Exam Type Questions (Class) Flashcards
When a metal is called Ferrous, it means that the metal contains?
a. Carbon
b. Iron
c. No Iron
b. Iron
What material is commonly used in the construction of aircraft firewalls?
a. Aluminium
b. High Carbon Steel
c. Stainless Steel
c. Stainless Steel
What type of steel is commonly used to manufacture spanners/wrenches?
a. Nickel-Chrome
b. Chrome-Vanadium
c. Chrome-Molybdenum
b. Chrome-Vanadium
What system is used in the classification of steels?
a. SAE (Society of Aircraft Engineers)
b. AA ( Association of America)
c. SAE (Society of Automotive Engineers)
c. SAE (Society of Automotive Engineers)
Steel containing between 0.3% & 0.5% carbon is ref. to as?
a. Low Carbon Steel
b. Medium Carbon Steel
c. High Carbon Steel
b. Medium Carbon Steel
Heat treatment process known as annealing is carried out on steel to?
a. Soften the material
b. Harden the material
c. Prepare the material for painting
a. Soften the material
The tip of a hardened steel chisel can have some of the hardness drawn out of it, to relieve stress and improve ductility by a process known as?
a. Normalising
b. Annealing
c. Tempering
c. Tempering
What is the raw material used in the production of aluminium?
a. Alumina
b. Bauxite
c. Beach sand
b. Bauxite
What is the primary disadvantage of pure aluminium as an aircraft structural materal?
a. Pure aluminium does not have the required strength for structural applications
b. Pure aluminium is too heavy
c. Pure aluminium is hard to machine
a. Pure aluminium does not have the required strength for structural applications
How can the strength of non-heat treatable aluminium alloys be increased?
a. By annealing
b. By strain hardening, or cold working
c. It is not possible to increase the strength of them
b. By strain hardening, or cold working
What’s the chief alloying element in 7075 aluminium alloy?
a. Zinc
b. Magnesium
c. Copper
a. Zinc
What type of material is used to clad an aluminium alloy?
a. Cadmium
b. Copper.
c. Pure Aluminium
c. Pure Aluminium
What the is the percentage of the material thickness that is cladded on an aluminium alloy component?
a. 1 - 3 %
b. 3 - 5 %
c. 5 - 7 %
b. 3 - 5 %
What’s the purpose of cladding aluminium alloys?
a. It is acid proof.
b. It acts as a surface protection against corrosion of the alloy underneath
c. it is decorative
b. It acts as a surface protection against corrosion of the alloy underneath
What do the letters SAE stand for?
a. Shannon Aerospace Engineering
b. Standard Aviation Engineering
c. Society of Automotive Engineers
c. Society of Automotive Engineers
In what condition is the alloy designated 2024 - T3?
a. Strain hardened only
b. Solution heat-treated and cold worked.
c. Solution heat treated and artificially aged
b. Solution heat-treated and cold worked.
Why refrigerate 2017 and 2024 aluminium alloy rivets after heat treatment?
a. To retard age hardening
b. To accelerate age hardening
c. To prevent work hardening
a. To retard age hardening
What is the temper designation of an aluminium alloy, which has been solution heat treated and artificially aged?
a. T3
b. T6
c T4
b. T6
Which of the groups below shows only non-heat treatable aluminium alloys?
a. 1100, 3003, 5052, 5056
b. 3003, 5056, 1100, 2117
c. 5052, 2024, 2017, 2117
a. 1100, 3003, 5052, 5056
When material is bent around a radius what happens to the material?
a. It is solution heat-treated
b. It is annealed
c. It is cold worked
c. It is cold worked
What temperature must 2024 aluminium alloy be solution heat treated at?
a. 395 + 5C
b. 495 + 5C
c. 515 + 5C
b. 495 + 5C
On a threaded component, which measurement is the ‘‘thread depth’’?
(a) The thread major diameter less the thread root.
