1. 2. 3. 4. S. 6. Low carbon steel contain a. 0.10 to 0.30 percent b 0.30 to O.SO percent c. O.SO to l .OS percent Medium carbon steel a. 0.1 O to 0.30 percent b. 0.30 to O.SO percent c. O.SO to l .OS percent High carbon steel contain carbon a) 0.1 O to 0.30 percent b) 0.30 to O.SO percent c) O.SO to 1.0S percent Sheet forms is used for secondary structural stressed structural parts a) Low carbon steel b) Medium carbon steel c) High carbon steel . increases the hardness. tensile strength, and elastic limit of steel without appreciably decreasing the ductility a) Nickel b) Chromium c) Stainless Type of steel has practically replaced carbon steel in the fabrication of fuselage tubing, engine mounts, landing gears, and other structural parts. a. Cr-vd b. Cr-mb c. Stainless steel 7. Al is vital to aviation because a) High strength to weight ratio b) Ease of fabrication c) Its light weight d) All the above Scanned by CamScanner 8. 9. 6xxx indicate a. Mg and SI b. Si and Cu c. Other element 7xxx indicate a) Zn b) Mg and Si e) Other element 1 O. . is used for making compressor disk, spacer rings, compressor blades and vanes. through bolts, turbine housing and lines, and miscellaneous hardware for turbine engine. a) Al b) Tl c) Cr-mb 11. Beryllium Cu physical properties can be Inc by a) Heat treatment b) Stress relieving c) Full annealìng 12. Muntz metal composed of a) 40% Cu and 60% zinc b) 60% Cu and 40% zinc c) 60% brass and 40% Cu 13. Alloy which content major percent of Ni a) Muntz metal b) Red Brass c) Monel 14. Cold water quenching a) 80 degree F b) 85 degree F c) 105 degree F 15. Heat treatment of ti includes a) Relief of stresses set up during cold forming or maching Scanned by CamScanner _I b) Annealing after hot working or cold working e) Thermal hardening to improve strength d) ALL 16. Second digit indicate specific alloy a) Modification b) Alloy type e) Original alloy 17. Casting produce metal flowing under the gravity a) Permanent casting b) Sand casting e) Both 18. If the carbon is added to Iron, in percentage ranging upto approx a) l.05% b) 1% c) 2% 19. Steel which is adaptable for welding * 20. 21. a) Molybdenum b) Cr-mb c) Cr-vd Which of them is frequently affected by corrosion a) lxxx b) 2xxx c) 3xxx d) 4xxx Formula of cementite a) Fe3 C b) C2 Fe e) C3 Fe d) Fe2 e 22. MTCS for quenching medium (High to low) a) Brine > Oil >Water> Air Scanned by CamScanner _J b} Water> Brine> Oil > Air e) Brine > Water > Oil > Air d} This is typical saying 23. Which of method is used to check hardness of the steel a) Spark test b} lzod e) Bending d} None of the above 24. 4XXX series major alloying element a) Cu b) SI e) Mg d} Si-Mg 25. Which Is used for structural member in the vicinity of compass a) Monal b) lnconnel e) K Monel 26. Cyaniding is a) Heat treatment process b) Case hardening e) Annealing 27. Pressing and hammer comes under a) Forging b) Swaging e) Rolling d} Extrusion 28. All alloy process a) SHT b} PHT e} Both 29. Fatigue test a. lzod And charpy 1 Scanned by CamScanner _J b. Rotating beam and cantilever c. None of the above 30. Izad and charpy test determine a) Fatigue test b) Impact test c) Hardnes 31. Rotating beam or rotating cantilever test a) Hardness b) Impact test c) Fatigue test 32. Radiography is non-destructive method of locating cracks by means of a) Alpha and beta ray b) Alpha, beta and gamma ray c) X - ray and gamma ray 33. Hardness tester uses for non ferrous material a) Rockwell b) Brinell c) Barcoal tester 34. Which method is used for hardness testing method a) Izad b) Rotaing Beam c) Vickers d) None of the above 35. What is the dia of the bail penetrator used in the Rockwell testing a) 1\16 inch b) 1\Binch c) 1\32inch 36. What is angle of square base pyramid used in Vickers test a) 120 degree b) 145 degree c) 136 degree 37. Fatigue limit is i Scanned by CamScanner _J a) 0.2 x ultimate b) 0.5 x ultimate c) 0.9 x ultimate 38. Bolts and bushing are fitted in aircraft structure a) Loosely b) Snugly c) Tightly 39. Rockwell tester is used for the a) Hard material b) Soft material c) Soft and Hard of all shapes 40. Cd plating carried at a) Low voltage not exceeding 12 volts b) High voltage not exceeding 12 volts c) Low voltage exceeding 12 volts 41. Thickness of the Cd plating deposit is dependent upon the a) Time b) Current density c) Both 42. Sherardizing Is done a) Cd 700 degree F b) Zinc 700 degree F c) Cd 1400 degree F d) Zinc oxide 700 degree F 43. Taper ration of wood grain Is a) 4:1 b) 12:1 c) 8:1 d) 21:1 44. Each sheet of thin wood is known as a) Plywood b) Veneer l Scanned by CamScanner e) Brich 45. Which of the following is all purpose glue in aircraft construction a) Caseìn Glue b) Blood Albumin Glue c) Alkaline 46. .. Phenolic Glue is the direction along the length of the fabric