M6 MATERIALS & HARDWARE

What does Warp indicate in fabric? (3.10) 3.9. Warp indicates the direction of highest strength in fabrics. Warp indicates the direction of lowest strength fabrics. Warp indicates the direction of the longest fiber in the fabric.

Bowden cable is suitable for (10.7). Transmission of torsion movements. Transmission of high-force linear movements between two remote locations. Transmission of low-force linear movements between two remote locations.

Preformed flexible hose (6.10). May be reshaped in any other position. May be fully straightened with no limitations. May never be fully straightened.

Bulkhead groove for transmission of the cable through bulkhead - shall be (10.4) ESTABA MAL RESPONDIDA. Of the material than cable. Of harder material than cable. Of softer material than cable.

Tab test method is not reliable for structures with more than (3.26) 3.24. Ten plies. One ply. Four plies.

A relay is (11.32) 11.30. An electrical security device and are usually installed in circuit breaker panels. An electrical power conversion. An electro-magnetic operated switch and are usually installed in junction boxes.

Pitch of the chain (9.9). Is the length of inner chain Plate. Is difference between two neighbour-roller Axis. Is width of the Chain.

One of copper and copper alloys good characteristics is (2.10). Low electrical and heat conductivity. High electrical and heat conductivity. High electrical and heat resistance.

Nickel alloys are used for springs which (7.4). Operate on higher temperatures. Operate on lower temperatures. Operate on high corrosion exposed conditions.

Wires of two systems that are redundant to each other (11.36) 11.32. Shall run through the same connector. May run through the same connector. Must run through different connector.

Final product of corrosion process? (4.4). Metallic chlorides. Metallic dioxides. Metallic oxides.

Two part sealant is (3.7). Sealant made from two compounds (base and accelerator) mixed just before its use. Sealant made from two compounds (base and accelerator) mixed in manufacture. Sealant made from two compounds (base and water) and are initially packed separately.

Taper lock fastener (5.34) 5.38. Is designed to completely fill the hole of the joint and carries very high loads. Doesn't fill the hole of the joint completely thus carries only small loads. Is designed to completely fill the hole of the joint and carries only small loads.

To prevent copper wire oxidation it is many times (11.3). Titanium plated. Gold plated. Tin plated.

If during Rockwell testing the material is softer than C-20 (2.20) 2.17. Then BRINELL tester should be used. The testing is not valid. B-scale is used.

In aviation desirable wire size is (11.5) 11.6. Bigger than size 20. Smaller than size 20. Bigger than size 1.

When choosing conduit its diameter shall be (11.23). 25% smaller than bundle diameter. 25% bigger than bundle diameter. 75% bigger than bundle diameter.

Anti-chafe tape is used on? (3.113). Sharp protrusions, rib caps, metal seams, and other areas to provide a smoother surface to keep the fabric from being torn. It is used on inner surface due to reinforcement of fabric. It is not used.

Over expanded honeycomb can be bent in which direction? (3.21) 3.19. In all directions. Across the ribbon direction. Perpendicular to the ribbon direction.

What property of titanium alloy makes it very good for welding? (2.9) 2.8. Around 75% of iron. Around 75% of copper. Around 5% of Aluminium and 2.5% of tin.

Normalising is the process when (1.17) 1.16. Material is released of internal stresses. Material is released of internal deformations. Material is released of granular corrosion.

During Nitriding process (1.20) 1.17. Nitrogen reacts with sulfur and creates nitrids. Nitrogen reacts with aluminium and creates nitrids. Nitrogen reacts with iron and creates nitrids.

Fabric sealer surrounds the fibers in the fabric whith a protective coating to provide (3.115). adhesion and keep out dirt and moisture. the sealer is the first coat applie to the polyester fabric after it is attached eothe airframe and heat shrunk to fit snugly. adhesion and keep out dirt and moisture. it is used only for aerobatic airplanes , to reduce stress on fabric coverd surfaces.

Wires of two system that are redundant to each other (11.36). shall run though the same connector. may run though the same connector. must run though different connector.

Bulheat grooves - for transmission of the cable though bulhead - shall be (10.4). of the material than calble. of harder material than able. of softer material than cable.

Prepreg fabric - what does it mean? (3.10) (3.15). Cured reinforced glass fabric. Soaked (with epoxy resin) reinforced graphite fabric. Partially cured impregnated (with resin) reinforced fabric.

A primary cause of intergranular corrosion is: (4.7). Improper heat treatment. Dissimilar metal contact. Improper application of primer.

Coaxial cables repairs (11.17) ?? (11.29). Are never done - always replace the cable. Can not be repaired at all. Can be done with special approved data procedure or with the use of connectors.

