DGCA MODULE 06 PART 01 PDF

WWW.EASAQUESTIONPAPERS.BLOGSPOT.COM PART -66 MODULE 6 PART -1 Visit to download all latest EASA / DGCA CAR 66 Module examination Question papers and study material Module 06. Materia...

WWW.EASAQUESTIONPAPERS.BLOGSPOT.COM PART -66 MODULE 6 PART -1 Visit to download all latest EASA / DGCA CAR 66 Module examination Question papers and study material Module 06. Materials & Hardware Option A. greater brittleness. Option B. greater hardness. 1(www.dgcaquestionpapers.in), Like us on Facebook @ fb/DGCAQuestionPapers ( All CAR 66 Module Exam QP Available Option C. relief of internal stress after 01a. Aircraft Materials - Ferrous. hardening. Correct Answer is. relief of internal stress after hardening. Question Number. 1. When drilling Explanation. Tempering is done to relieve stainless steel, use a. internal stresses. Option A. drill ground to 120 °, slow cutting speed. Option B. drill ground to 90 °, fast cutting Question Number. 5. The addition of speed. chromium to steel will produce. Option C. drill ground to 90 °, slow cutting Option A. toughness. speed. Option B. hardness. Correct Answer is. drill ground to 120 °, slow Option C. ductility. cutting speed. Correct Answer is. hardness. Explanation. NIL. Explanation. Chromium is alloyed with steel to make it harder. Question Number. 2. How is a material galvanised?. Question Number. 6. Chromium added Option A. Sprayed with nickel solution. to plain carbon steel. Option B. Packed in a drum containing zinc Option A. increases it's resistance to dust and heated. corrosion. Option C. Dipped in a bath of molten zinc. Option B. turns it into a non-ferrous alloy. Correct Answer is. Dipped in a bath of molten Option C. makes the metal softer. zinc. Correct Answer is. increases it's resistance to Explanation. NIL. corrosion. Explanation. Chromium, when added to steel increases its hardness and corrosion resistance Question Number. 3. What temperature (hence CRS). would steel be tempered at?. Option A. At the annealing temperature. Option B. Above the annealing temperature. Question Number. 7. The purpose of case hardening is to. Option C. Below the annealing temperature. Option A. produce a hard case over a tough core. Correct Answer is. Below the annealing Option B. reduce the carbon in the steel. temperature. Option C. introduce carbon into the steel. Explanation. NIL. Correct Answer is. produce a hard case over a tough core. Explanation. Case hardening hardens the Question Number. 4. Tempering steel surface only. Page gives. DOWNLOAD OUR MOBILE APP FROM PLAY STORE @DGCA QUESTION PAPERS IF YOU HAVE PREVIOUS SESSION QUESTION PAPERS, SHARE WITH US AT [email protected]  WWW.EASAQUESTIONPAPERS.BLOGSPOT.COM PART -66 MODULE 6 PART -1 Visit to download all latest EASA / DGCA CAR 66 Module examination Question papers and study material Question Number. 12. With respect to Question Number. 8. At normal ferrous metals which of the following is true?. 2(www.dgcaquestionpapers.in), Like us on Facebook @ fb/DGCAQuestionPapers ( All CAR 66 Module Exam QP Available temperatures HC steel is harder because. Option A. Iron is not any element of ferrous Option A. it has more austenite. metals. Option B. of the % of carbon in the granules. Option B. Iron is a main element and most ferrous metal are magnetic. Option C. it has less austenite. Option C. Iron is a main element and ferrous Correct Answer is. of the % of carbon in the metals are not magnetic. granules. Correct Answer is. Iron is a main element and Explanation. NIL. most ferrous metal are magnetic. Explanation. The Latin for iron is 'Ferrum' Ferrous metals are named thus, and most are Question Number. 9. Nitriding is. paramagnetic with the exception of some stainless steels. Option A. tempering. Option B. anodising. Option C. case hardening. Question Number. 13. The annealing Correct Answer is. case hardening. process on steel is required sometimes as it. Explanation. Nitriding is a form of case hardening. Option A. provides a corrosion resistant layer that prevents oxidation. Option B. allows the material a greater stress Question Number. 