Quiz about 701-800

Question 1

701. Which type of resin is not currently utilized on composite structures? (Level 2)

Accepted Answer

b) Thermoplastic resins

Answer

a) Epoxy resins

Answer

c) Phenolic resins

Question 2

702. Which factors have a positive effect on surface wetting? (Level 1)

Accepted Answer

a) Removal of surface contamination, Viscosity reduction through application of heat, Time and pressure at the bonding point.

Answer

b) Fingerprints left on adherent surfaces, Residues not removed from the adherent surfaces, Low temperatures, Incorrect or no surface pre-treatment.

Answer

c) Removal of surface contamination, Time and pressure at the bonding point, Low temperatures

Question 3

703. Which factors have a negative effect on surface wetting? (Level 1)

Accepted Answer

b) Fingerprints left on adherent surfaces, Residues not removed from the adherent surfaces, Low temperatures, Incorrect or no surface pre-treatment.

Answer

a) Removal of surface contamination, Viscosity reduction through application of heat, Time and pressure at the bonding point.

Answer

c) Removal of surface contamination, Time and pressure at the bonding point, Low temperatures

Question 4

704. Which type of damage is a skin not-perforated damage? (Level 2)

Accepted Answer

c) Abrasion, Debonding, Delamination, Nicks, Dents, Gouges, Scratches

Answer

a) Abrasion, Lightning strike, Delamination, Scratches, Dents, Holes, Gouges

Answer

b) Abrasion, Debonding, Delamination, Nicks, Dents, Holes, Gouges

Question 5

705. Which type of damage is a skin perforated damage (with damage of fibres)? (Level 2)

Accepted Answer

b) Holes, Lightning strike, Impact by foreign object (FOD)

Answer

a) Abrasion, Delamination, Scratches, Dents, Gouges

Answer

c) Abrasion, Debonding, Delamination, Nicks, Dents, Gouges, Scratches

Question 6

706. Which of the following statements is correct about Scratch damage? (Level 1)

Accepted Answer

c) Scratch is the result of contact with a sharp object and only surface fibres are affected and the edges are sharp

Answer

a) Scratch is damage to a surface caused by scuffing, rubbing or scraping of the component. Fibres are not damaged and mechanical performance is not affected.

Answer

b) Scratch is when a separation of materials, e.g. stringer to skin, occurs due to an adhesive failure

Question 7

707. Which of the following statements is correct about Abrasion damage? (Level 1)

Accepted Answer

a) Abrasion is damage to a surface caused by scuffing, rubbing or scraping of the component. Fibres are not damaged and mechanical performance is not affected.

Answer

b) Abrasion is when a separation of materials, e.g. stringer to skin, occurs due to an adhesive failure

Answer

c) Abrasion is the result of contact with a sharp object and only surface fibres are affected and the edges are sharp

Question 8

708. Which of the following statements is correct about Debonding damage? (Level 2)

Accepted Answer

b) Debonding is when a separation of materials, e.g. stringer to skin, occurs due to an adhesive failure

Answer

a) Debonding is damage to a surface caused by scuffing, rubbing or scraping of the component. Fibres are not damaged and mechanical performance is not affected.

Answer

c) Debonding is the result of contact with a sharp object and only surface fibres are affected and the edges are sharp

Question 9

709. Which of the following statements is correct about Lightning Strike damage? (Level 1)

Accepted Answer

a) The effect of a lightning strike depends on the material will not be the same. For non-conductive materials like Glass- and Aramid Fibre a large part of the component, if not completely protected, may be blown out because both skins are affected and the core generally vapourised due to the extreme heat

Answer

b) Lightning strike is when a separation of materials, e.g. stringer to skin, occurs due to an adhesive failure

Answer

c) Lightning strike is when the separation of plies occurs in a multi-laminate material. This can be caused by the material being hit (impact delamination), or when there is a resin failure for any other reason.

