moviles NUEVOS 6

How is the behavior of the action lines in a Tandem bearing?. The action lines converge towards the axis of the bearing. The action lines are parallel. The action lines diverge from the axis of the bearing.

What is the advantage of using wood?. It gives fragility to the component. None of the other answers is correct. Gives flexibility to the component.

For which metal are usually used, annealing, tempering and hardening treatments?. Copper. Steel. Aluminum.

Which kind of device is used to perform the Charpy impact test?. A pendulum. An arrow. A hammer.

Which of the following is a characteristic of Kapton cable?. It is semi-transparent with an orange colour. It is semi-transparent green in colour. It is semi-transparent and white in colour.

For which components it is suitable Monel?. Gears. Both the other answers are correct. Components requesting high strength and hardness.

How is the behavior of the action lines in a Face to Face bearing?. The action lines diverge from the axis of the bearing. The action lines are parallel. The action lines converge towards the axis of the bearing.

Which of the following is an important aspect for the correct functioning of a flat belt?. The correct tensioning of the belt. The width of the belt. The material of the belt.

In the oxygen concentration corrosion, how does the electrolyte behave?. As a cathode. None of the other answers is correct. As an anode.

Which is the element contained in steel other than the Iron?. Aluminum. Carbon. Manganese.

Which of the following elements are composing Monel?. Nickel, carbon and copper. Nickel, chromium and copper. Copper, nickel and small percentage of iron and manganese.

Which is the maximum size for aluminum cables used on aircrafts, following AWG standard?. 4. 6. 8.

Are helical spring's coils subjet to twisting motion when loaded?. Yes. Yes but only with tension loads. No.

Which of the following is the most commonly used threads?. Right-hand one. Upright one. Left-hand one.

Which of the following makes the oxidation process faster?. Heat. Dry air. High air density.

Which of these materials can suffer pitting corrosion?. Copper. Aluminum. Carbon.

Which is in percentage the weight reduction using composites instead of metals?. 0.5. 0.8. 0.2.

Where is used the V-band clamp normally?. In pneumatic and fuel systems at low pressure. In instrument systems. In water and waste systems.

What must be done before applying the dope on the fabric?. It is sufficient to clean the fabric. The fabric must be treated with a dope-proof paint. The use of doping do not require any kind of preparation.

Which materials are usually used for the cage of bearings?. Iron, aluminum and carbon. Magnesium and Tungsten. Copper, plastic resin, silver and light metals.

How it is locked the Oddie fastener?. Pushing the stud until it engages the leaf spring. Using a screwdriver. Using the Oddie installation kit.

What is the grip lenght, speaking about rivets?. It indicates the material thickness that can be connected by the blind rivet. None of the other answers is correct. It indicates the length of the portion of blind rivet that remains inside the drilled hole.

The major diameter of a male screw is: The distance between the top of the crests of the thread. The diameter of the head. The distance between the top of the roots of the thread.

The Weft direction for the fibers of composites is: Parallel to the Bias one. Parallel to the Warp one. Perpendicular to the Warp one.

Which device is important to be installed together with a control cable?. A corrosion sensor. A bonding connector. A tension regulator.

How many Flanged end fitting are characterizing the V-band clamp connector?. 2. 4. 3.

How much zinc is contained in "Cold gold" brass?. Extremely low percentage. High percentage. Low percentage.

How many layers are typically found in the structure of a low pressure hose?. 3. 4. 7.

How is composed the insulation layer of Nyvil cables?. PTFE, carbon braid and a nylon sheath. PVC, glass braid and a nylon sheath. PVC, glass braid and a PTFE sheath.

The main features of glass fiber are: Low tensile strength, high compression and shear strength. High tensile strength, low compression and shear strength. High tensile strength, high compression and shear strength.

Which is the operative pressure range for a medium pressure hose?. Up to 4000 psi. Up to 250 psi. Up to 1500 psi.

Are composite materials subject to crack propagation risk?. Yes but only in case of use of polyester matrix. No. Yes.

Where is usually installed the outer ring of a bearing?. On the shaft and is the rotating element. On the structure and is the static element. On the shaft and is the static element.

How can be installed blind rivets?. Using a drill. Using a riveting machine. Using a mallet and a plier.

