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MAT & PROCESS
| Question | Answer |
|---|---|
| Magnetic particle inspection is used primarily to detect | flaws on or near the surface |
| Liquid penetrant inspection method may be used on | ferrous metals, nonferrous metals, nonporous plastics |
| A nondestructive testing method suitable for the inspection of the most metals , plastics and ceramics for surface and subsurface defects? | Ultrasonic inspection |
| What defects are not acceptable of metal lines. | Cracked flare , seams, dents in the heel of a bend 20% of the diameter, scratches/ nicks on the inside of a bend less than 10% of wall thickness , Dents in straight section that are 20% of tube diameter |
| A nondestructive testing method requires little or no part preparation, is used to detect surface or near surface defects in more metals, and may also be used to separate metal or alloys and their heat-treat conditions | Eddy current inspection |
| What method of magnetic particle inspection is used most often to inspect aircraft parts for invisible cracks and other defects | Continuous |
| Factors are considered essential knowledge for x-ray exposure | Processing of the film, material thickness and density, film characteristics |
| The testing medium that is generally used in magnetic particle inspection utilizes a ferromagnetic material that has | high permeability and low |
| May be used with steels which have been that treated for stressed applications | Residual magnetizing inspection |
| A mechanic had completed a bonded honeycomb repaid using the plotted compound repaid technique. What nondestructive testing method is used to determine the soundness of the repair after the repair had been cured? | Metallic ring test |
| What two type of indicating mediums are available for magnetic particle inspection | iron and ferric oxides |
| What material may be inspected using a magnetic particle inspection method | iron alloys |
| One way a part may be demagnetized after magnetic particle inspection is by | slowly moving the part into an AC magnetic field of sufficient strength |
| What type of crack can be detected by magnetic particle inspection using either circular or longitudinal magnetization | Longitudinal crack |
| Which of the following methods may be suitable to use to detect cracks open to the surface in aluminum forging and casting? | Dye penetrant , eddy current , ultra sonic and visual |
| To detect a minute crack using dye penetrant inspection usually requires | A longer then normal penetrating time |
| Which of the following is the main determinant of the dwell time used when conducting a dye or fluorescent penetrant inspection | size and shape of the discontinuities being looked for |
| When checking an item with the magnetic particle inspection method, circular and longitudinal magnetization should be used | reveal all possible defects |
| In magnetic particle inspection, a flaw that is perpendicular to the magnetic field flux line generally causes | a large disruption in the magnetic field |
| The pattern for inclusion is a magnetic particle buildup forming ? | parallel lines |
| A part which is being prepared for dye penetrant inspection should be cleaned with | volatile petroleum-base solvent |
| under magnetic particle inspection, a part will be identified as having a fatigue crack under which condition | the discontinuity is found in a highly stressed area of the part |
| in preforming a dye penetrant inspection the developer | acts a blotter to produce a visible indication |
| what defects will be detected by magnetizing a part using continuous longitudinal magnetization with a cable ? | defects perpendicular to the long axis the part |
| circular magnetization of a part can be used to detect which defects | defects parallel to the long axis of the part |
| what type of corrosion may attack the grain bound aries of aluminum alloys when the heat treatment process has been improperly accomplished | intergranular |
| what describes the effects of annealing steel and aluminum alloys | decrease in internal stress and softening of the metal |
| which heat treating process of metal produces a hard, wear resistant surface over a strong tough core? | case hardening |
| which heat treatment operation would be preformed when surface of the metal is changed chemically by introducing a high carbide or nitride content | case hardening |
| normalizing is a process if heat treating | iron base metals only |
| what occurs when a mechanical force is repeatedly applied to most metals at room temperature such as rolling, hammering or bending | metals become cold worked, strain or work hardened |
| the reheating of a heat treated metal such as with a welding torch | can significantly alter a metals properties in the reheated area |
| why is steel tampered after being hardened | to relieve its internal stresses and reduce its brittleness |
| what aluminum allow designation indicate that the metal has received no hardening or tempering treatment | 3003-F |
| What material cannot be heat yearned repeatedly without harmful effects | Clad aluminum alloy |
| Why is steel tempered after being hardened | To relieve its internal stresses and reduces its brittleness |
| When reheating of a heat thread metal such as with a welding torch | Can significantly alter a metals properties in the reheated area |
| What occurs when a mechanical forces is repeatedly applied to most metals at room temp such as rolling , hammering or bending | The metals become cold worked , strain or work hardened |
| Which of the following describe the effect of annealing steel and aluminum alloys | Decrease in internal stress and softening of the metal |
| Which heat treating process of metal produces a hard , wear resistant surface over a string tough core | Case hardening |
| Which heat treating operation would he preformed when the surface of the metals is changed chemically by introducing a high carbide or nitride content | Case hardening |
| Normalizing is a process of heating treating | Iron base metals only |