Rib bracing tape is used on wing ribs ? (3.113) (3.102). It is not used. After the fabric is installed. Before the fabric is installed.

The matrix in composite structure is: (3.9) (3.8). The central member of the composite material. The bonding material which is outer layer of composite material. The material which is made from foam.

Laminated wood is (3.84) (3.77). Assembled product of wood and glue where grains of each wood ply are placed in parallel to adjacent ply. Assembled product of wood and glue where grains of each wood ply is 90° placed to adjacent ply. Assembled product of wood and some other composite material.

Fretting corrosion is most likely to occur: (4.9). When two surfaces fit tightly together but can move relative to one another. Only when two dissimilar metals are in contact. When two surfaces fit loosely together and can move relative to one another.

A bolt with a triangle on the head is classified as an (5.5). NAS standard aircraft bolt. NAS close tolerance bolt. AN corrosion resistant steel bolt.

Shakeproof lock washers (5.15) (5.17). Can not be used in high vibration joints. Can be used only once. Can not be used in heated areas.

"Shop head" on the rivet is the one which is made (5.21) (5.27). By hammer or pneumatic tool. When rivet is manufactured by hand. By the rivet manufacturer.

Taper-lok fastener (5.34) (5.38). Is designed to completely fill the hole of the joint and carries very high loads. Doesn't fill the hole of the joint completely thus carries only small loads. Is designed to completely fill the hole of the joint and carries only small loads.

Which is the major disadvantage of swaged fitting assembly? (6.8) (6.10 – 6.7). Not enough reliable. Too slow to make. Not possible to disassemble without destruction.

Which are the main parts of AN fluid line fitting assembly? (6.3) ???. Flare, made on the tube, nut and MS fitting. Flare, made on the tube, AN sleeve, nut and AN fitting. Tube, AN sleeve, which makes a groove in the flareless tube, nut and AN fitting.

Flexible hoses equipped with swaged fittings (6.10). Are ordered by correct length and tested at manufacture and can not be shortened by mechanic. Can be assembled by mechanic. Are ordered by correct length and tested at manufacture and can be shortened by mechanic.

The core material of Alcad 2024-T4 is (2.13) (2.11). Heat treated aluminium alloy, and the surface material is commercially pure aluminum. Commercially 100% pure aluminum, and the surface material is heat treated aluminum alloy. Strain hardened titanium alloy, and the surface material is commercially pure aluminum.

Pinion gear is the expression (9.6) (9.3). For larger of two mating gears. For smaller of two mating gears. For small gears (e.g. for watches).

Which are the most important disadvanteges of control cables? (10.2). High weight, low loadability, often creates play in the system. Cable extends with the time, sensitive to temperature changes wear after longer operation, carries only pull loads. More expensive and complex as other control transmission means.

Connectors must be safety - Wired (11.35) (11.32). In all areas in the A/C. In areas of high vibrations. In areas of low temperatures.

Which material can not be heat treated repeatedly without harmful effects? (2.13) ???. Thermoplastic materials. Stainless steel. Clad aluminum alloy.

Annealing of aluminum as preparation for cold working is cooling down (2.19) (2.14). In ice. In strong air stream. In still air conditions.

What is generally used in the construction of aircraft engine firewalls? (2.8) (2.7). Stainless steel. Chrome molybdenum alloy steel. Titanium alloy.

Pure aluminium 1100 has (2.12) (2.11). Low corrosion resistance. High corrosion resistance. High heat treatment ability.

Stress releaving process - for non-ferrous material (2.16). Is used for aluminium alloys only. Is used for Titanium. Both aluminium alloys and iron-base metals.

The aluminum code number 1100 identifies what type of aluminum? (2.5) (2.11). Aluminum alloy containing 11 percent copper. Aluminum alloy containg zinc. 99 percent commmercially pure aluminum.

Alclad is a metal consisting of (2.13) (2.11). Aluminum alloy surface layers and a pure aluminum core. Pure aluminum surface layers on an aluminum alloy core. A homogeneous mixture of pure aluminum and aluminum alloy.

Hot water quenching of aluminum alloys (2.14) (2.12). Maximize distortion comparing it to cold spray water quenching. Maximize distortion comparing it to cold water quenching. Minimize possibility of distortion comparing it to cold water quenching.

In which type of composite repair procedure (layout) prepreg reinforced fabric is listed? (3.12) ???(3.15). Wet layout. Dry layout. Soaked layout.

Which statement is true? (3.14) (3.13). Carbonis 1 000 000 times more electrically resistive than aluminium. Epoxy resin is 1 000 000 times more electrically resistive than aluminium. Epoxy resin is 1 000 times more electrically resistive than aluminium.

