問題一覧
1
What’re the two categories for NVG?
Fast jet- incorporates an auto detach facility, making the NVG disconnect on ejection Non fast jet- no auto detach
2
Describe the ANVIS Mk1A
Auto detach Batteries housed on the helmet mount
3
Describe the ANVIS 9
Battery pack on the rear Reserved for special forces
4
Describe the FEN NG 700
Used on rotary wing and transport/ non operational No auto detach
5
Describe the FEN NG 2000/2001
Another variation of the 700, although this model has fixed objective lenses
6
What is this?
FEN NG 700
7
What is this?
FEN NG 2000
8
What is this?
FEN NG 700D
9
What is this?
ANVIS 9
10
What is this?
Nite-Op NVG
11
What is this?
Night Bird NVG
12
What is this?
Night vision mini monocular
13
Describe the Nite-Op NVG
Designed for in-use rotary aircraft Improved field of view Heavy 750g Counter balance attached to the rear
14
Describe the Night Bird NVG?
Developed from the night op goggle Auto detach facility heaviest Fast jet
15
Describe the Night Vison Mini Monocular?
Contained in a single man survival pack
16
What series are NVG?
112G
17
How’re NVG powered?
2x 3.6 volt Lithium Thynol Chloride batteries
18
How long does a NVG battery have a shelf life ?
12 months
19
How long should an NVG be powered for?
5 hours
20
When new batteries have a small amount of oil on them. What should you do?
Clean the terminals with a small amount of Isopropyl alcohol on a lint free cloth
21
Can NVG’s be stored with batteries fitted?
No
22
What can happen if NVG’s and batteries aren’t stored correctly?
Risk of the electrolytes leaking and the electrode materials reacting with with moisture. This could cause an explosion and the material could ignite.
23
How should NVG batteries be stored?
In a dedicated, clearly marked locker Cool dry well ventilated area Not exceeding 70*C preferably below 30*C Store only the minimum requirement Batteries in original packaging Hazardous items on separate shelves
24
What should you do if you get the contents of a lithium battery in your eye?
irrigate thoroughly for 15 mins
25
What is the main part of NVG?
Image intensifier tube (IIT)
26
What hazardous substances do the IIT contain?
Lead Phosphorus Beryllium Nickel Chromium Copper Silver Arsenic Trioxide
27
What should happen if a IIT is damaged?
Double wrapped and disposed through local toxic waste procedures. Detail contents and hazards should be clearly marked on a label
28
What lighting should be avoided when maintaining NVG’s?
Photographic rooms as red saturates the IIT
29
Name the different adjustments you can make to an NVG?
Vertical adjustment - Correct eye level Fore and aft control - Distance from eye Inter pupillary distance - distance between eyes Tilt control - tilt the NVG
30
List the availble light to an NVG?
Moonlight Starlight Cultral light
31
Will NVG work in total darkness?
No
32
What is the first lens called on an NVG?
Objective lens
33
What part of the IIT is collected light image converted into an electron image?
Photo Cathode
34
What part of the IIT are electrons accelerated down as they collide multiplying there numbers ?
Micro channel plate
35
What part of the IIT prevents the increased electrons returning back through the micro channel plate causing a blockage?
Ion barrier
36
What do you call the part of the IIT that allows electrons through creating an image for the user?
Phosphor screen
37
What do you call the part of the IIT that allows the image to be passed through and it corrects the orientation of the image ?
Fibre optic image converter
38
How owns Pinnacle IIT
US government
39
What is the DAP for NVG ?
DAP112G-1622-2(NAR)1
40
What’re the different levels of maintenance on a NVG?
First level (forward) Second level (forward) Fourth level (Depth) Scheduled maintenance
41
If an NvG has been in storage for 12 months what should it be subject too?
Standard serviceability test (SST)
42
If a fourth level NVG returns what should you do?
SST
43
NVG’s have their own engineering record card, what is it?
F735 NVG
44
If maintaining NVG’s how often should you get your eyes checked?
every 2 years
45
What requirement must be met when maintaining NVG?
Correctable 6/6 (20/20) vision
46
What should you find on an F735 NVG record card?
Serial number Next due maintenance IIT serial number Details of maintenance and repairs Mod/sti/rti state Details of unit transfers
47
Describe the ANV-20/20 Test set?
Compact, portable system designed to provide accurate means of performing infinity focus and mechanical alignment on night vision goggles
48
Describe the ANV 126A test set?
Perfoms a full range of critical tests on NVG’s it enables: resolution gain distortion spot defects
49
The resolution pattern is directly correlated to the?
Snellen chart range of 20/70 to 20/20
50
After how long will the ANV 20/20 turn off?
3 mins
51
Ocular assemblies must be purged but what with ?
while spot nitrogen. also known as a walk around
52
What test can you do to check for phosphor utilized in the IIT?
Hoffman 420 and the two types are P20 & P43
53
What does the ANV 20/20 test set do?
check inter pupillary distance enable adjustment of goggles mount for tilt and eye relief allow each eyepiece and objective lens assembly to be adjusted for focus
54
What is a blemish defined as?
an opaque dark or white spot with a constant greater than 30% to the immediately surrounding are.
55
Describe chicken wire?
irregular pattern of dark thin lines in the field of view
56
What is shading?
shading appears as a dark area along the edge of the image
57
What is edge glow?
Edge glow appears as a bright area along the outer edge of the image
58
How long does it take for an NVG to warm up?
30 seconds