Question 10

710. Which of the following statements is correct about Delamination damage? (Level 2)

Accepted Answer

c) Delamination is when the separation of plies occurs in a multi-laminate material. This can be caused by the material being hit (impact delamination), or when there is a resin failure for any other reason.

Answer

a) Delamination is a deformity caused by extraneous forces, which are applied to the structure. This can be an impact (FOD) for example.

Answer

b) Delamination is when a separation of materials, e.g. stringer to skin, occurs due to an adhesive failure

Question 11

711. Which of the following statements is correct about Dent damage? (Level 1)

Accepted Answer

a) A dent is a deformity caused by extraneous forces, which are applied to the structure. This can be an impact (FOD) for example.

Answer

b) A dent is when a separation of materials, e.g. stringer to skin, occurs due to an adhesive failure

Answer

c) A dent is when the separation of plies occurs in a multi-laminate material. This can be caused by the material being hit (impact delamination), or when there is a resin failure for any other reason.

Question 12

712. Which of the following statements is correct about Erosion damage? (Level 1)

Accepted Answer

b) Erosion could affect all the leading edge surfaces, especially when the initial surface protection system has been damaged. Erosion, when undetected or unrepaired, may generate composite deterioration.

Answer

a) Erosion is the result of contact with a sharp object and only surface fibres are affected and the edges are sharp.

Answer

c) Erosion principally affects the resin and is generally due to accidental contact with aggressive chemical liquids or products (e.g. hydraulic fluid).

Question 13

713. Which of the following statements is correct about Chemical Degradation damage? (Level 2)

Accepted Answer

c) Chemical degradation principally affects the resin and is generally due to accidental contact with aggressive chemical liquids or products (e.g. hydraulic fluid).

Answer

a) Chemical degradation is the result of contact with a sharp object, only surface fibres are affected and the edges are sharp.

Answer

b) Chemical degradation could affect all the leading edge surfaces. Chemical degradation, when undetected or unrepaired, may generate composite deterioration.

Question 14

714. What testing methods can detect the presence of debonding and delamination damages? (Level 2)

Accepted Answer

b) Tap Testing, Ultrasonics

Answer

a) Tap Testing, Visual or optical inspection

Answer

c) Penetrant, Ultrasonics

Question 15

715. Which of the following statements is correct about Tap testing? (Level 1)

Accepted Answer

c) Tap testing is widely used for the quick evaluation of any accessible aircraft surfaces to detect presence of debonding or entrapped water.

Answer

a) Tap testing is only capable of finding flaws that are evident on the visible surface. Internal flaws in composites (such as delamination, disbonding and matrix crazing) are not detectable. In addition, tight surface cracks and edge delamination may not be detectable.

Answer

b) Tap testing is extremely sensitive in measuring small surface defects. The part to be inspected is stressed by the application of heat, a static load or vibration to bring out the effect of the flaw on the surface displacement

Question 16

718. What are the typical of repairs on Composite parts? (Level 1)

Accepted Answer

c) Injection repair, repair of edges and repair of coverings, honeycombs

Answer

a) Injection repair, repair of edges.

Answer

b) Repair of coverings and honeycombs

Question 17

719. Which of the following statements is correct about Repair through Injection of Resin? (Level 1)

Accepted Answer

b) The repair through injection of resin is an approved repair for delamination or dissolving adhesives. If the damaged is caused by contamination or water absorption, this type of repair is not recommended.

Answer

a) Repair through Injection of Resin is recommended for small damages of the honeycomb material. The area is filled with thickened resin/hardener alloy and in the next step made plane. However, the repaired area has lost nearly the half of its original strength.

Answer

c) Repair through Injection of Resin is typical for sandwich structures. It is easy to accomplish especially if the damaged parts are very small. Today two different repairs of sandwich parts can be accomplished:
_ Repair of the covering, if only one side of the covering and/or parts of the combs are damaged.
_ Repair of the covering, if both covering parts and the combs are damaged

Question 18

720. Which of the following statements is correct about Filling Repair? (Level 1)

Accepted Answer

a) Filling Repair Resin is recommended for small damages of the honeycomb material. The area is filled with thickened resin/hardener alloy and in the next step made plane. However, the repaired area has lost nearly the half of its original strength.

