5855-246-24&P. You
observe the low pressure gauge indicates a pressure of 1.5 pounds after 4 minutes. What
action should you take?
Adjust the regulator control until low pressure gauge indicates 3 pounds.
Allow the nitrogen gas to flow through the viewer for 5 minutes, then tighten the
The viewer leak rate is acceptable. Move to next step in the purge procedure.
Use a torque screwdriver and tighten all cover screws to a torque of 3 to 4
You are purging the AN/PAS-7A, IAW TM 11-5855-246-24&P, and begin to loosen the
seal screw and allow the nitrogen gas to escape until the low pressure gauge indicates
how many PSI?
3 + 1/4 PSI.
1 1/2 to 2 PSI.
3 to 4 PSI.
1/4 to 1 1/2 PSI.
The purge procedures as outlined in TM 11-5855-246-24&P were specifically designed
for use with which purge station?
Purging and pressure test setup.
Nitrogen purging equipment setup.
Fire control tool kit and nitrogen tank setup.
Nitrogen cylinder and regulator pressure setup.