What purpose did the fabric serve in old aircraft?. None of the other answers is correct. To develop lift. To make surfaces aerodynamic.

How is defined the weft direction in composite materials?. 90°. 0°. 45°.

Which of the following is a charachteristic of a Kapton cable?. It has high insulation properties. Both the other answers are correct. It shows high resistance from contamination by aircraft fluids.

What is the most common method the end the terminal part of the cable?. Melting. Crimping. End fittings.

Choose the environment where the corrosive risks are high: Polar areas and rural regions. Temperate regions, suburban areas and inland regions. Tropical areas, industrial regions and maritime areas.

Where is usually employed Inconel?. For pitot probes outside the cabin. For gears production. For temperature detection system probes.

In how many phases it is divided, generally, a heat treatment?. 3. 1. 2.

Which of the following is a characteristics of the coarse pitch thread?. None of the other answers is correct. It is used for hard material. It is used for soft material.

For which application are usually used spiral gears?. For applications where low stresses are involved. For applications where high stresses are involved. For applications where high folded angles are involved.

Roller bearings are able to bear: Lower radial loads compared to ball bearings. Higher radial loads compared to ball bearings. Higher axial loads compared to ball bearings.

Which of the following elements are composing the bearing?. Inner and outer ring. Rolling elements and the cage. Both the other answers are correct.

On what mainly it depends the choice of the bolt to be used?. On the application. Both the other answers are correct. On the kind of the material used.

Do non-ferrous materials suffer from corrosion?. No. Yes. Yes but for this material it is a positive phenomenon.

What happens if AWG increases?. The front section reduces. The front section expands. None of the others.

For which application are usually used honeycomb laminates?. For radomes. For cabin floor panels. For fuselage floor beams.

How can be installed a nut?. Using a mallet and a plier. Using a drill. Using a spanner.

51. Was the fabric supposed to develop lift?. Only for small aircraft. No. Yes.

Where usually develops microbiological corrosion?. Inside fuel tanks. Inside galleys and toilets. Both the other answers are correct.

Which of the following is not an NDI?. Eddy current inspection. Visual Inspection. Fatigue failure test.

Which of the following is a particular characteristics of a tapered pin?. It is a wire that passing trough a hole is avoiding relative motion between mating components. It is made by cadmium plated steel. It accept shear loads where no play is allowed.

To confirm the existence of a crack magnifying glasses with a minimum magnification of: 1. 2. 3. 10X. 20X. 5X.

Is it mandatory, while using epicyclical gears, that the rotation axes of the gears are parallel?. Yes, but only if the number of teeth is high. No. Yes.

Which of the following is the main characteristic of a Nylock stiff nut?. They have a nylon element inserted in one of their end. They are made by nylon. They are surrounded by a nylon element.

The identification of a crack using a torch requires that the light beam be directed at an angle: Between 1 and 5 degrees to the surface. Between 45 and 90 degrees to the surface. Between 5 and 45 degrees to the surface.

What is an "Autoclave"?. An oven with programmable temperature. A tank with assigned temperature. An oven with programmable temperature and pressure (either positive or negative).

What are cable tensioners also called?. Turnbuckles. End fittings. Crog.

Which of the following sentence is true about Titanium?. It shows low corrosion resistance. It shows high corrosion resistance. It shows high corrosion resistance, but has double weight compared to steel.

How much zinc is contained in "Deep Gold" brass?. High percentage. Low percentage. Medium percentage.

Ceramics can be defined as: Inorganic and metallic materials. Organic and metallic materials. Inorganic and non-metallic materials.

Is it possible to use spring washers on primary structures?. No. Yes. Yes but only if they have double coil.

When does fretting corrosion occur?. When there is a combination of pitting corrosion and inter-granular corrosion. When there is a combination of mechanical sliding between mating components and chemical corrosion. When there is a combination of mechanical action and pitting corrosion.

What was the fabric used for in aviation?. For surface panels. For the ribs. For the spars.

The name of the terminal part of the control cable is: Terminal dock. Conjunction. End fitting.

How is defined the Warp direction for composites?. As the 90° direction. As the 0° direction. As the 45° direction.