(b) Thread crest to thread root
(c) The threaded length of the component
(b) Thread crest to thread root
On a threaded component ‘‘thread pitch’’ os described as: -
(a) The distance between the major diameter and the minor diameter
(b) The distance from the centre of one crest to the centre of the next
(c) The number of threads on a component
(b) The distance from the centre of one crest to the centre of the next
In a triple threaded screw, one revolution corresponds to:
(a) 1 Pitch’s
(b) 2 Pitch’s
(c) 3 Pitch’s
(c) 3 Pitch’s
While wire-locking the twists should be tight and even, applying no more than: -
(a) The highest limit in terms of twists when using .040’’ size wire
(b) 6 - 8 twists per inch
(c) 7 - 10 twists per inch
(c) 7 - 10 twists per inch
The advantage of a ‘‘P.L.I’’ washer is that: -
(a) Over torquing is impossible
(b) They are self-locking
(c) A bolt may be tightened to a pre-determined torque
(c) A bolt may be tightened to a pre-determined torque
Given the fastener part number NAS 6607-9D, how should it be safely secured?
(a) By lock wire
(b) By split pin
(c) By lock washer
(b) By split pin
D stands for drilled shank
Which of the following screws is not threaded over the full length?
(a) Machine Screws
(b) Structural Screws
(c) Self-tapping screws
(b) Structural Screws
How many bolt threads should appear above a self-locking nut?
(a) 1, 1/2
(b) 2, 1/2
(c) 3, 1/2
(b) 2, 1/2
The purpose of a self-aligning washer is to?
(a) To help align a nut and bolt
(b) To use on an inclined surface
(c) To align two or more parts together
(b) To use on an inclined surface
Nylon insert self-locking nuts should not be used in areas where the temperature exceeds:
(a) 90 degrees C
(b) 120 degrees C
(c) 110 degrees C
(b) 120 degrees C
Which aircraft screw had a blunt point to it:
(a) Type ‘‘A’’
(b) Type ‘‘B’’
(c) Type ‘‘C’’
(b) Type ‘‘B’’
What does a circle on the head of a bolt indicate
(a) Reworked bolt
(b) Close tolerance bolt
(c) Magnetically inspected
(a) Reworked bolt
Washers are used to: -
(a) Act as a bearing surface for the nut
(b) Keep the nut separated from the surface of the material
(c) Accomodate different diameter bolts in the same diameter hole
(a) Act as a bearing surface for the nut
What is the most common type of Boeing aircraft thread
(a) ISO Fine
(b) Unified Course
(c) Unified Fine
(c) Unified Fine
What is the diameter of the following bolt BACB30LK3-4?
(a) Diameter of 3/32
(b) Diameter of 3/16
(c) Diameter of 4/16
(b) Diameter of 3/16
Where is a Clevis bolt normally used:
(a) High temperature areas
(b) Frequent installation and removal areas
(c) Shear applications only
(c) Shear applications only
What does a triangle with a star in it indicate on a bolt:
(a) Reworked bolt
(b) Close tolerance bolt
(c) Magnetically inspected
(b) Close tolerance bolt
What does the term grip length describe on a bolt?
(a) Plain shank only
(b) Includes the threads
(c) Threaded portion only
(a) Plain shank only
Below what fraction does the number series come into use for a bolt diameter?
(a) 4/16
(b) 3/4
(c) 5/16
(a) 4/16
Which of the following uses a second nut to lock it?
(a) Plain nut
(b) Castle nut
(c) Wing nut
(a) Plain nut
What type of aluminium alloy is used in a ‘‘D’’ aircraft rivert?
(a) 2117
(b) 2024
(c) 2017
(c) 2017
Which head marking would be found on a ‘DD’ aircraft rivet?
(a) Dimple
(b) Teat
(c) Double Dash
(c) Double Dash
What material letter code would you associate with a 5056 alloy rivet?
(a) A
(b) D
(c) B
(c) B
Over what size must 2017 T3 rivets be - heat treated?
