Module - 06 (Materials & Hardware)
Final Practice Exam Test
- What temperature would steel be tempered at?
- At the annealing temperature
- Above the annealing temperature
- Below the annealing temperature
- At normal temperatures HC steel is harder because?
- it has more austenite
- of the % of carbon in the granules
- it has less austenite
- Nitriding is ?
- case hardening
- anodising
- tempering
- The annealing process on steel is required sometimes as it ?
- provides a corrosion resistant layer that prevents oxidation
- relieves internal stress suffered after engineering processes
- allows the material a greater stress per unit area
- The properties of pearlitic metal are that it is both ?
- strong but too and hard and brittle
- soft and weak
- strong without being brittle
- The socket section of an AN/MS connector is normally installed on ?
- either side of a circuit (makes no difference)
- the ground side of the circuit
- the power supply side of the circuit
- When installing coaxial cable, it should be secured along its entire length ?
- at 1-foot intervals
- at 2-foot intervals
- wherever the cable sags
- Solution treatment after manufacturers have performed it once can be carried out a further ?
- 3 times
- 1 time
- 2 times
- When buffing surface of Aluminium Alloy, what material are you removing?
- Oxide layer
- Aluminium
- Alloy
- Why are aluminium alloys used on aircraft, instead of pure aluminium?
- Lighter
- Corrosion resistant
- Stronger
- The process of forming a pure layer of aluminium over an aluminium alloy is ?
- cladding
- electroplating
- metalizing
- Cast iron is ?
The common bonding material for Tungsten Carbide is ?- very malleable
- tough
- heavy and brittle
- What is a Rockwell tester used for ?
aircraft will- Tensile Testing
- Hardness Testing
- Fatigue Testing
- The symbol 'W' on a material indicates ?
- it is for use on aircraft mainplanes only
- it has been solution treated and will respond effectively to precipitation treatment
- it is for workshop use only
- Composition of silver solder is ?
- tin, lead, silver and antimony
- tin, lead and silver
- tin and lead
- Precipitation treating makes the metal ?
- Precipitation treating makes the metal
- less strong and hard
- harder, stronger and less ductile
- The time between removal from heat treatment furnace and quenching must be not more than ?
- 05 seconds
- 10 seconds
- 15 seconds
- The metal which must not be heated in a salt bath is?
- magnesium alloy
- duralumin
- rivets made of alclad
- A material containing approximately 66% nickel and 33% copper is known as ?
- Nimonic
- Invar
- Monel metal
- Hooke's law states that, within the elastic region, elastic strain is?
- directly proportional to stress
- directly opposite to stress
- indirectly proportional to stress
- What type of a test involves stretching material until it breaks ?
- Fatigue Testing
- Hardness Testing
- Tensile Testing
- Two parts of the adhesive process are?
- wetting and gripping
- wetting and setting
- spreading and setting
- Polyester resin and glass fibre cloth, becomes ?
- PTFE
- PVC
- GRP
- A category of plastic material that is capable of softening or flowing when reheated is described as a ?
- thermoset
- thermoplastic
- thermocure
- The classification of high tensile strength fibreglass used in aircraft structures is ?
- G-glass
- E-glass
- S-glass
- Which of the following are generally characteristic of aramid fibre (Kevlar) composites ?
- High tensile strength, stiffness and ability to conduct electricity
- Flexibility, stiffness and corrosive effect in contact with aluminium
- High tensile strength and flexibility
- What tests are done on adhesive joints ?
- Impact and peel
- Shear and peel
- Impact and shear
- If you increase the amount of catalyst in a resin mixture ?
- the pot life will be decreased
- the material will become weaker
- the material will become stronger
- What is the largest hole in honeycomb repairable with microballoons ?
- 2.54 inches
- 2.54 mm
- 2.54 cm
- What does MSDS stand for ?
- Metal Surface Dimension Sector
- Material Safety Data Sheet
- Maximum Structural Design System
- With what would you check the bonded joints of a wooden aircraft structure ?
- A screwdriver
- A plastic strip
- A feeler gauge
- Replacement of a wooden spar is ?
- only permitted by the manufacturer
- a minor repair
- a major repair
- A surface patch to a plywood structure may be a large as ?
- 50 inch perimeter
- 50 inch diameter
- 50 sq.inch area
- The standard wood type for aircraft wood structures is ?