How long does it takes crevice corrosion to take place?. It is almost immediate. It takes few time. It takes long time.

Does water promote oxidation of metals?. Yes. Copper only. No.

How are affected the wood properties by knots?. They affect the stiffness. They have no effect. They affect the weight.

How is the behavior of the action lines in a Back to Back bearing?. The action lines converge towards the axis of the bearing. The action lines diverge from the axis of the bearing. The action lines are parallel.

Choose which of the following is a standard system for threads: Italian air force system. United nation system. British association system.

How has to be used the torch for proper illumination of the composite surface when searching for cracks?. Inclined. Flat. At a certain distance, anyway pretty far.

What is indicating the color band printed on a pipe?. The material used to create the pipe. The external diameter. The internal diameter.

Where is usually printed the thickness of a pipe?. On the pipe itself. On the accompanying documents. On a label.

Choose the material that has hardness value equal to 10 in Mohs scale: Diamond. Talc. Calcite.

The minor diameter of a female screw is: The diameter of the head. The distance between the top of the crests of the thread. The distance between the top of the roots of the thread.

What are the components of the dope used in aeronautics for fabrics?. Of plastics and solvents. Of resin and solvent. Of liquid natural rubbers.

The oxidation speed of a metal is: directly proportional to the temperature of the material. inversely proportional to the temperature of the material. not related to the temperature of the material.

Which device is used for the curing process of large composites areas, after the repairing?. A vacuum bag. An autoclave. An oven.

Which of the following elements are composing Inconel?. Copper, nickel and other components. Nickel, chromium and small percentages of iron and other elements. Nickel, carbon and copper.

Corrosion always lead to catastrophic effects?. Yes. No, if it is contained within certain limits. No, neve.

Which are the three main circles that can be recognized in a gear profile?. The inner, middle and outer circle. The clearence (base), pitch and addendum (tip) circle. There are no specifications regarding the gear profile.

A high pressure hose can be employed for a system working at a pressure of 5000 psi?. No. Yes. Yes but only if the seamless liner is made by rubber.

Why are usually used teleflex cables?. To provide a waterproof connection. To provide a one-way control. To provide a two-way control.

In Wholer test, at how many rpm is rotating the specimen?. 3000. 4000. 6000.

How is it called the clearence between the teeth of different wheels?. Backspace. Backlash. Uplash.

Which of the following is the characteristics of tersil cables?. Water resistance. Fire resistance. Union cables.

Which is the percentage of carbon included in "medium carbon steel"?. up to 0.2%. 0.3 to 0.7%. 0.1 to 0.3%.

What is always necessary before carrying out an NDI?. Clean the surface thoroughly. Reinstall the component on the aircraft. None of the other answers is correct.

What is the product of metal corrosion called?. Oxyde. Anode. Residual.

Is it still used wood for structural components realization?. Yes. No more. Only for old aircrafts that was realized in such way.

Which of the following element is connected to the ends of control cables?. the end fitting. the terminal. the locking plate.

What are Nyvil cables used for?. For general use. For outdoor use. For use in hot areas.

Do the instruments used to perform NDI need calibration?. Yes but only if used frequently. No never. Yes always.

Copper and Zinc are typical elements of: Galvanic reaction. Crevice corrosion. Pitting corrosion.

Choose the environment where the corrosive risks are moderate: Tropical areas, industrial regions and maritime areas. Temperate regions, suburban areas and inland regions. Polar areas and rural regions.

Considering the 1 series aluminum, what does indicates the last two digits of the identification code?. The alloying elements. The percentage of pure aluminium over the 99% of purity. The specific treatments done on the alloy.

Choose the materials that are alternating in a structure of high pressure hose?. Steel and carbon braid. Iron and impregnated cotton. Steel and impregnated cotton.

Which are the main parts of a screw?. Head, shank and thread. Bottom, shank and thread. Head, feet and thread.

Which is the basic concept that rules elecro-chemical corrosion. The ability of the anode and the cathode of the cell to absorb or remove neutrons. The ability of the anode and the cathode of the cell to absorb or remove protons. The ability of the anode and the cathode of the cell to absorb or remove electrons.

Which kind of loads are able to bear solid rivets (mainly)?. Shear loads. Tensions loads. Compression loads.