| What is the main determinant of the dwell time use when conducting a dye or fluorescent penetrant inspection | The size and shape of the discontinuities being looked for |
| When checking an item with a magnetic particle inspection method , circular and longitudinal magnetization should be used to | Reveal all possible defects |
| Magnetic particles inspection , a flaw that is perpendicular to the magnetic field flux likes generally causes | A large disruption in the magnetic |
| The pattern for an inclusion is a magnetic particle buildup forming | Parallel line |
| If dye penetrant inspection indication are not sharp and clear , the most probable cause is that the part | Was not thoroughly washed before the developer was applied |
| What is the descriptive of the annealing process of steel during and after it has been annealed | Slow cooling , low strength |
| Unless otherwise specified , torque values for tightening aircraft nut and bolts relate to | Clean , dry threads |
| What is generally used in the construction of aircraft exhaust collectors , stacks and manifolds | |
| What metal has a short time heat properties and is used in the construction of aircraft firewalls | Titanium alloy |
| Unless otherwise specified or required aircraft bolts should be installed so that the bolt head is | Upwards , or in arearward direction |
| Alaclad is a metal consisting of | Pure aluminum surface layers on an aluminum allow core |
| A fiber-type , self locking nut must never be used on an aircraft of the bolt | Subject to rotation |
| Self locking nuts may be used on aircraft provided that | The bolt or nuts is not subject to rotation |
| The SAE and the American iron and steel institute used a numerical index system to identify the composition of various steels. In the number 4130 designating chromium molybdenum steel. The first digit indicates the | Basic alloying element |
| Aircraft bolts with a cross or asterisk marked on the bold head are | Standard steel bolts |
| General speaking. Bolt grip lengths should be | Equal to the thickness of the material which is fastened together |
| When the specific torque value for nuts is not given, where can the recommended torque value be found | AC 43.13-1B |
| Particular component is attached to the aircraft structure by use of an aircraft bolt and a castle tension nut combination. If the cotter pin holes does NOT align within recommend torque. The acceptable practice is to | Change washer and try again |
| How is a clevis bolt used with a fork end cable terminal secured | With a shear nut tightened to snug fit but with no strain imposed on the fork and safeties with a coffee pin |
| Where is the AN clevis bolt used airplane | Only for shear load application |
| The core material of Alclad 2024-T4 is | Heat treated aluminum alloy and the surface material and commercially pure aluminum |
| The aluminum code number 1100 identifies what type of aluminum | |
| 99 % commercially pure aluminum | |
| Aircraft bolts are usually manufactured with a | Class 3 fit for the threads |
| In the four-digit aluminum index system number 2024 the first digit indicates ? | The major alloying element |
| How is the lock feature of the fiber type locknut obtained | By the use of an unthreaded fiber locking insert |
| Why should an aircraft maintenance technician be familiar with weld nomenclature | In order to gain familiarity with the welding techniques, filler material and temperature range |
| Why is it considered good practice to normalize a part after welding | To relieve internal stress developed within base metal |
| Holes and a few projections globules are found in a weld. What’s actions should be taken | Remove all old weld , and reweld joint |
| Which combination indicates a part has cooled to quickly after being welded | Cracking adjacent to the weld |
| One characteristic of a good weld of that no oxide should be formed on the base metal at a distance from the weld of more then | 1/2 inch |
| In examining and evaluating a welding joint. A mechanic should be familiar with | Lively ambient exposure conditions and intended use of part, along with type of weld and original part material composition |
| On a filet weld , the penetration requirement includes what percentages of the base metal thickness | 25-50% |
| What tool can be used to measure the alignment of a rotor shaft or the plane of rotation of a disk | Dial indicator |
| Dividers DO NOT provided readings when used as a | Measure device |
| Which tool is used to measure the clearance between a surface plate and relativity narrow surface being checked for flatness | Thickness gauge |
| Which number represent the vernier scale graduation of a micrometer | Parallel lines on a sleeve Given indication of one ten thousandths of an inch 0.0001 inch |
| Which tool is used to find the center of a chart or other cylindrical work ? | Combination set |
| If it’s is necessary to accurately measure the diameter of the hole approx. 1/4 in in diameter The mechanic should | Small hole gauge and determine the size of the hole by taking a micrometer reading of the ball end of of the gauge |
| What tool is generally used to set a divider to an exact dimension | Machinist scale |
| What tool is generally used to calibrate a micrometer or check accuracy | Gauge blocks |
| What precision measure tool is used or measuring crank pin and main bleating journals for our of of round wear | Micrometer caliper |
| The side clearness of piston rings are measured with a | Thickness gauge |
| How can the dimensional inspection of a bearing in a rocker arm be accomplished | Telescopic gauge and micrometer |
| The twist a connecting rod is checked by installing push fit arbors in both ended supported by parallel steel bars in a surface plate. Measurement between arbor and the parallel bar with a | Thickened gauge |
| The clearance between the piston rings and the ring land is measured with a | Thickness gauge |
| What may be used to check the steam on a poppet type valve for stretch | Micrometer |
| Which tool can be used to determine piston pin out of round wear | Micrometer caliper |
Created by:
Candacec6