問題一覧
1
Fastener
describe all the various types of fastening device employed in the construction of an aeroplane
2
Flexible lines must be fitted with a slack of
5-8% of the length
3
Brass springs has good electrical conductivity
but is unsuitable for high-stress applications
4
The larger diameter on a bevel gear is called the
heel
5
the aluminum will have
a lower VPN than the steel
6
A small amount of shaft misalignment can be tolerated by using
toroidal roller bearing type.
7
Iron oxide is sometimes added to aircraft dope to improve it's
durability to adhesion
8
The brinell hardness testers uses
a steel ball indenter
9
A fibre made
of glass
10
Retarder is used to slow the drying time of dope finishes to prevent
blush
11
Custom shaped compression springs include
conical, hourglass or barrel shaped
12
The strength of the material
is the most important factor that can affect a choice of material for using in springs
13
proposed repair scheme should meet all the original design requirements
for the structure
14
What is the purpose of screening on a coaxial cable?
To prevent EMF radiating out from the Core cable and prevent induced EMF into the core
15
When two gears are running together the smaller one is called a
pinion
16
The removable half which mates with the receptacle and is usually
at the end of a cable/lead
17
Impact resistance
is the ability of a material to withstand impact without shattering
18
Metals which contain iron is
ferrous metals
19
If a spring has ‘closed ends’ the first and last coils have
zero pitch
20
Washers have one or more tabs projecting from the external diameter; they may also be ganged for locking two or more nuts ,known as
Tab washers
21
Duralumin
2000 series of aluminum alloy
22
Case hardening is
heat-treating process of metal produces a hard, wear-resistant surface over a strong, tough core
23
What type of insulation cannot be stripped with thermal strippers?
PTFE
24
The female threads are subjected mainly to
compression force
25
The total storage / shelf life of hydraulic return lines and instrument hoses is
10 years
26
Replacement tubing should be of the same size and material as
the original line
27
An interconnect cable has what insulation?
Thinner than airframe cable
28
The 6000 series of aluminum alloy principle alloying element of
magnesium and silicon
29
The TNC (threaded nut coupling) series connector is a threaded version of the BNC and operates to the same specification as the
BNC connector
30
Needle bearings resist
radial load only
31
Hoses for highly pressure applications are made from
synthetic rubber liner
32
Corrosion will spread more rapidly when metals are exposed to
high temperatures
33
The total storage / shelf life of fuel , oil and hydraulic pressure hoses from the cure date of manufacture is
10 years
34
Thermal conductivity
ability of a material to conduct a certain amount of heat within a given time, copper is a good example.
35
Heart shake defect of wood is indicated by a parting of the
annular rings
36
Flush head or countersunk rivets have an angle of
78-120 degrees countersink
37
Studs which have a size larger thread at one end are called
stepped studs
38
Spur gears
are the most common and cheapest type of gears
39
Dielectric loss in coaxial cable result from
heating the dielectric material (insulation)
40
Mechanical protection can be provided for the cable by routing the bundles through either
flexible or rigid conduit
41
‘A’ Glass
is a standard soda glass in common use for windows , etc
42
A type B self tapping screws is
blunt point
43
When speaking about "aircraft plumbing" it refers to the
tubing
44
Interconnect cables employ
thinner insulation than airframe types
45
Fabric repair seams on a fabric covered aeroplane should be
covered with tape
46
Spherical roller bearings
can accept a small amount of misalignment
47
Compared to other types of electrical connectors crimping does not have the advantage of
assembly without tools
48
A bowdenflex
cable is flexible only in one plane
49
The Charpy and Izod tests are types of
impact tests
50
There are commonly four types of cable strippers available which are:
❖ A rotary device which cuts around the cable ❖ A four-action device, which is a high precision cut and strip tool
51
Non-reversible chains are similar to standard chains except that each outer plate is extended in
one direction in order to break up the symmetry of the chain to prevent the chain from being assembled incorrectly
52
The vast majority of aircraft control cables are terminated with swaged terminals , that must be checked with
a go-no-go gauge before and after, to show compliance with the manufacturer's instructions after the swaging operation
53
Strength
is the name of the ability to support load without breaking
54
Leaf spring
is used on many Cessna aircraft landing gear
55
Tin plated copper maximum continuous temperature
135ºC
56
Pulleys are usually manufactured from
resin impregnated fibre materials
57
The usual method of repairing elongated bolts in a wooden structure is done by
fitting steel bushes
58
a thermosetting resin
once cured , it cannot be become liquid again by heating
59
The best type of wood to be used in the construction of aircraft is
Sitka Spruce
60
Aircraft bolts are usually
class 3 fit
61
The 2024-T and 5052-0 aluminum alloy materials are used for
hydraulic lines , Pneumatic lines and high pressure oil lines
62
Aircraft bolts are always manufactured in
class 3, medium fit
63
Corrosion at the grain boundaries is called
intergranular
64
Needle roller bearings are used
where space saving is an important factor
65
Locking wire is used only
once
66
TNC used in
a high vibration area
67
Pearlite is a laminate microstructure of steel consisting of
ferrite and cementite
68
Belt and pulley drives, Screw jacks and Chains
are the transmission forms that are typically used on aircraft
69
Use of crimped splices in
aircraft electrical cables
70
the fibres in composite can be wound tightly to increase
strength
71
High tension leads or high-tension cables or spark plug wires or spark plug cables are the wires that connect
a distributor, ignition coil, or magneto to each of the spark plugs in piston engines
72
Worm drives operated in shafts which are
non-parallel and non intersecting
73
Most aircraft control system pulleys are made from
Tufnol
74
Polyesters are two or three-part systems have good environmental resistance and heat resistance up
to150˚C
75
can be confirmed by
X-ray inspection
76
The ‘Nimonic’ series of alloys are
high temperature , corrosion resistance alloys
77
Spring hooks are subjected to
bending load
78
Epoxy resins advantage that they
do not react with the solvents and dopes used for fabric coverings
79
Lines containing physically dangerous materials, such as oxygen, nitrogen, or Freon, are marked
PHDAN
80
Hoses are used on instrument systems, vacuum systems, autopilots and other low pressure systems, usually operates at pressures below
250 psi
81
The lay line
is a legible marking parallel to the longitudinal axis of a hose and is used to determine the straightness of the hose
82
A laminate
is a simple structure built-up from layers of cloth impregnated with resin
83
Adding other elements to aluminum alloys , such as copper ,manganese or magnesium
decrease corrosion resistance of the aluminum
84
another name for Pneumatic springs is
gas dampeners
85
Linear expansion of a rotating shaft in a housing can be compensated for by using
roller bearings
86
Magnesium alloys
are not susceptible to intergranular corrosion
87
The tubing used is generally of the seamless type and is specified by
material
88
Aramid fibres
do not resist flame well and burn through more quickly than other fibres
89
When selecting wood suitable for aircraft structural use , the growth
rate should be more than 6 rings per inch(25 mm)
90
A rivet with a plain head is classified as
1100 (A)
91
Plasticity
is the opposite to elasticity
92
Grinding of a steel reveals a dull but spark pattern (lots of forking)
It is likely to be high carbon steel
93
Oxidation rate of a metal usually
increase with an increase in temperature
94
There are basically two types of thread inserts available. One is known as
thin wall insert
95
Restricted entry for the ring tongue terminals are
identified by a thin coloured band along the barrel insulator