How is usually performed the cooling of the object after the heat treatment? 1. 2. 3. Both the other answer can be correct, it depends on the kind of treatment. Slow, in pure air, inside ovens. Fast, using water.

Which of the following materials has hardness value equal to 1 in Mohs scale?. Talc. Calcite. Diamond.

Which of the following feature is a common one for Birch wood?. It is malleable. It is highly impact-resistant. It is not flexible.

Is there the risk to damage either the cutting tool or the composite material while drilling it?. Yes. Yes but only for the composite. Yes but only for the cutting tool.

Usually which material is used for the gear wheels?. Iron. Steel. Aluminum.

Which is the scope of a cable terminal?. To avoid that the cable unroll. To protect the cable from corrosion. To connect the cable together with the system to be controlled.

Which is the purpose of NDI?. To check the airworthiness of a component by causing only minor damage. To check the airworthiness of a component by damaging it. To check the airworthiness of a component without damaging it.

Which of the following is not an NDI applicable to non-ferrous materials?. Visual Inspection. Inspection with magnetic particles. Penetrating fluids.

Which one of the following materials is defined as "Non ferrous"? 1. 2. 3. Iron. Copper. Steel.

Which are the main directions identified for the fibers of a composite material?. Warp and Weft. Warp Weft and Bias. Warp and Bias.

Compared to steel, how much is the density value of aluminium?. About half. About double. About a third.

The difference between the hight of the pendulum at the beginning and at the end of the Charpy impact test is proportional to: The kinetic energy used to break the specimen. The potential energy used to break the specimen. The thermal energy used to break the specimen.

How can be described the teeth of a helical gear?. Straight. Inclined. Curved.

Which is the most common metal used for electrical cables?. Copper. Steel. Iridium.

Which of the following is the most important step in defect identification?. Radiographic analysis. Visual Inspection. Eddy current test.

How it can be the inner conductor of a coaxial cable?. Stranded. Solid. Both the other answers are correct.

Which of the following types of wood has the highest strength-to-weight ratio?. Walnut tree. Red Spruce. Cherry tree.

A nut is generally used in association with: A bolt. A hammer. A calliper.

Double row radial ball bearings are: Slightly smaller than single row bearings and have higher load capacity. Slightly larger than single row bearings and have lower load capacity. Slightly larger than single row bearings and have higher load capacity.

The male thread is a: British Thread. External thread. Internal thread.

Which elements must be present to be able to start the corrosion? 1. 2. 3. Both the other answers are correct. Water. Air.

Are there fabrics used in aviation that do not need dope?. Yes. Yes but they are fabrics with other heat treatments. No.

Which of the following is a characteristic of ceramic material?. They are soft. They are very hard. They are elastic.

Which of the following aircraft parts could be made of Brass?. Control Cable terminations. Fittings and unions for pipes. Rivets.

Which tool can be used to lock/unlock Dzus fasteners?. A hand vice. A spanner. A screwdriver.

Which is the material usually used to create fairleads?. Plastic, Teflon and Rubber. Copper and aluminum. Steel and Titanium.

Which of the following properties is showing Magnesium?. Low flammability. Low corrosion resistance. High corrosion resistance.

With which kind of nuts are usually used cotter pins?. With pal nuts. With lock nuts. With castellated nuts.

How is generally the shank of a screw used for the bolt?. Fully plain. Fully threaded. Partially threaded.

What are grommets generally made of?. of teflon. of plastic. both answers are correct.

What happen when a dope, that has not correctly been preserved, is used on fabric?. There is the risk to damage the fabric. The dopes has a lower effect. There are no particular problems.

Which one of the following materials is defined as "Ferrous"?. Iron. Magnesium. Aluminium.

Which shape has the Indenter used for the Knoop Hardness Test?. Conical shape. Pyramidal diamond shape. Spherical shape.

Which of the following is a characteristic of an interconnect cable?. Both the other answers are correct. They have a higher weight compared to airframe cables. They have a lower weight compared to airframe cables.

Is it true that the tab washer (2 tabs) cannot be re-used?. No. Yes. Only in specific situations.

Which is the advantage in using a blind rivet?. They can be employed where the two parts of the structure are accessible. They can be employed if the two parts of the structure are not accessible. They can be employed if the two parts of the structure are made of the same material.