10. Medium carbon per unit area. steels have a carbon content of. Option C. relieves internal stress suffered Option A. 0.3 - 0.5 %. after engineering processes. Option B. 0.5 - 0.8 %. Correct Answer is. relieves internal stress Option C. 0.8 - 1.05 %. suffered after engineering processes. Correct Answer is. 0.3 - 0.5 %. Explanation. Annealing is to relieve internal Explanation. Medium carbon steel is 0.3 - 0.6% stresses. (approx). FAA AC43 4-1. Question Number. 14. Cobalt steel tested Question Number. 11. A ferrous metal on the Brinell test would have a BHN number contains. between. Option A. aluminium. Option A. 100 to 175. Option B. iron. Option B. 300 to 400. Option C. magnesium. Option C. 600 to 700. Correct Answer is. iron. Correct Answer is. 600 to 700. Explanation. Ferrous' is from the Latin for iron. Explanation. Cobalt steel (used in cobalt drills) has a very high hardness (600-700 BHN or 60-65 Rockwell C). BL/10-3. Page DOWNLOAD OUR MOBILE APP FROM PLAY STORE @DGCA QUESTION PAPERS IF YOU HAVE PREVIOUS SESSION QUESTION PAPERS, SHARE WITH US AT [email protected]  WWW.EASAQUESTIONPAPERS.BLOGSPOT.COM PART -66 MODULE 6 PART -1 Visit to download all latest EASA / DGCA CAR 66 Module examination Question papers and study material Question Number. 15. If a material is Option A. heating under the UCP and slow found to be in the tertiary phase of creep the cooling. 3(www.dgcaquestionpapers.in), Like us on Facebook @ fb/DGCAQuestionPapers ( All CAR 66 Module Exam QP Available following procedure should be implemented:. Option B. heating over the UCP and fast cooling. Option A. The component should under go Option C. heating over the UCP and slow dye penetrant process and condition monitored. cooling. Correct Answer is. heating under the UCP and Option B. The crack should be stop drill, slow cooling. condition monitoring should be applied. Explanation. To temper steel, heat to BELOW Option C. The component should be the Lower Critical Temperature (LCT) and cool replaced immediately. either slowly or quench in water. Correct Answer is. The component should be replaced immediately. Explanation. The tertiary phase of creep occurs Question Number. 19. Austenitic just before complete failure of the component. stainless steels are. BL/10-3 3.11.3. Option A. magnetic. Option B. non-magnetic. Option C. hardened by heat treatment. Question Number. 16. What is used for Correct Answer is. non-magnetic. marking out steels?. Explanation. Austenitic stainless steel is non- Option A. Engineers blue. magnetic. Option B. Wax crayon. Option C. Copper sulphate. Correct Answer is. Copper sulphate. Question Number. 20. The formation of Explanation. Copper sulphate is used for steel depends upon. marking steel. Workshop Technology Part 1 Pg Option A. the formation of pearlite into 209. austenite. Option B. the formation of austenite into pearlite. Question Number. 17. Phosphating of Option C. the presence of pearlite in the steels is carried out by immersing the steel in to a structure. solution of. Correct Answer is. the formation of austenite Option A. phosphoric acid and metal into pearlite. phosphates. Explanation. Austenite exists above the LCT and Option B. nitric acid and sulphur. turns into pearlite as the steel cools. Option C. metal phosphates and sulphuric acid. Correct Answer is. phosphoric acid and metal Question Number. 21. How is residual phosphates. magnetism removed after an NDT examination?. Explanation. CAIPs BL/7-4 1.1. Option A. EMI. Option B. EMC. Question Number. 18. Tempering entails. Option C. Degaussing. Page Correct Answer is. Degaussing. DOWNLOAD OUR MOBILE APP FROM PLAY STORE @DGCA QUESTION PAPERS IF YOU HAVE PREVIOUS SESSION QUESTION PAPERS, SHARE WITH US AT [email protected]  WWW.EASAQUESTIONPAPERS.BLOGSPOT.COM PART -66 MODULE 6 PART -1 Visit to download all latest EASA / DGCA CAR 66 Module examination Question papers and study material Explanation. Degaussing is another name for demagnetising. Question Number. 