Tensile Testing (Inch) is? (1.22) (1.21). Measures toughness of metal or ability to withstand sudden shock or impact. When we inflate and deflate the cabin of the airplane. Expressed in terms of pounds per square inch.

In Rockwell testing measurement material (2.20) (2.17). With hardness C-70 is harder than material with hardness C-20. With hardness C-20 is harder than material with hardness C-70. With hardness C-30 is harder than material with hardness C-35.

The composite material is only strong (3.9) (3.8). In direction of a fiber. In direction perpendicular to the fiber. In direction of a fiber and perpendicular to the fiber.

The Maule punch tester, a spring-loaded device with its scale calibrated in breaking strength? (3.121) (3.109). Tests lace strength by pressing against it while the fabric is still on the aircraft. Tests fabric strength by pressing against it while the fabric is still on the aircraft. Tests rainforce tape strength by pressing against it while the fabric is still on the aircraft.

Warp stands for (3.111) (3.10). The direction accros the length of fabric. The direction along the length of fabric. A cut made diagonally to the warp of fabric.

Which property of metalic materials is toughness? (1.3) (1.2). That material does not return into original shape after load removal. That material require high amount of load and plastic deformation to brake. That material permits to be deformed.

If aluminum alloy after cold working is to hard we can soften it by (2.16) (2.14). Thermal expansion. Annealing. Quenching.

Rockwell Hardness Tester ? (2.19) (2.17). Indicates hardness value by shape that penetrator leaves in the metal after application under known pressure. Is operated by pressing 10-mm hardened steel ball under load of 3000 kg into surface of specimen and measuring diameter of impresion with microscope. Indicates hardness value by measuring depth that penetrator advances into metal under known pressure.

Impact tests? (2.21) (1.22). Measures toughness of metal or ability to withstand sudden shock or impact. Specimen mounted in fixture and supported at both ends with V or notch placed on side opposite direction of pendulum's swing. Expressed in terms of pounds per square inch.

Coaxial cables need special attention (11.37). Because they can be easily damaged. Because they are so tiny. Because they are so expensive.

Which is the fastest quenching media? (1.14). Oil. Water. Brine.

Why is steel tempered after being hardened? (1.16) (1.17). To increase its hardness and ductility. To increase its strength and decrease its internal stresses. To relive its internal stresses and reduce its brittelness.

Which are the properties of ferrous materials? (1.3). Having aluminum as a main constituent. Having iron as a main constituent. Having magnesium as a main constituent.

Tempering is always applied (1.16) (1.15). After hardening of material. Before hardening of material. Between two attempts of hardening of material.

The best properties of high carbon steel parts is achieved by (1.6) ???(1.16). Casting. Annealing. Forging with heat treatment.

Which or the following are all hardness testing machines? (1.21) (1.19). Izod and Brinell. Rockwell and Brinell. Rockwell and Izod.

What is cladding of Aluminium (2.14) (2.13). Surface protection with the of pure Aluminium on Sheet of aluminium alloy. Plating protection of Aluminium. Additional layer on aluminium sheet to improve strength.

Generally speaking, bolt grip lengths should be (5.4) (5.41). One and one half times the thickness of the material which is fastened together. Equal to the thickness of the material which is fastened together, plus approximately one diameter. Equal or less than thickness of materials which are fastened together.

Pure aluminum is: (2.2) (2.3). Highly resistant to the corrosion. Non resistant to the corrosion. Reasonably (medium) resistant to the corrosion.

Titanium is often round in (2.25) ??? (2.16). Engine gearbox. Engine turbine blades. Engine inlet construction.

For aluminum alloys the time between soaking and quenching is (2.15) (2.12). Is important only if it is more than 30 seconds. Is not important. Very important.

Non-ferrous metals are: (2.3). All metals which have elements other than aluminum as their base or principal constituent. All metals which have elements other than iron as their base or principal constituent. All metals which have elements Other than nickel as their base or principal constituent.

Pure aluminium 1100 has (2.12) (2.11). Low corrosion resistance. High corrosion resistance. High heat treatment ability.

Heating Magnesium alloy in salt bath (2.15). May result in corrosion of alloy. May result in explosion. Cracking.

Measuring depth of penetration made by a penetrator under known load is used for ? (2.19) (2.17). Hardness testing. Impact resistance testing. Strenght testing.

What is the most important advantage of composite structures? (3.3). Resistance to hydraulic fluids. Reduced weight. Resistance to higher temperatures.

With hardness testing we measure (2.19) (2.17). The electrical current during penetration of hardened ball into measured material. The electrical resistance during penetration of hardened ball into measured material. The resistance to penetration into measured material.