Which of the following is a possible defect on structural component mado of ferrous material?. Welding failure. Both the other answers are correct. Corrosion.

To which kind of load solid rivets shows weakness?. Tensile loads. Torsion loads. Shear loads.

What is improving the use of composites in creating components with particular shapes?. It is improving the aerodynamic (no fasteners), weight (reduced) and drag (reduced). It is improving the aerodynamic (no fasteners), weight (increased) and drag (increased). It is improving the aerodynamic (more fasteners), weight (reduced) and drag (reduced).

Where is possible to find the relevant structural procedures to repair components?. In the SRM. In the AMP. In the IPC.

Which is the percentage of nickel contained in Inconel?. 0.03. 0.8. 0.14.

Is it possible to plate the inner conductor of coaxial cable?. Yes, using tin, silver or gold. Yes, but only with tin. No.

Fire proof cables are designed to resist: 1100° for 15 minutes. 1100° for 5 minuters. 500° for 5 minutes.

Which kind of stresses is exchanging the spur gear?. Tangential stresses. Helical stresses. Thermal stresses.

Why it is important to grant a clearence in between the teeth of mating wheels?. To allow the thermal expansion/contraction of the material. To allow to accomodate the lubricant. Both the other answers are correct.

Which of the following sentence describe Monel characteristics?. High strength and hardness at high temperatures. High strength and hardness at low temperatures. Low strength and hardness at high temperatures.

Which of the following is NOT generally used while perfoming a visual inspection?. Mirrors. MPFD devices. Torches.

Which is the typical colour of the magnesium oxide powder?. White. Red. Grey.

Which of the following is not a class of bolts, according to the stresses they should suffer?. Torsion bolts. Tensile bolts. Shear bolts.

Which of the following is true about single direction thrust ball bearing?. They are made by a shaft washer, a housing washer and an assembly including balls and a cage. They are made only by a shaft washer and a housing washer. They are made by two housing washers and two assemblies with balls and cage.

In a spring feel system, the deformation of the spring is: Not proportional to the load. Related to the type of system in which it is installed. Proportional to the load.

The locking techniques calle "single or double wrap wire methods" are related to: Turnbuckles. Bolts. End fittings.

What is indicating the word "composite"?. The combination of two or more different materials. The fusion of two or more different materials. The bonding of two ore more different materials.

When the fabric must be replaced?. When its strenght goes below 50% of the original fabric. When its strenght goes below 30% of the original fabric. When its strenght goes below 70% of the original fabric.

Which of the following wood can be used for structural parts of the airframe?. The red spruce. The mahogany. The birch.

In a galvanic cell the typical electrodes are made by: Magnesium and Inconel. Iron and Aluminum. Copper and Zinc.

In an electrolytic cell, the redox reaction is: Not spontaneous. Spontaneous. Fast.

How is made the outer conductor of a coaxial cable?. It is a fine-braid copper wire tube. It is a solid silver conductor. It is a solid condutor.

What you may use to remove/insert a stud?. A stud box. Two spanners. One spanner.

The minor diameter of a male screw is: The distance between the top of the roots of the thread. The diameter of the head. The distance between the top of the crests of the thread.

What is necessary to create before the rivet installation on the material to be riveted?. A pre-drilled hole. A film of lubricant. An anti-corrosion treatment.

Which of the following sentence underline an important characteristic of the heating phasing, regarding heat treatments?. The heat must be distributed uniformly in all the object treated. The temperature at which the object is heated must be above those of phase transformation. The distribution of the heat inside the object is not relevant.

Which kind of materials are suffering corrosion?. Plastics. Ceramics. Metals.

Which of the following is the cable with the smallest diameter?. 15 AWG. 20 AWG. 10 AWG.

Which is the percentage of nickel contained in Monel?. 0.29. 0.03. 0.68.

The major diameter of a female screw is: The diameter of the head. The distance between the top of the crests of the thread. The distance between the top of the roots of the thread.

The crimped termination is: A method to terminate the electrical cable. A type of feature that only fire-proof cable may obtain. A method to melt the electrical cable.

The structure of wood is similar to the one of: Ceramic Material. Ferrous material. Composites.