25. When normalising, 4(www.dgcaquestionpapers.in), Like us on Facebook @ fb/DGCAQuestionPapers ( All CAR 66 Module Exam QP Available the material is. Option A. quenched immediately. Question Number. 22. The hardness of Option B. left to cool in room temperature. steel depends upon. Option A. formation of pearlite into Option C. cooled slowly. austenite. Correct Answer is. left to cool in room Option B. formation of cementite. temperature. Option C. the iron austenite grain structure. Explanation. Cool in air when normalising. Correct Answer is. formation of cementite. Explanation. Cementite (iron carbide) is the hard grain structure that precipitates from the Question Number. 26. Cast iron is. austenite as high carbon steel cools from above the UCT. Option A. very malleable. Option B. tough. Option C. heavy and brittle. Question Number. 23. The difference Correct Answer is. heavy and brittle. between annealing and normalizing is. Explanation. NIL. Option A. both are heated above the UCT, cool slowly to anneal, cool in air to normalize. Option B. both are heated below the UCT, Question Number. 27. Case hardening cool in air to anneal, cool slowly to normalize. can be carried out on. Option C. both are heated above the UCT, Option A. titanium. cool in air to anneal, cool slowly to normalize. Option B. any ferrous metal. Correct Answer is. both are heated above the Option C. duralumin. UCT, cool slowly to anneal, cool in air to normalize. Correct Answer is. any ferrous metal. Explanation. NIL. Explanation. Both are heated above the UCT, but the only difference is, cool slowly (in the furnace) to anneal, cool in air to normalize. Question Number. 28. Exhaust systems are usually made from stainless steel which is susceptible to. Question Number. 24. Normalizing of Option A. surface corrosion. steel is done to. Option B. filiform corrosion. Option A. remove residual stress of the Option C. intergranular corrosion. manufacturing process. Correct Answer is. intergranular corrosion. Option B. make steel softer. Explanation. NIL. Option C. restore the fatigue life of steel. Correct Answer is. remove residual stress of the manufacturing process. Question Number. 29. When metal is first Explanation. NIL. heated slightly above its critical temperature and Page DOWNLOAD OUR MOBILE APP FROM PLAY STORE @DGCA QUESTION PAPERS IF YOU HAVE PREVIOUS SESSION QUESTION PAPERS, SHARE WITH US AT [email protected]  WWW.EASAQUESTIONPAPERS.BLOGSPOT.COM PART -66 MODULE 6 PART -1 Visit to download all latest EASA / DGCA CAR 66 Module examination Question papers and study material then cooled rapidly it is common that the metal Question Number. 33. After a product will increase in. has been manufactured and all heat treatment has 5(www.dgcaquestionpapers.in), Like us on Facebook @ fb/DGCAQuestionPapers ( All CAR 66 Module Exam QP Available Option A. brittleness. been carried out the stress remaining if any is Option B. both of the above. termed as. Option C. hardness. Option A. residual stress. Correct Answer is. both of the above. Option B. working stress. Explanation. This is the process of hardening Option C. applied stress. (ferrous) metals. Correct Answer is. residual stress. Explanation. NIL. http://www.physiqueindustrie.com/residu Question Number. 30. Steel is tempered. al_stress.php Option A. after hardening. Option B. before hardening. Question Number. 34. Annealing steels. Option C. to increase hardening. Correct Answer is. after hardening. Option A. toughens the metal. Explanation. Tempering is to reduce the Option B. makes the metal malleable. brittleness caused by hardening. Option C. makes the metal brittle. Correct Answer is. makes the metal malleable. Question Number. 31. If a steel Explanation. A&P Technician General Textbook component is operated below the fatigue limit. Chap 7 page 3. The fatigue life is. Option A. finite. Option B. infinite. Question Number. 