Answer

b) Filling Repair is an approved repair for delamination or dissolving adhesives. If the damage is caused by contamination or water absorption, this type of repair is not recommended.

Answer

c) Filling Repair is typical for sandwich structures. It is easy to accomplish especially if the damaged parts are very small. Today two different repairs of sandwich parts can be accomplished:
_ Repair of the covering, if only one side of the covering and/or parts of the combs are damaged.
_ Repair of the covering, if both covering parts and the combs are damaged

Question 19

721. Which of the following statements is correct about the Repair of honeycombs and covering? (Level 1)

Accepted Answer

c) Repair of honeycombs and covering is typical for sandwich structures. It is easy to accomplish especially if the damaged parts are very small. Today two different repairs of sandwich parts can be accomplished:
_ Repair of the covering, if only one side of the covering and/or parts of the combs are damaged.
_ Repair of the covering, if both covering parts and the combs are damaged

Answer

a) Repair of honeycombs and covering is recommended for small damages of the honeycomb material. The area is filled with thickened resin/hardener alloy and in the next step made plane. However, the repaired area has lost nearly the half of its original strength.

Answer

b) Repair of honeycombs and covering is an approved repair for delamination or dissolving adhesives. If the damage is caused by contamination or water absorption, this type of repair is not recommended

Question 20

722. A category of plastic material that is capable of softening or flowing when reheated is called? (Level 2)

Accepted Answer

b) Thermoplastic

Answer

a) Thermoset

Answer

c) Thermocure

Question 21

723. The length and of time that a catalyzed resin will remain in a workable state is called the (Level 2)

Accepted Answer

c) Pot life

Answer

a) Shelf life

Answer

b) Service life

Question 22

724. What is the purpose of the water break test? (Level 2)

Accepted Answer

a) Make sure the repair surface is clean of grease and contamination

Answer

b) Ensure that there is no further damage at the repair surface

Answer

c) Make sure the repair surface is clean of grease and contamination and no further damage at the repair surface

Question 23

725. What does Shelf Life mean? (Level 1)

Accepted Answer

b) The shelf life is the time which the product is still good in an unopened container and varies from product to product

Answer

a) Shelf Life is the length and time that a catalyzed resin will remain in a workable state

Answer

c) The shelf life is the time that resin remains suitable for application after it has been mixed.

Question 24

726. What are the effects of the Perforated Parting Film? (Level 1)

Accepted Answer

a) To prevent the bagging materials sticking to the repair surface. The film is perforated with small holes to allow air and gases to escape from the repair piles. Some resin will escape through the holes so, for repair, it is best to choose a film with pin-pricks to reduce the resin loss. Perforated parting film will produce a shiny, resin-rich surface on the repair.

Answer

b) To help even-out the temperature over the entire repair, help even-out the pressure over the whole repair and improve the flatness of the surface of the repair.

Answer

c) To allow the air and gases to escape easily

Question 25

727. What are the effects of the Caul Plate? (Level 2)

Accepted Answer

b) To help even-out the temperature over the entire repair, help even-out the pressure over the whole repair and improve the flatness of the surface of the repair.

Answer

a) To prevent the bagging materials sticking to the repair surface. The film is perforated with small holes to allow air and gases to escape from the repair piles. Some resin will escape through the holes so, for repair, it is best to choose a film with pin-pricks to reduce the resin loss. Perforated parting film will produce a shiny, resin-rich surface on the repair.