A solid dowel pin is usually made by: Wood. Copper. Steel.

In which of the following operation 2 spanners must be used?. For stud polishing. For removal and insertion of studs. For the installation of cable terminations.

In the oxygen concentration cell corrosion, how does the area surrounding the electrolyte behave?. None of the other answers is correct. As an anode. As a cathode.

How is locked the solid rivet in its final position?. Trough a deformation. Trough a screwing action. Trough a drilling action.

How is it called the device used to remove a broken stud?. Camlock. Ezy-out extractor. Amal.

Which kind of wood is mahogany?. It is a soft wood. It is not a wood, it is a kind of composite material. It is a hard wood.

Is it possible to match two gear wheels with a different pitch?. Yes. No. Yes but only if the gears are made of aluminum.

What does it mean SRM?. Service Readmission Manual. Structural Repair Manual. Special Restoring Manual.

Where can be often found Inconel?. In hydraulic systems. In piston engines. In turbine engines.

How is defined the warp direction in composite materials?. 45°. 0°. 90°.

Considering a spring feel system, if the pilot wants to deflect more the control, how much force he has to apply?. Lower. Higher. The same as for a lower deflection.

How many threaded parts does the turnbuckle have?. Only one terminal. Three. Two.

Which is the most common type of gear profile?. The round one. The involute one. The spiral one.

Which kind of materials are usually included inside ceramics?. Carbides. Oxides and Nitrides. Both the other answers are correct.

Which of the following is true about the double direction thrust ball bearings?. They are made by a shaft washer, a housing washer and an assembly including balls and a cage. They are made by a shaft washer, two housing washers and two assemblies with balls and cage. They are made by only a shaft washer and a housing washer.

Which is the percentage of carbon included in "high carbon steel"?. 0.7 to 1.5%. up to 0.2%. up to 0.7%.

Which material is used for the core of Nyvil cable?. Tinned gold. Tinned copper. Tinned silver.

How many conductors are containing coaxial cables?. 1. 2. 3.

Through which test it is measured the resilience of a material?. It is measured with the Woler test. It is measured with the Charpy impact test. It is measured with the Knoop test.

On what depends the shear strength of the wood?. On the water content. On the grain direction. On the temperature.

The maximum operating temperature in Celsius of the Nyvil cable is: 65°. 75°. 80°.

Do solid rivets have a pre-formed head?. No. Yes, but only if they are made of aluminum. Yes.

Composite structures are affected by corrosion?. No. Only if the composite used is glass fiber. Yes.

Which of the following is a screw commonly used for non structural application?. Machine screw. Set screw. Sheet metal screw.

. Which element is increasing the speed of reaction between metals and oxygen (oxidation reaction)?. Carbon. Heat. Friction.

Why is required the use of doping on fabric?. To make the fabric harder. The use of doping is not required on fabric. To protect the fabric from water, air and sunlight.

At which temperature is usually performed the Nitriding treatment?. 250 °C. 1000 °C. 500 °C.

Which of the following material is usually used for the control cables?. Fibers. Steel. Iron.

Which is the purpose of a borescope?. To inspect areas not otherwise visible. To induce magnetic fields in an object in order to carry out inspections. To induce eddy currents on a surface in order to carry out inspections.

What is the most common method of creating terminations in electrical cables?. Crimping. Fusion. The use of End fittings.

Which other metals are usually alloyed together with Magnesium?. Aluminum. Manganese. Both the other answers are correct.

Where are usually installed Teleflex cables?. For propeller pitch change mechanism. Both the other answers are correct. For engine thrust control.

Which of the following sentence is true, when comparing composites to steels?. Composites has similar strength and are lighter than steel. Composites are weaker and heavier than steel. Composites are stronger and heavier than steel.

How is made the dope used on fabric?. It is made by a pigment and a resin. It is made by a solvent and a resin. It is made by a solvent and a pigment.

Where is usually installed the inner ring of a bearing?. On the shaft and is the static element. On the shaft and is the rotating element. On the structure and is the static element.

Which is usually the scope of a control cable onboard?. To open and close electrical circuits. To control the movent of actuators. To move the flight control surfaces.