35. Tempering of Option C. depend on its proof stress. hardened steel is carried out to. Correct Answer is. infinite. Option A. retain surface hardness, but soften Explanation. NIL. the core. http://metals.about.com/library/bldef- Option B. retain core hardness, but soften Fatigue-Limit.htm the surface. Option C. significantly reduce the brittleness without suffering a major drop in its strength. Question Number. 32. A low carbon steel Correct Answer is. significantly reduce the would normally be case hardened using. brittleness without suffering a major drop in its strength. Option A. the nitriding process. Explanation. NIL. Option B. flame or induction hardening. Option C. pack or gas carburising. Correct Answer is. pack or gas carburising. Question Number. 36. High speed steel Explanation. NIL. relies heavily on the following metallic element for http://www.efunda.com/processes/heat_t its ability to cut other metals, even when it is reat/hardening/diffusion.cfm heated to a dull red colour. Option A. Tungsten. Page Option B. Nickel. DOWNLOAD OUR MOBILE APP FROM PLAY STORE @DGCA QUESTION PAPERS IF YOU HAVE PREVIOUS SESSION QUESTION PAPERS, SHARE WITH US AT [email protected]  WWW.EASAQUESTIONPAPERS.BLOGSPOT.COM PART -66 MODULE 6 PART -1 Visit to download all latest EASA / DGCA CAR 66 Module examination Question papers and study material Option C. Vanadium. Correct Answer is. Tungsten. Question Number. 41. Cast iron is. 6(www.dgcaquestionpapers.in), Like us on Facebook @ fb/DGCAQuestionPapers ( All CAR 66 Module Exam QP Available Explanation. NIL. Option A. tough. Option B. heavy and brittle. Question Number. 37. When a low Option C. very malleable. carbon steel bolt is stretched beyond its elastic Correct Answer is. heavy and brittle. limit without breaking, it will. Explanation. NIL. Option A. deform temporarily. Option B. become more ductile. Option C. deform permanently. Question Number. 42. Austenitic steel is Correct Answer is. deform permanently. produced when the material is heated to. Explanation. NIL. Option A. above the Upper Critical Point. Option B. above the Lower Critical Point. Question Number. 38. 1% Nickel, 1% Option C. below the Upper Critical Point. Carbon, steel is widely used for. Correct Answer is. above the Upper Critical Option A. exhaust valves. Point. Option B. ball and roller bearings. Explanation. NIL. Option C. high tensile steel bolts. Correct Answer is. ball and roller bearings. Explanation. NIL. Question Number. 43. Steel is produced by refining pig iron where air/oxygen is blown through the molten material to remove. Question Number. 39. Fatigue failure Option A. carbon. may be defined as. Option B. oxides. Option A. failure caused by stress in excess Option C. sulphur. of the material U.T.S. Correct Answer is. carbon. Option B. failure due to impact. Explanation. Air is to 'decarburise' the pig iron. Option C. reduction in strength due to http://www.bsu.edu/web/acmaassel/steel alternating loads..html Correct Answer is. reduction in strength due to alternating loads. Explanation. NIL. Question Number. 44. During a Rockwell Hardness test, what dimension is measured?. Question Number. 40. Normalising steels. Option A. The diameter of the indent. Option B. The depth of the indent. Option A. increases toughness. Option C. The diameter and depth of the Option B. increases the hardness. indent. Option C. relieves the stresses. Correct Answer is. The depth of the indent. Correct Answer is. relieves the stresses. Explanation. NIL. Page DOWNLOAD OUR MOBILE APP FROM PLAY STORE @DGCA QUESTION PAPERS IF YOU HAVE PREVIOUS SESSION QUESTION PAPERS, SHARE WITH US AT [email protected]  WWW.EASAQUESTIONPAPERS.BLOGSPOT.COM PART -66 MODULE 6 PART -1 Visit to download all latest EASA / DGCA CAR 66 Module examination Question papers and study material Explanation. NIL. Option A. the material is pulled to limit of http://www.qcplus.co.uk/training/training elasticity. 7(www.dgcaquestionpapers.in), Like us on Facebook @ fb/DGCAQuestionPapers ( All CAR 66 Module Exam QP Available -rockwell.htm Option B. the material is pulled to until it breaks. Option C. the material is pulled until it Question Number. 