Answer

c) To allow the air and gases to escape easily

Question 26

728. What are the effects of the Breather Fabric? (Level 1)

Accepted Answer

c) To allow the air and gases to escape easily

Answer

a) To prevent the bagging materials sticking to the repair surface. The film is perforated with small holes to allow air and gases to escape from the repair piles. Some resin will escape through the holes so, for repair, it is best to choose a film with pin-pricks to reduce the resin loss. Perforated parting film will produce a shiny, resin-rich surface on the repair.

Answer

b) To help even-out the temperature over the entire repair, help even-out the pressure over the whole repair and improve the flatness of the surface of the repair.

Question 27

729. What are the effects of the Peel Ply? (Level 1)

Accepted Answer

a) To leave a rough finish. This produces a surface which can be painted or bonded without further sanding.

Answer

b) To provide an easy path for air to escape and to absorb any resin which comes through the holes in the perforated parting film.

Answer

c) To prevent resin soaking through onto the other bagging materials and the heater blanket.

Question 28

731. What are the effects of the Bleeder Cloth? (Level 2)

Accepted Answer

b) To provide an easy path for air to escape and to absorb any resin which comes through the holes in the perforated parting film.

Answer

a) To leave a rough finish. This produces a surface which can be painted or bonded without further sanding.

Answer

c) To prevent resin soaking through onto the other bagging materials and the heater blanket.

Question 29

732. What are the effects of the Heater Blanket? (Level 2)

Accepted Answer

a) Heater Blanket is used to control the temperature of the repair during the warm-up, cure and cool-down stages of the repair

Answer

b) Heater Blanket is used to reduce heat loss and to minimise the effects of draughts on the repair

Answer

c) Heater Blanket is used to seal the vacuum bag to the surface of the item under repair

Question 30

733. What are the effects of the Insulation? (Level 2)

Accepted Answer

b) Insulation is used to reduce heat loss and to minimise the effects of draughts on the repair

Answer

a) Insulation is used to control the temperature of the repair during the warm-up, cure and cool-down stages of the repair

Answer

c) Insulation is used to seal the vacuum bag to the surface of the item under repair

Question 31

734. What are the effects of the Bag Seating Tape? (Level 2)

Accepted Answer

c) Bag Seating Tape is used to seal the vacuum bag to the surface of the item under repair

Answer

a) Bag Seating Tape is used to control the temperature of the repair during the warm-up, cure and cool-down stages of the repair

Answer

b) Bag Seating Tape is used to reduce heat loss and to minimise the effects of draughts on the repair

Question 32

735. Basically, what is corrosion? (Level 1)

Accepted Answer

a) Corrosion is defined as an undesirable, natural reaction of materials with substances in their environment

Answer

b) Corrosion is defined as a desired chemical reaction of materials with substances in their environment

Answer

c) Corrosion is a type of mechanical abrasion that reduces material thickness

Question 33

736. If there is an area with worm-like traces on the surface of the aluminum alloy, what kind of corrosion is it (Level 1)

Accepted Answer

b) Filiform Corrosion

Answer

a) Electrochemical Corrosion

Answer

c) Galvanic Corrosion

Question 34

737. Why is pitting corrosion dangerous (Level 1)

Accepted Answer

a) Because it has no obvious signs on the surface of the metal so it is difficult to detect. In addition, the corrosion extends in the vertical direction so it reduces material strength

Answer

b) Because it has no obvious signs on the surface of the metal so it is difficult to detect. In addition, the corrosion extends in the horizontal direction so it reduces material strength

Answer

c) Because it is the most difficult type of corrosion to repair

Question 35

738. When you immerse a electrode metal bars in electrolyte fluid, what will happen with the Anode? (Level 2)

Accepted Answer

c) Positively charged metal-ions are emitted to the electrolyte, and leave behind negatively charged electrodes in the metal

Answer

a) The dissolved ions take in electrons and deposit as metal atoms on the electrode surface, which means that the metal ions are reduced

