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75 Cards in this Set
- Front
- Back
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What property of a metal is to allow it to be rolled and extruded without fracture?
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Malleability
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What property of a metal is to allow it to be permanently extended by a tensile force?
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Ductility
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What measurement of strength is an ability to withstand a crushing force?
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Bearing
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What is a measure of a materials stiffness and rigidity within its elastic range?
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Youngs Modulus
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The ‘Brinell Hardness’ test measures the indentation of what size and shape object?
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A 10mm hardened steel ball
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What is the growth stage of a fatigue fracture known as?
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Propogation
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What is the most common use of high carbon steel?
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Springs / Cutting Tools
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What alloying material increases a steels melting point?
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Tungsten
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What process to steel improves toughness with a modest drop in strength?
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Tempering
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When steel is heated to a solid solution so the carbon is evenly distributed what is the structure called?
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Austenetic
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What type of hardening involves locally heating areas of steels containing carbon and then quenching?
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Flame/Induction
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What percentage carbon is high carbon steel?
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0.5 to 1.5%
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Aluminium alloyed primarily with magnesium would be given a designation number of what?
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5xxx
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A material containing approximately 66% nickel and 33% copper is known as what?
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Monel
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If you increase the amount of catalyst in a resin mixture, what will happen to its pot life?
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Decreases
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What two components of a three part polyester resin are dangerous to mix together directly?
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Accelerator and catalyst
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What type of seal would be used in a low pressure brake system, below 1000 psi.
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'U' ring type
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What term is used to describe a collection of parallel fibres?
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Rovings
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Which method can be used to inspect fibreglass/honeycomb structures for entrapped water?
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Radiography
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When inspecting a composite panel using the ring test/tapping method, a dull thud may indicate what?
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Separation of laminates
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What is the maximum permissible grain deviation in wood?
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1:15
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What is the reason for using aluminium-pigmented dope on a fabric covered aircraft?
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To block UV radiation
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What would be the effect of adding salt to the electrolyte solution in an electrochemical process?
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The solution resistance will decrease
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What are the signs of fretting corrosion?
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The presence of a black powder
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Which type of corrosion may have no visual surface indication.
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Intergranular
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What would be the visual signs of filiform corrosion on aluminium alloy component?
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Thread like lines of corrosion under the paint
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What colour is the corrosion found on the surface of aluminium alloys?
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White/Grey
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What effect would an increase of temperature have on oxidisation?
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Increase in the oxidisation rate
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How do you measure the pitch of a screw thread?body
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Crest to Crest
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Which thread designations is most fatigue resistant?
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UNJ/UNJF
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An AN steel bolt is identified by what method?
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An ‘X’ stamped on the head
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What were Rivnuts originally used for?
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Attaching de-icing boots
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What is a typical dielectric fluid used during electro-discharge machining?
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Kerrosine
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What is the process of heat treating aluminium alloy and allowing it to cool slowly?
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Annealing
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What class of thread fit is considered to be standard?
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Class 3
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What British system is used on bolts less than ¼ inch diameter?
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BA
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Where are stepped studs used?
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In soft materials
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What is the area where the minor diameter increases to the shank?
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Runout
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Which fastener is used where a cowling has to both hinge and be quickly removable?
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Pip pin
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Which taper pin is measured by its small end?
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A metric pin
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How can you identify a Cherry Lock rivet before it is formed?
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Lock ring is visible
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How is a British aluminium rivet identified?
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It is coloured black
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How many times can shake proof washers be used?
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Once
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A rivet that has 5% magnesium is identified by what markings?
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Green colour and an ‘X’
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How are rigid and semi-rigid pipes classified?
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Length, Outside Diameter and wall thickness
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How are high-pressure hoses distinguished from medium pressure hoses?
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By their smooth outer cover
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What angle of flare is used on the AN pipe system?
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74 degrees
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What process is required after forming an Avdel rivet?
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Mandrel must be milled
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What type of graph would a Belleville spring produce?
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Non Linear
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Which type of wire would springs that are subject to hot areas be made from?
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Chrome-vanadium steel wire
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Cylindrical needle roller bearings are best for what type of movement?
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Oscillatory
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Which roller bearing would be used to accept a small degree of misalignment?
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Spherical
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Why do roller bearings accept greater loads than ball bearings?
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They have a greater contact area
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In what situations are needle roller bearings best utilised?
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Where there are space restrictions
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Roller bearings accept which type of loads?
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Radial
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Why are V section belts less prone to slippage than flat?
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Greater contact area
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Which gear system is used to transmit drive between two intersecting axes?
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Bevel
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What is the speed of a pinion, which has 21 teeth, and is driving a spur gear (which has 63 teeth) at 1,100 rpm?
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3300rpm
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How is the change in direction of a control chain, in two planes, achieved?
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By the use of a bi-planer block
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Above what percentage chain elongation will a chain require replacement?
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2%
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What type of gear would be used on a propeller reduction gearbox?
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Epicyclic
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What methods can be used to check a turnbuckle is in safety?
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Use the inspection hole or count the threadsshowing.
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What are pulleys manufactured from?
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Phenolic Resin and fibre mix
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What type of pin would hold a pulley to a shaft?
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Roll pin
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Control cables are classified by either their diameter or what other measurement?
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Minimumbreaking load
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What type of cable has a high tensile steel wire with a right or left hand helix wire wound on to it.?
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Teleflex
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What is the purpose of a pulley?
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In order to change a cable's direction
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If a cable is likely to ride off a pulley, what is fitted?
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A cable guard
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Bearings from which group would be used for precision applications where the smallest radial internal clearances are required?
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Group 2 (One dot)
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What component is used to allow multiple mechanisms to be operated by one input
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Junction box
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What is used to reduce the possibility of fouling, vibration and fluctuations in a cable run?
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Fairlead
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Before working on a Cable Tension Regulator, what must be carried out?
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The mechanism must be 'snubbed'
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What type of Elastomer is best suited for oil and fuel seals
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BuNa 'N'
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What type of solder has zinc as part of its alloying make-up
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Hard solder
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What metal can be electrolytically deposited onto metals to provide a hard wearing surface?
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Chromium
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