45. What does the 0 in reaches its UTS. 2024-T3 mean?. Correct Answer is. the material is pulled to Option A. The percentage of impurities in the until it breaks. alloy. Explanation. The material is tested to full Option B. The alloy has not been modified. destructions. Option C. The alloy has been modified. Correct Answer is. The alloy has not been Question Number. 2. Impact resistance modified. measures the. Explanation. NIL. Option A. material toughness. http://www.jjjtrain.com/vms/engineering_ Option B. material hardness. metal_stds.html#6 Option C. material ductility. Correct Answer is. material toughness. Explanation. Toughness' is resistance to impact. Question Number. 46. In most aircraft hydraulic systems, two-piece tube connectors consisting of a sleeve and a nut are used when a tubing flare is required. The use of this type of Question Number. 3. Specified time of connector eliminates. contact between the indentor and test piece in a Option A. the flaring operation prior to vickers or brinell hardness test is. assembly. Option A. 20 seconds. Option B. the possibility of reducing the flare Option B. 10 seconds. thickness by wiping or ironing during the Option C. 15 seconds. tightening process. Correct Answer is. 15 seconds. Option C. wrench damage to the tubing Explanation. CAIPs BL/10-3 5.2.8. during the tightening process. Correct Answer is. the possibility of reducing the flare thickness by wiping or ironing during the Question Number. 4. In an Izod impact tightening process. test the striking energy of the striker is Explanation. With the two-piece fitting (AN818) approximately. there is no relative motion between the fitting and Option A. 150 J. the flare when the nut is being tightened. Option B. 163 J. Option C. 300 J. 01b. Aircraft Materials - Ferrous. Correct Answer is. 163 J. Explanation. CAIPs BL/10-3 6.2. Question Number. 1. In the tensile strength test. Question Number. 5. The Charpy test Page measures. DOWNLOAD OUR MOBILE APP FROM PLAY STORE @DGCA QUESTION PAPERS IF YOU HAVE PREVIOUS SESSION QUESTION PAPERS, SHARE WITH US AT [email protected]  WWW.EASAQUESTIONPAPERS.BLOGSPOT.COM PART -66 MODULE 6 PART -1 Visit to download all latest EASA / DGCA CAR 66 Module examination Question papers and study material Option A. strain. Option C. Fatigue Testing. Option B. impact energy. Correct Answer is. Impact Resistance Test. 8(www.dgcaquestionpapers.in), Like us on Facebook @ fb/DGCAQuestionPapers ( All CAR 66 Module Exam QP Available Option C. Young's modulus. Explanation. NIL. http://www- Correct Answer is. impact energy. materials.eng.cam.ac.uk/mpsite/properties/non- Explanation. NIL. IE/toughness.html Question Number. 6. The 'Fatigue limit' Question Number. 10. Which of the for steel is generally in the region of, compared to folllowing are all hardness testing machines?. the static U.T.S. Option A. 40%-60%. Option A. Rockwell, Brinell and Izod. Option B. 60%-80%. Option B. Rockwell, Vickers and Izod. Option C. 20%-40%. Option C. Rockwell, Brinell and Vickers. Correct Answer is. 20%-40%. Correct Answer is. Rockwell, Brinell and Explanation. NIL. http://www.key-to- Vickers. steel.com/Articles/Art137.htm Explanation. Standard Aviation Maintenance Handbook Page 4-11. Question Number. 7. The ability of mild 02a. Aircraft Materials - Non-Ferrous. steel to accept more load after the yield point is reached is due to. Option A. necking. Question Number. 1. The most suitable Option B. strain hardening. mixture for a salt bath operation is. Option C. plasticisation. Option A. 20% nitrate of soda and 80% Correct Answer is. strain hardening. sodium nitrate. Explanation. NIL. Option B. 90% nitrate of soda and 10% sodium nitrate. Option C. 70% sodium chlorate and 30% Question Number. 8. What is a Rockwell sodium nitrate. tester used for?. Correct Answer is. 90% nitrate of soda and Option A. Hardness Testing. 10% sodium nitrate. Option B. Tensile Testing. Explanation. BL/9-1 12. Option C. Fatigue Testing. Correct Answer is. Hardness Testing. Explanation. NIL. Question Number. 