Answer

b) This is an oxidation-reduction reaction

Question 36

739. When you see the white-grey powdery on surface of steel, what does it mean? (Level 2)

Accepted Answer

a) Mean nothing

Answer

b) This is a sign of corrosion on surface

Answer

c) This is the production of the oxidation on steel surface

Question 37

740. In a Galvanic Cell made from Zn (Anode) and Cu (Cathode), which electrode is oxidized (Level 3)

Accepted Answer

b) Zn

Answer

a) Cu

Answer

c) None

Question 38

741. What will happen if Austenitic steel works under high temperature? (Level 2)

Accepted Answer

a) It can lose their corrosion resistance ability

Answer

b) Steel characteristics do not change, due to their high thermal strength

Answer

c) They will become softer

Question 39

743. Aluminum alloy has good corrosion resistance right? (Level 2)

Accepted Answer

a) Wrong

Answer

b) Right

Answer

c) It depends on the main metal in the alloy

Question 40

744. With aluminum alloys are used on aircraft, which part plays the role of corrosion resistance (Level 2)

Accepted Answer

c) A thin layer of pure aluminium on surface is a means of corrosion protection

Answer

a) The main metal composition in the alloy will determine its corrosion resistance

Answer

b) Due to the low strength of aluminium alloy, it is unsuitable for aircraft structures

Question 41

745. Why say Corrosion of metals is the tendency to return to their natural state? (Level 2)

Accepted Answer

c) Because in nature, except some noble metals, almost metals do not exist in their pure form, exist only in the form of metal ores (oxides)

Answer

a) Because in nature metals exist in the form of alloys

Answer

b) Because in nature, almost all metals exist in the form of noble metals, thus alloys tend to return to their metal oxides form

Question 42

746. What are the basic conditions for the formation of corrosion? (Level 1)

Accepted Answer

a) Material, environment and the chemical reaction of material with environment

Answer

b) Material, inert gas and the chemical reaction of material with gas

Answer

c) Material, Oxygen and temperature

Question 43

747. In a mechanical joint between aluminum alloy and copper, which material will be corroded first (Level 2)

Accepted Answer

b) Aluminum alloy

Answer

a) None of them, because they are corrosion resistance

Answer

c) Cu

Question 44

748. Corrosion occurs when two dissimilar metals make electrical contact in the presence of an electrolyte, what is it? (Level 1)

Accepted Answer

a) Galvanic corrosion

Answer

b) Electrochemical Corrosion

Answer

c) Fretting Corrosion

Question 45

749. There is a damage on the surface of the ALCLAD sheet, the depth of which exceeds 7% of the thickness of the metal sheet. If not repaired, what kind of corrosion is most likely to occur? (Level 3)

Accepted Answer

a) Intergranular Corrosion

Answer

b) Fretting Corrosion

Answer

c) Filiform Corrosion

Question 46

750. Name one method of corrosion protection that uses electrochemical reactions (Level 3)

Accepted Answer

b) Electroplating technique

Answer

a) Electrolysis

Answer

c) Electrochemical

Question 47

751. Why aircraft fuselage structure joints use aluminum alloy rivets and not steel or monel rivets? (Level 2)

Accepted Answer

c) This will minimize corrosion due to the dissimilar metal of rivets and aircraft structures

Answer

a) Because aluminum alloy rivets are easy to install

Answer

b) Because aluminum alloy rivets have better strength and less susceptible to corrosion than others

Question 48

752. When there is corrosion on aircraft structures, what are its consequences? (Level 2)

Accepted Answer

b) Aircraft structures are reduced mechanical strength, functional impairment or destroyed if these damaged structures are not repaired appropriately

Answer

a) The Aircraft is inoperable

Answer

c) The aircraft is not allowed to operate until the damaged structures are replaced

Question 49

753. During routine aircraft maintenance, a fuel sample is usually taken for inspection. One of the purposes of this is to prevent corrosion in the fuel tank. Why? (Level 3)

Accepted Answer

a) Because in the fuel tank may have water and microorganisms can grow in the tank. This will cause corrosion of the fuel tank structure