How is also called the "crevice corrosion"?. Nitrogen concentration corrosion. Hydrogen concentration corrosion. Oxygen concentration corrosion.

Which is the main purpose of cotter pins?. To keep the screw in position during installation. To avoid that the nut loosen as consequence of vibrations. To keep the nut in position during installation.

Fire resistant cables are designed to resist: 1100° for 5 minutes. 500° for 5 minutes. 1100° for 15 minutes.

Which is the chemical product of the oxidation reaction in a metal?. A metal hidride. A metal carbide. A metal oxide.

In a galvanic cell, the redox reaction is: not spontaneous. fast. spontaneous.

What were the fabrics used in aviation?. Syntetics. Organic. Both other answers are correct.

The most commonly used screw thread is: Right-hand one. Up-hand one. Left-hand one.

How is usually made the matrix of a composite material?. It is usually made by thermplastic material. It is usually made by plyester and epoxy resins. It is usually made by rubber.

How is closed a right hand bolt?. Turning the screw anti-clockwise. Turning the screw clockwise. Trough a drilling action.

For what is particularly suitable yellow birch wood?. For the construction of the face plies of plywood. For the construction of laminates propeller. For the construction of structural parts.

Which of the following is a characteristics of the fine pitch thread?. It is used for soft material. It is used for hard material. None of the other answers is correct.

Which of the following is not a component of a flared connector?. A collar. A union nut. An o-ring.

What happens to the electrodes in a galvanic cell?. They exchanges protons. They slowly corrodes. Nothing.

The RPM of the pulley are: Inversely proportional to its diameter. Directly proportional to its diameter. Inversely proportional to its thikness.

What is necessary to apply on the fabric before the application of the dope?. A layer of grey varnish to reduce reflection. A dope-proof paint. Nothing particular.

Which are the main elements of a bolt?. A screw and a washer. A nut and a washer. A nut and a screw.

Which of the following are common dimensions for rivets common configurations?. 2/8", 4/16", 6/32". 4/8", 6/16", 10/32". 1/8", 3/16", 5/32".

How is computed the resilience of a material?. As the work performed to reach the fragile fracture divided by the surface area. As the surface area divided by the work performed to reach the fragile fracture. As the work performed to reach the fragile fracture multiplied by the surface area.

Are roller bearings able to withstand axial loads?. Yes but only with extra lubricant. Yes. No.

In which fibers direction is usually inserted a coloured fiber?. Weft. Bias. Warp.

What happens if I rivet an aluminum rivet on a steel panel?. There will be the development of corrosion. Nothing Special. The junction will be very resistant.

How is defined a defect?. As a generic non conformity. As any condition that reduces the serviceability of the component. As any condition that increases the serviceability of the component.

Which of the following is a characteristic of oddie nuts?. That of having vertical slots on the counter-bored end. That of having an embedded nylon ring. Do not have particular characteristics.

How are treated the protective layers of a Kapton cable?. With heat. With anti corrosive lubricants. With antistatic procedures.

Which is the melting point of Titanium?. 1000°. 600°. 1600°.

Considering a series 1 Aluminum, what does it means if the last two digits in the identification code are 50?. It means that this aluminum is 50% pure aluminium. It means that this aluminum is 99.75% pure aluminium. It means that this aluminum is 99.50% pure aluminium.

Mahogany wood is use for the construction of: Laminates propeller. Stuctural parts. Wooden propeller.

Which of the following is a characteristic of ceramic material?. Over a certain temperature they start to burn. They are able to bear quite low temperature. They are able to bear very high temperature.

What is the outer conductor of a coaxial cable generally made of?. Titanium. Copper. Iron.

How can be considered a blind rivet with respect to a solid one?. More corrodible. Weaker. Stronger.

Which of the followings sentence is true about the Spruce wood?. It is the weakest of all fir woods. It is the lightest. It is the strongest of all fir woods.

Which is the operative pressure range for a high pressure hose?. Up to 1500 psi. Up to 4000 psi. Up to 250 psi.

What is a stud?. It is a particular device that is used only together with washers. It is a particular screw that has two threaded ends. It is a particular nut that is able to seal the connection.

How much zinc is contained in "Copper Red" brass?. Low percentage. High percentage. Extremely High percentage.