2. How many times http://www.qcplus.co.uk/training/training can clad alloy be heat treated?. -rockwell.htm Option A. Once only. Option B. 3 times. Option C. as many times as required. Question Number. 9. What type of test Correct Answer is. 3 times. involves using a weighted pendulum to strike a Explanation. NIL. material until fracture?. Option A. Hardness Test. Page Option B. Impact Resistance Test. DOWNLOAD OUR MOBILE APP FROM PLAY STORE @DGCA QUESTION PAPERS IF YOU HAVE PREVIOUS SESSION QUESTION PAPERS, SHARE WITH US AT [email protected]  WWW.EASAQUESTIONPAPERS.BLOGSPOT.COM PART -66 MODULE 6 PART -1 Visit to download all latest EASA / DGCA CAR 66 Module examination Question papers and study material Question Number. 3. The symbol 'W' on Option C. oxidise and become stronger. a material indicates. Correct Answer is. oxidise and become 9(www.dgcaquestionpapers.in), Like us on Facebook @ fb/DGCAQuestionPapers ( All CAR 66 Module Exam QP Available Option A. it is for use on aircraft mainplanes electrically insulated. only. Explanation. Oxides of all metals are insulators. Option B. it has been solution treated and will respond effectively to precipitation treatment. Option C. it is for workshop use only. Question Number. 7. What care should Correct Answer is. it has been solution you take with 2024-T3?. treated and will respond effectively to Option A. Do not scratch or make nicks in it. precipitation treatment. Explanation. NIL. Option B. Do not bend at sharp angles. Option C. Do not remove the surface of the sheet metal. Question Number. 4. For a particular Correct Answer is. Do not scratch or make metal material, what conditions are best to nicks in it. minimise creep?. Explanation. 2024-T3 has a low fatigue Option A. Low stress, low temperature. resistance. Option B. Low stress, high temperature. Option C. High stress, low temperature. Correct Answer is. Low stress, low Question Number. 8. Composition of temperature. silver solder is. Explanation. NIL. Option A. tin and lead. Option B. tin, lead and silver. Option C. tin, lead, silver and antimony. Question Number. 5. What is the effect Correct Answer is. tin, lead, silver and of precipitation heat treatment on aluminium?. antimony. Explanation. BL/6-1 Table 3. Option A. It speeds up age hardening process. Option B. It delays the age hardening Question Number. 9. If aluminium alloy process. is not quenched within the minimum time allowed Option C. It softens the material to allow it after heat treatment is it will be. to be worked. Option A. subject to corrosion. Correct Answer is. It speeds up age hardening Option B. malleable. process. Option C. brittle. Explanation. NIL. Correct Answer is. brittle. Explanation. If al. alloy is not quenched, the copper precipitates and it remains hard and brittle. Question Number. 6. Aluminium exposed to air will. Option A. oxidise and become weaker. Option B. oxidise and become electrically Page insulated. DOWNLOAD OUR MOBILE APP FROM PLAY STORE @DGCA QUESTION PAPERS IF YOU HAVE PREVIOUS SESSION QUESTION PAPERS, SHARE WITH US AT [email protected]  WWW.EASAQUESTIONPAPERS.BLOGSPOT.COM PART -66 MODULE 6 PART -1 Visit to download all latest EASA / DGCA CAR 66 Module examination Question papers and study material Question Number. 10. Anodizing protects alloy metal from corrosion and does what else?. Question Number. 14. Precipitation 10(www.dgcaquestionpapers.in), Like us on Facebook @ fb/DGCAQuestionPapers ( All CAR 66 Module Exam QP Available treating makes the metal. Option A. Seals the surface from moisture. Option A. Precipitation treating makes the metal. Option B. Makes a good surface for paint to Option B. less strong and hard. adhere to. Option C. harder, stronger and less ductile. Option C. Makes the surface alkaline. Correct Answer is. Makes a good surface for Correct Answer is. harder, stronger and less paint to adhere to. ductile. Explanation. NIL. Explanation. NIL. Question Number. 11. If caustic soda Question Number. 