問題一覧
1
What’re lightweight headsets used for?
Air communications used in areas of moderate ambient noise
2
Do communication headsets require the use of a helmet?
No
3
What should communication headsets provide the wearer with?
Communications - to crew members, air traffic and Mission Control Noise attenuation (hearing protection) Oxygen mask attachment
4
What’re the 3 stated noise levels?
Low Moderate High
5
What is this?
Atlantic series
6
What is this?
Airlite 91
7
How do you choose between different types of headset models?
Depending on the ambient noise present
8
List the components of a Atlantic headset?
Ear shells Circuit board Transducer (earphone) Head band Neck strap Boom arm and microphone Main cable and switch
9
What side of the headset is the circuit board and main cable attached to?
RH shell
10
What protects the user from shock whilst wearing a headset?
Chloroprene cap on the transducer (earphone)
11
What’re the 3 different lengths the cable for headsets come in?
950mm 1400mm 2800mm
12
How many variants does the Atlantic headset come in?
3
13
What is a passive headset?
A headset with foam dampers inside the shell. used to protect against moderate ambient noise (transport)
14
What is a Improved passive headset
A headset that has improved noise dampers and protects against 80Dba
15
What is Active noise reduction headset (ANR)
A headset fitted with a ANR switch that cancels out ambient noise electronically. Used for high ambient noise.
16
What is the support policy document for communication headsets?
AP116Z-0400-2(R)1
17
Where do you find general information on headsets?
DAP108B-0001-1
18
Protective helmets in the RAF must have what qualities?
Protection in the event of crash landing Communication facility Noise attenuation A method of oxygen mask attachment Eye protection NVG mounting platform
19
What’re the aircrew protective helmets made out of and what is there purpose?
Frangible fiberglass or composite material shell, which breaks up on impact, dissipating some of the energy
20
What is this?
Mk4A/4
21
Describe the Mk4A/4 protective helmet
Used on fast jet ejection seat aircraft, also used on fixed wing static seat and used on rotary. NVG compatible The inner visor can be locked down in position by a spring loaded locking device, while the outer visor can be independently positioned but not locked.
22
Describe the Mk10 Series
Designed to provide high level of protection against impact shock, air blast , ambient noise and is compatible with a wide range of oxygen masks and clothing. Has a double visor system Pre drilled holes for fitting of boom microphone.
23
Describe the Mk4B/4L Protective helmet
Used on fixed wing static seat and rotary. Designed for high levels of impact shock, blast and noise and is compatible with a wide range of oxygen masks and clothing. Lo Pro system NVG compatible
24
What is this?
Mk4B/4L
25
What is this?
Mk10 C
26
What is this?
Mk10 R
27
What is this?
Mk10 RW
28
What is new about the Mk10 R and Mk 10RW series helmets?
New impact liner fabricated from expanded polystyrene.
29
What is this?
Mk10 SAR
30
Describe the Mk10 SAR
Helmet is for search and rescue use and for off aircraft use only. Designed to provide a high level of protection against water immersion, impact shock and ambient noise and are compatible with a wide range of clothing. Double visor system Helmet is fitted with a headset and boom microphone fully waterproof (to 1 meter) EAV when activated enables the helmet wearer to converse with overs.
31
What is this?
Ipache IHADSS
32
What is this?
Typhoon HEA
33
What is this?
Mk15 Helmet
34
What helmet is Omni fit(single size)
Mk15
35
What helmet is fitted with compression molded resin?
Mk15
36
What is the lining of the Mk15 manufactured from?
closed cell polyurethane foam, which recovers its shape after compression.
37
Where do you find instructions for donning the Mk15 helmet?
fitting instructions are illustrated on the helmet stowage bag
38
What do you check the mic and comms on during ALFDS ?
EDL test set type 2835
39
What might be a reason to do out of phase maintenance?
this could be due to aircraft flying away from their parent unit
40
What is the difference between the Mk10 and Mk11 helmets ?
They have the same design, however the mk11 has a revised outer shell sizing, resulting in a different sized visor and liner.
41
What does the Marine safety helmet (MSH) provide ?
head protection during wet drill training training including winching SE personal employed on survival drill training, aboard safety boats or on equipment recovery duties.
42
What is this?
mk10 marine safety helmet
43
What is this?
mk11 marine safety helmet
44
What’re the 3 main components of the marine safety helmets?
outer shell inflatable liner visor system
45
What is the shell of the marine safety helmet made out of?
Kevlar fibreglass construction and is fluted in to order increase in strength and rigidity.
46
The lining on the marine safety helmet has an inflatable liner, how does it work?
it can be inflated or deflated as per the users head size. this is achieved by the wearer blowing through a oral valve held close to the mouth by the chin strap.
47
What are the additional benefits of the lining in the marine safety helmet?
increased comfort buoyancy heat retention
48
How many days after a marine safety helmet had been rinsed if it’s been immersed should you inspect and wash again?
14 days
49
What is the life of a marine safety helmet once removed from manufacturers packaging?
5 years
50
Where is general information found on AEA?
AP108F-0001-1
51
What is the Typhhon helmet DAP?
DAP101B-5400-1A
52
What is the DAP for passenger helmet Mk15 ?
DAP108F-0216-123
53
What is the DAP for general and technical information covering wet drill equipment (marine safety helmet)?
DAP108A-0202-12
54
What authorized details can be marked on dump tape on the helmet?
Rank and name date of next maintenance unit locker or maintenance number
55
What does FPV stand for?
Face Protection visor
56
How should you clean the polycarbonate area of a FPV?
remove dust using an air duster (kenair) wash in a solution of 10% general purpose liquid detergent (arrow) and Luke warm water using a lens cloth. rinse the visor with clean water and dry with an air duster. DO NOT DRY WITH A CLOTH.
57
How should you clean a visor if it’s got signs of clouding (milky appearance)?
isopropyl alcohol and a lint free cloth. dry the visor with a air duster. DO NOT DRY WITH A CLOTH.
58
What’re the two main types of ear protection devices?
ANR CEP
59
Describe ANR
The ANR system attenuates the noise field to acceptable levels at critical frequencies. ANR is integrated in the communication helmet
60
What is CEP
CEP is an in ear device
61
What sizes does the Mk4A/4L come in?
small medium medium long medium broad Large
62
What does an EDL type 2835 test for ?
an open circuit low insulation resistance microphone sensitivity earphones work effectiveness of the screening to the headset
63
When is a compressive headset tester used?
used on scheduled maintenance or if a fault can not be identified on a EDL 2835.
64
What does a comprehensive headset tester test?
sensitivity distortion phase crosstalk
65
What is this?
Throat microphone
66
What does a throat microphone do?
intended for extremely high ambient noise (above 120Db) takes sound waves from the larynx. reduces the effect of ambient noise
67
What are the negatives of a throat microphone?
Quality of speech is reduced as the microphone does not receive sounds formed by lips or the tongue.
68
What is the the throat microphone made up of?
microphone unit (usually double) neck strap cable terminating plug, plug will determine type or mark of microphone
69
What’re lightweight headsets used for?
Air communications used in areas of moderate ambient noise