(a) Over 1/8 ‘’
(b) Over 5/32 ‘’
(c) 3/16 ‘’
(c) 3/16 ‘’
Which head marking would be found on an ‘‘AD’’ aircaft rivet?
(a) Dimple
(b) Teat
(c) Double Dash
(a) Dimple
Which aluminium alloy rivet has a ‘‘Raised Cross’’ marked on the thread?
(a) A
(b) AD
(c) B
(c) B
Which head marking on a rivet would signify a 2017 rivet?
(a) Dimple
(b) Teat
(c) Raised cross
(b) Teat
What material letter code would you associate with a 2017 alloy rivet?
(a) A
(b) D
(c) B
(b) D
Tension is a load desribed as: -
(a) A force that tends to compress
(b) A force that tends to stretch
(c) A forcet that tends to sever
(b) A force that tends to stretch
What is the Material letter code for rivets with a raised double dash on the head?
(a) AD
(b) D
(c) DD
(c) DD
Identify the head style on an MS20426AD4-7 rivet?
(a) Countersink
(b) Universal
(c) Round
(a) Countersink
MS20470D-6-5 indicates a rivet, which has:
(a) A shank length of 5/16’’ (excluding head)
(b) A shank length of 5/32’’ (excluding head)
(c) An overall length of 5/16’’
(a) A shank length of 5/16’’ (excluding head)
What are two common loads that rivets are subject to?
(a) Compression and tension
(b) Shear and tension
(c) Shear and torsion
(b) Shear and tension
What is the purpose of refrigerating 2017 and 2024 aluminium alloy rivets after heat treatment?
(a) To retard age hardening
(b) To accelerate age hardening
(c) To prevent work hardening
(a) To retard age hardening
When riveting magnesium structures what rivet type would you use?
(a) AD
(b) M
(c) B
(c) B
When carrying out the line maintenance and blind rivets have to be used, which of the following can not be used in place of a solid rivet?
(a) Cherry lock fastener
(b) Huck bolt fastener
(c) Cherry bulbed fastener
(a) Cherry lock fastener
What cherry fastener has a driving anvil?
(a) Cherry bulbed
(b) Cherry Lock
(c) Cherry Max
(c) Cherry Max
How many groups are the rivetnut lengths broken into?
(a) 2 grip groups
(b) 5 grip groups
(c) 6 grip groups
(c) 6 grip groups
In relation to cotter pins, the preferred method of installation is to: -
(a) Bend both legs around the nut
(b) Bend one leg over the bolt, not extending the diameter of the bolt, & bend the other leg down so as not to rest against the washer
(c) Use double wrap method
(b) Bend one leg over the bolt, not extending the diameter of the bolt, & bend the other leg down so as not to rest against the washer
What is another name for a PAL nut?
(a) Check Nut
(b) Wing nut
(c) Castle nut
(a) Check Nut
What is used to safety a castle nut?
(a) Locking wire
(b) Split pin
(c) Fiber washer
(b) Split pin
How many times can a lock clip on a turnbarrel be used?
(a) Twice
(b) Once
(c) As often as necessary
(b) Once
The woodruff key is: -
(a) A segment of parallel square
(b) A segment of parallel disc
(c) A segment of parallel triangle
(b) A segment of parallel disc
Machine screws are generally used: -
(a) In non structural application
(b) In structural applications
(c) Both a and b
(a) In non structural application
Which of the following are classed as lock washers?
(a) PLI washer
(b) Shake Proof washers
(c) Countersunk washers
(b) Shake Proof washers
An aircraft plain nut can be locked: -
(a) By using a cotter pin
(b) With a check nut
(c) An aircraft plain nut is a self-locking nut
(b) With a check nut
What is the name given to the part of an aircraft stud that is unthreaded?
(a) The metal area
(b) The plain area
(c) The tapered area
(b) The plain area
What is the name given to the fastener used on floor boards that installed and removed easily and allows screw installation?
(a) Clip nut
(b) Tinnerman nut
(c) Anchor nut
(a) Clip nut
How many times can a circlips be reused?