15. A material has the turns a material black what is it?. code 2024-TH6 on it. Which part of the code Option A. Aluminium alloy. indicates the percentage of the alloying element?. Option B. Alclad. Option C. Aluminium. Option A. H. Correct Answer is. Aluminium alloy. Option B. 20. Explanation. Caustic soda turns al.alloy black, Option C. 6. and pure aluminium white. Correct Answer is. 20. Explanation. NIL. Question Number. 12. What chemical is used to identify aluminium alloys?. Question Number. 16. Aluminium alloyed Option A. Caustic soda. primarily with magnesium is numbered. Option B. Copper sulphate. Option A. 2025. Option C. Nitric acid. Option B. 5025. Correct Answer is. Caustic soda. Option C. 1025. Explanation. Caustic soda turns al.alloy black, Correct Answer is. 5025. and pure aluminium white. Explanation. NIL. Question Number. 13. Pure aluminium is. Question Number. 17. Heat treatment is shown on a British aluminium alloy by a. Option A. highly resistant to corrosion. Option B. not resistant to corrosion. Option A. letter and number code. Option C. reasonably resistant to corrosion. Option B. number code. Option C. letter code Correct Answer is. highly resistant to Correct Answer is. letter code corrosion. Explanation. BL/9-1 16.2. Explanation. Pure aluminium is highly resistant to corrosion. Page DOWNLOAD OUR MOBILE APP FROM PLAY STORE @DGCA QUESTION PAPERS IF YOU HAVE PREVIOUS SESSION QUESTION PAPERS, SHARE WITH US AT [email protected]  WWW.EASAQUESTIONPAPERS.BLOGSPOT.COM PART -66 MODULE 6 PART -1 Visit to download all latest EASA / DGCA CAR 66 Module examination Question papers and study material Question Number. 18. Non heat treatable Option C. a series of numbers. materials. Correct Answer is. a series of letters. 11(www.dgcaquestionpapers.in), Like us on Facebook @ fb/DGCAQuestionPapers ( All CAR 66 Module Exam QP Available Option A. cannot be hardened. Explanation. CAIP BL/9-1. Option B. can be hardened by strain hardening or cold working. Option C. can be hardened by annealing. Question Number. 22. In a sheet metal Correct Answer is. can be hardened by strain store the following is marked on a sheet of hardening or cold working. aluminium alloy: L162 (sheet 1). , On a different Explanation. All materials but a few (eg lead) sheet the following marking is found: L172 (sheet can be hardened by cold working. 2). The following is true: Option A. Sheet one has a shinier surface than sheet 2. Question Number. 19. Which of the Option B. Sheet one is more ductile than following metals is an aluminium silicon alloy used sheet 2. mainly for casting?. Option C. Sheet two is of a thicker gauge Option A. Alclad. than sheet 1. Option B. Aldrey. Correct Answer is. Sheet one is more ductile Option C. Alpax. than sheet 2. Correct Answer is. Alpax. Explanation. The L numbers are the British al. Explanation. Trade name for material used alloy specs. mainly for castings. Low density and corrosion resistance. 87 % Aluminium 13 % Silicon. http://www.glue-it.com/model- Question Number. 23. Cold working of a engineering/general- material is used to reduce. information/glossary/a_summ.htm Option A. material hardness. Option B. fatigue. Option C. wear of manufacturing tools. Question Number. 20. Aircraft skin is Correct Answer is. wear of manufacturing joggled to. tools. Option A. provide smooth airflow at faying Explanation. Cold working increases strength surfaces. and hardness (therefore reduces wear). Option B. make a frame lighter but stronger. Option C. conform to the aircraft contour. Question Number. 24. Sheet metal Correct Answer is. provide smooth airflow at should be stored. faying surfaces. Option A. above 25 degrees centigrade. Explanation. A joggle makes a flush surface at a Option B. on its edge in racks to prevent join. scratching. Option C. stacked flat to prevent bending of sheets. Question Number. 21. The British system Correct Answer is. on its edge in racks to of heat treatment codes is. prevent scratching. Option A. a series of letters. Explanation. CAAIPs Leaflet 1-8. Page Option B. numbers and letters. DOWNLOAD OUR MOBILE APP FROM PLAY STORE @DGCA QUESTION PAPERS IF YOU HAVE PREVIOUS SESSION QUESTION PAPERS, SHARE WITH US AT [email protected]  WWW.EASAQUESTIONPAPERS.BLOGSPOT.COM PART -66 MODULE 6 PART -1 Visit to download all latest EASA / DGCA CAR 66 Module examination Question papers and study material Correct Answer is. Corrosion resistant and Question Number. 