Answer

b) Because the fuel in the tank can be mixed with the electrolyte solution, leading to electrochemical corrosion

Answer

c) Because the fuel in the tank can change its chemical structure, turning it into structural corrosive substances

Question 50

754. In 2 metal joints: 
1: between aluminum alloy 2024 and tin, 
2: between 2024 and Zinc. 
In which joints aluminum alloy 2024 will be corroded first after a period of working time (Level 3)

Accepted Answer

a) In the joint between 2024 and Tin

Answer

b) In the joint between 2024 and Zinc

Answer

c) None of them

Question 51

755. How many part of the Hi-Lok and Hi-Lite (pin threaded) fastener: (Level 1)

Accepted Answer

c) There are two parts: Threaded pin with a head (universal or countersink) and collar with an internal thread, an external hexagonal drive and an external
shear groove

Answer

a) There are one parts: Collar with an internal thread, an external hexagonal drive and an external

Answer

b) There are one parts: Threaded pin with a head (universal or countersink)

Question 52

756. Pin (threaded) fasteners are usually installed in interference-fit holes? (Level 2)

Accepted Answer

a) TRUE

Answer

b) FALSE

Answer

c) Not given

Question 53

757. A clearance fit hole (unless specified differently) must be used if one or more of the structural members to be attached are made of? (Level 2)

Accepted Answer

b) Steel, Stainless steel, Titanium

Answer

a) Aluminum alloy

Answer

c) Application for all material

Question 54

758. Can install the pin (threaded) fasteners with power or hand tools? (Level 1)

Accepted Answer

c) Yes, depending on the position the power/hand tools can access.

Answer

a) Not allow

Answer

b) Just hand tools

Question 55

759. When blind rivets which are used for repair work on the aircraft? (Level 2)

Accepted Answer

c) At the locations in an aircraft structure, which are very hard to reach for riveting - it is impossible to set a rivet snap at the other site of the rivet

Answer

a) At the locations in an aircraft structure, which are need the heavy load

Answer

b) At the locations in an aircraft structure, which are need the light load

Question 56

760. How to identify material and type of solid rivets are identified by? (Level 1)

Accepted Answer

a) Symbol and shape on head of rivet

Answer

b) Shape of rivet

Answer

c) Length of rivet

Question 57

761. Which type of solid rivet may used in tank sealing rivets? (Level 2)

Accepted Answer

c) Type AD- and DD rivets

Answer

a) Type A- and DD rivets

Answer

b) Type A- and AD rivets

Question 58

762. Which symbol on TAPER-LOK HEAD MARKS is Heat Resistant Alloy? (Level 1)

Accepted Answer

b) CB

Answer

a) HB

Answer

c) H

Question 59

763. Which symbol on TAPER-LOK HEAD MARKS is 6Al4V Titanium Alloy? (Level 1)

Accepted Answer

b) V

Answer

a) HB

Answer

c) H

Question 60

764. A Lockbolt (pin swaged) fastener is a two-piece assembly consisting of: (Level 1)

Accepted Answer

c) A pin with a protruding or countersink head and a collar

Answer

a) A pin with a protruding or countersink head

Answer

b) A collar

Question 61

765. Which type of fit are used to install Lockbolt pins in thin structure? (Level 2)

Accepted Answer

a) Clearance fit

Answer

b) Transitionfit

Answer

c) Interference Fit

Question 62

766. Which type of fit are used to install Lockbolt pins in thick structure? (Level 2)

Accepted Answer

a) Clearance fit

Answer

b) Transitionfit

Answer

c) Interference Fit

Question 63

767. Which type of fit are used to install Lockbolt pins in any structure? (Level 2)

Accepted Answer

c) Interference or transition fit

Answer

a) Interference Fit

Answer

b) Transitionfit

Question 64

769. Do Monel rivets need to be heat treated before use? (Level 1)

Accepted Answer

a) No

Answer

b) Yes

Answer

c) Not given

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