- douglas fir
- spruce
- pine
- Red heart and purple heart ?
- are harmless natural defects in wood
- are types of hard-wood
- are forms of decay in wood
- A faint line running across the grain of a wood spar generally indicates ?
- shear failure
- compression failure
- decay
- Lacing cord used on aircraft fabric covering must have a minimum breaking strength of ?
- 40 lb
- 80 lb
- 120 lb
- Aircraft fabric lacing cord is reinforced with ?
- lanolin
- epoxy
- wax
- Which of the following is true regarding aircraft dope type ?
- Either type of dope may be applied over the top of any type of dope
- Butyrate dope may be applied over the top of nitrate dope
- Nitrate dope may be applied over the top of butyrate dope
- A retarder is added to aircraft dope to ?
- produce a smoother finish
- to retard the application time
- to extend the shelf life
- What width of finishing tape should be used on a tear in a fabric cover which is 10 inches long ?
- 4 inches
- 6 inches
- 2 inches
- The threads per inch of Grade 'A' aircraft fabric is ?
- 60-64
- 110-115
- 80-84
- Corrosion caused by electrolytic action is the result of ?
- excessive anodization
- contact between two unlike metals
- the wrong quenching agent
- Exfoliation corrosion is sometimes referred to as ?
- sub-surface corrosion
- filiform corrosion
- layer corrosion
- Which is the following correct statement ?
- Selenious acid is used for the re-protection of aluminium alloys
- The chemical test for bronze is nitric acid which produces a white precipitate
- All corrosion is a chemical action
- Corrosion control begins at the ?
- production stage
- manufacturing stage
- design stage
- Corrosion caused by galvanic action is the result of ?
- excessive anodization
- contact between two unlike metals
- excessive etching
- What are the signs of fretting corrosion ?
- Black powder or cocoa staining
- Intergranular cracking
- Flaking
- Magnesium alloy components are protected by ?
- an electro process
- a chemical process
- a painted process
- Corrosion at the grain boundaries is called ?
- filiform
- fretting
- intergrannular
- Anti-corrosion treatment used on Magnesium is ?
- chromating
- electro-plating
- phosphating
- The pitch of a screw thread is ?
- 2 * crest to root
- crest to root
- crest to crest
- A metric screw thread angle is ?
- 37 °
- 57 °
- 60 °
- What sort of surface treatment would you find on a magnesium casting ?
- Chromating
- Phosphating
- Anodizing
- Studs which have a size larger thread at one end are called ?
- plain studs
- shouldered studs
- stepped studs
- A dowel will take what loads ?
- torsion
- tensile
- shear
- UNF means ?
- union national fine
- unified fine
- united nations fine
- Aircraft bolts are usually manufactured with a ?
- class 3 fit for the threads
- class 2 fit for the threads
- class 1 fit for the threads
- A spring type washer when used on an aluminium component must be used ?
- with a tab washer
- by itself
- with a plain washer
- Taper pins are subject to what loads ?
- Shear
- Compressive
- Tensile
- How is a British aluminium rivet identified ?
- Violet anodic finish
- Natural anodised finish
- Black anodic finish
- An aluminium alloy L37 rivet identification is ?
- D embossed
- O embossed
- X embossed
- The length of solid rivets is in graduations of ?
- 1/4 inch
- 1/8 inch
- 1/16 inch
- Countersunk rivets have two angles of countersink, these are ?
- 100 - 115 degrees
- 125 - 135 degrees
- 100 -160 degrees
- A 'HUCK' rivet is similar in design to a ?
- dome head rivet
- blind rivet
- cherry rivet
- What type loads cause the most rivet failures ?
- Bearing
- Head
- Shear
- How are flexible hoses categorised ?
- By diameter
- By maximum pressure
- By length
- How would you test a hydraulic hose ?
- Pressure test 1.5 * working pressure
- Pressure test 2.0 * working pressure
- Pressure test 1.0 * working pressure
- Which material is a hydraulic fluid hose made from ?
- Rubber
- Butyl
- Teflon
- A 0.5 in. diameter pipe is to be joined using standard nuts and fittings. What coupling would you use ?
- AN8-8852-2
- AN8-8852-8
- AN8-8852-1
- A self aligning bearing is a ?
- angular bearing
- precision bearing
- radial bearing
- What type of gear would be used on a propeller reduction gearbox ?
- Bevel
- Epicyclic
- Split epicyclic