25. Clad aluminium low expansion coefficient. 12(www.dgcaquestionpapers.in), Like us on Facebook @ fb/DGCAQuestionPapers ( All CAR 66 Module Exam QP Available alloy (alclad) has a pure aluminium coating of. Explanation. Nickel and chromium are the alloying elements in Stainless Steel. Option A. 0.002. Option B. 1% of alloy thickness. Option C. 5% of alloy thickness. Question Number. 29. Titanium alloys. Correct Answer is. 5% of alloy thickness. Explanation. The cladding is 5% each side. Option A. are cheap to manufacture. Option B. have a high strength to weight ratio. Option C. are corrosion resistant but heavy. Question Number. 26. The main metal in Correct Answer is. have a high strength to monel is. weight ratio. Option A. aluminium. Explanation. NIL. Option B. nickel. Option C. stainless steel. Correct Answer is. nickel. Question Number. 30. Which part of the Explanation. Monel is a nickel alloy. 2017-T36 aluminium alloy designation indicates the primary alloying agent used in its manufacture?. Question Number. 27. A tube complying Option A. 20. to BS T51 is. Option B. 2. Option A. tungum. Option C. 17. Option B. HTS tube. Correct Answer is. 2. Option C. high pressure seamless copper Explanation. NIL. tube. Correct Answer is. high pressure seamless copper tube. Question Number. 31. Clad aluminium Explanation. BL/6-15 3.2.1 or download alloys are used in aircraft because they. External document... page 28. Option A. are harder wearing than unclad http://www.dstan.mod.uk/data/05/069/0 aluminium alloys. 0000300.pdf Option B. are less subject to corrosion than uncoated aluminium alloys. Option C. are stronger than unclad Question Number. 28. Why is nickel aluminium alloys. chromium used in many exhaust systems?. Correct Answer is. are less subject to corrosion than uncoated aluminium alloys. Option A. Corrosion resistant and high heat Explanation. NIL. conductivity. Option B. Lightweight and flexible. Option C. Corrosion resistant and low Question Number. 32. Non heat treatable Page expansion coefficient. aluminium alloys. DOWNLOAD OUR MOBILE APP FROM PLAY STORE @DGCA QUESTION PAPERS IF YOU HAVE PREVIOUS SESSION QUESTION PAPERS, SHARE WITH US AT [email protected]  WWW.EASAQUESTIONPAPERS.BLOGSPOT.COM PART -66 MODULE 6 PART -1 Visit to download all latest EASA / DGCA CAR 66 Module examination Question papers and study material Option A. can be hardened by strain Question Number. 36. When buffing hardening. surface of Aluminium Alloy, what material are you 13(www.dgcaquestionpapers.in), Like us on Facebook @ fb/DGCAQuestionPapers ( All CAR 66 Module Exam QP Available Option B. cannot be softened. removing?. Option C. cannot be hardened. Option A. Oxide layer. Correct Answer is. can be hardened by strain Option B. Aluminium. hardening. Option C. Alloy. Explanation. NIL. Correct Answer is. Oxide layer. Explanation. Polishing al.alloy, pure al. or Alclad, you would be removing the oxide layer. Question Number. 33. Solution treatment after manufacturers have performed it once can be carried out a further. Question Number. 37. Why is clad alloy Option A. 1 time. preferred to pure Aluminium?. Option B. 2 times. Option A. Less brittle. Option C. 3 times. Option B. More ductile. Correct Answer is. 2 times. Option C. Tougher. Explanation. Solution treatment to Alclad can Correct Answer is. Tougher. be carried out only 3 times in total. CAIPs BL/9-1. Explanation. The important factor is that clad Rivets can be re-heat treated 3 times (so 4 times in aluminium alloy is 90% aluminium alloy. The fact total) BL/6-27 6.3. that it is clad is irrelevant. Question Number. 34. Following solution Question Number. 38. Why are treatment aluminium alloy can be placed into aluminium alloys used on aircraft, instead of pure service. aluminium?. Option A. after 5 days. Option A. Stronger. Option B. straight away. Option B