(a) Once only
(b) Twice - once either side
(c) As long as it’s serviceable
(c) As long as it’s serviceable
What type of aluminium alloy is used in an ‘‘AD’’ aircraft rivet?
(a) 2117
(b) 2024
(c) 2017
(a) 2117
Uses the aircraft structure to return electrical signal
The current a cable can carry without exceeding a specific voltage drop
Engine, APU and Air conditioning compartment
Wires used in high temperature areas
PTFE / KAPTON / PTFE
Grounded at one end in circuits operating below 50 kHz
Chromel and Alumel
ADF
150mm to 500mm
Shielded and Thermocouple wiring
1.0
2 indenting dots
(White and Blue are two)
Threaded
Correct mating of connectors
A small gap should be left between the insulation and the terminal
Aircraft Standard Practices when no manufacturers or maintenance data is available
Ensuring correct installations or computers
Copper terminals
20,000 Volts
Up to 250 Degrees
They are used to help prevent vibration
You can determine if the rod ends are sufficiently inserted into the push-pull rod
No of teeth driven gear /
No of teeth driving gear
Using lock clips / lockwire
Have two arms in a straight line
Indicates that the end of the barrel is left hand threaded
Non flexible
Cable tension regulators are used to tension cables under all temperature changes
Metallic pulleys are used in high temp areas
7 Strands, each containing 19 wires
Heart strand or king strand
Extra flexible
Allows a locking clip to be inserted into the barrel
3 threads
Reduce the shaft speed of a propeller
Change the direction of a chain run
A bevel
4 for each wire
Double helical
A 2% max elongation in total length
To indicate twisting of the hose
Tied to prevent it breaking its set
Reject the clamp
Green
Permaswage
Socket, nipple and nut
A standard roller bearing
Axial loads
Roller bearing
Cage type
A tapered roller bearing
A steel drift should be used
Anti-Freeze grease
Radial loads
Marked on the thrust face
Install ferrules
The outside of the pipe
On the clamp
In relation to an aircraft bearing, the term brinelling relates to:
(a) The bearing coming loose in the housing
(b) The bearing coming loose on the shaft
(c) Indentations on the bearing race
(c) Indentations on the bearing race
The bearings fitted on to a control cable pulleys are?
(a) Sealed and need no further lubrication
(b) Temporarily sealed but require lubrication at regular intervals
(c) Lubricate with aero shell fluid 17
(a) Sealed and need no further lubrication
Needle bearings have which of the following?
(a) No outer race
(b) No roller bearing
(c) No inner race
(c) No inner race
'’Squeeze film’’ with reference to a bearing can also be called?
(a) Fluid damped
(b) Cold flow
(c) Space saving
(a) Fluid damped
What type of fluid is used to lubricate control rod bearings?
Grease
Strength, Stiffness and impact resistance
Carbon fibre
Not cure fully
The fibres are short
The length of time a resin can be stored
Black
To the resin before the catalyst
Increase viscosity
Radiographic (x-ray)
Flat surfaces
Unidirectional weave
4’’
Info. on health precautions, flammibilty of material and ventilation
High shrinkage rate
1:1.2
Warp direction
Dull white to grey effect on fabric
70% humidity 18-20 degrees
The rate of increase in temperature
2’’ max only any surface
Compression failure in wood runs at right angle to the grain
Extruded areas
Stronger in shear load
Fretting corrosion
Irish Linen
When a cadmium plated steel bolt is installed in aluminium structure, in a corrosive environment,which material is more likely to corrode?
(a) The aluminium
(b) The cadmium
(c) The steel
(b) The cadmium
Sacrificial corrosion, cadmium will always go first
Filiform Corrosion
Herring bone stitch
Magnesium
Alkalis
A solution containing salt
Pitting
Exfoliation corrosion
Rift cut
Wood should have good modulus of elasticity in the grain direction
Glass beads
Shot penning
1:15
Grade A type for scarf 1:15
Grade B for 1:12
Compression shake