a) Warp b) Weft c) Ply 47 is used over fabric and under the rib stitching to prevent the stitching cord from cutting through the fabric a) Surface tape b) Reinforcing Tape e) Cello Tape 48. .. the suction on the upper surface of the wing from the fabric to the ribs which, in turn, carry loads Into main wing structure a) Sewing thread b) Rib lacing Cord e) Reinforcing Tape 49 is the finishing tape that Is doped over each rib to seam to cover the stitching a) Surface tape b) Reinforcing c) Linen thread 50. .. Tape used for cross-bracing a) Reinforcing Tape b) Rib Lacing Cord e) Surface Tape 51. .. ribs and for binding no. of process which increase the elasticity and strength and reduce the tackiness of rubber like material a) Calendering b) Vulcanizing e) Unvulcanizlng 52. Cannot be reformed a) Thermosetting Scanned by CamScanner _J b) Thermoplastic e) Both 53. Annealing of steel is a) Soft, ductile but does relieve stress and strain b) Soft, ductile, relieve stress only e) Soft, ductile, relieve strain only d) Soft, ductile, relieve stress and strain 54. Which has no softening effect upon heating a) Thermoplastic b) Thermosetting c) Synthetic Rubber 55. Which has low water absorption rate and good resistance and low temperature a) Natural rubber b) Butyl rubber e) Buna-S 56. Rubber used with phosphate ester hydraulic fluids (Skydrol), Siiicone fluids, gases, Ketones and acetones a) Natural rubber b) Butyl rubber e) Buna-S 57. A O-ring designate specifically for the use as a static Seal properly will not to the Job when Installed on the × a) Stationary b) Moving parts e) Both 58. Gasket can be used as an oll seal and between engine crankcase and accessories a) Asbestos b) Cork c) Cu 59. Running seal Is a) Packing b} Gasket c) O-ring Packing 60. MTCS about compostte I Scanned by CamScanner _J 61. a) High strength to weight ratto b) A+ lighter than metal e) C + rapid corrosion occur MTCS regarding meshing of gear a) Larger of the two Is referred as GEAR b) 1 + Smaller of the two is PINION e) 2 +·Either could be driver and the other driven member d) Larger one will be driver while smaller one Is pinion 62. MTCS compound gear train a) Two of the Intermediate gear mounted on the same shaft and rotating at the same speed b) 1 + Gear train requires at least 4 gear e) 1 + Gear train require at least 2 gear 63. MTCS Simple gear train a) Two gear mounted on the same shaft b) Two gear mounted on the separate shaft e) Two or more gear mounted on the separate shaft 64. MTCS a) Even no. of gear ln the train will cause the driven gear to rotate in a direction opposite to that driver gear. b) Odd no. of gear in the train will cause the driven gear to rotate ln a direction same to that driver gear. c) Bott, d) Only 1 is correct 65. MTCS addendum a) Is the portion of the tooth that subject above or outside pitch of circle b) Is the portion of the tooth that subject below or inside pitch of circle c) None of the above 66. MTCS Clearance a) Difference between addendum and dedendum b) Difference between whole depth and working depth e) Equal to twice of addendum 67. Purpose of the gear rack a) Change rotary motion into reciprocating motion b) Does not change rotary motion into reciprocating motion Scanned by CamScanner J e) Change reciprocating motion Into rotary 68. Which gear is one which the teeth are cut so that they radiate from apex of the cone and lie on the conical surface a) BEVEL gear b} SPUR gear c) HELICAL gear 69. Which gear are used to transmit motion from one shaft to another shaft at an angle to the first a) BEVEL gear b} SPUR gear c) HELICAL gear 70. What are miter gear 71. a) Name given to mating bevel gear b) 1 + Having same no. of teeth and pitch cone c) 2 + Having angle of 45 degree Which gear is one with teeth cut on a cylinder and at an angle with the axis of rotation of the gear body a) × b) c) BEVEL gear SPUR gear HELICAL gear 72. The parts of the surface if the thread which connect adjacent flanks at the top of the rigid a) Root b) Lead c) Crest 73. Top surface joining the sides of the thread a) Crest b) Lead e) Root 74. The distance a screw thread advance axially in one turn a) Lead b) Root e) Crest 75. .. ......... are used where strength is not deciding factor a) Screw b) Bolt Scanned by CamScanner _I e) L Rivets 76. ......... have no clearly defined grip length a) Screw b) Bolt e) Rivets 77. ln 1-inch dia size, the a) thread specifies 12 thread per Inch (1-12 inch) NF b) UNF c) UNC d) NC 78. MTCS a) ln 1-inch dia size, the UNF thread specifies 12 thread per inch (1-12 inch) b) A+ ln 1-inch dia size, the NF thread specifies 14 thread per inch (1-14 inch) c) B + both type of thread are designated by the number of times the incline rotates around a 1-inch length of the given dia 79. Corrosion ln alloy and carbon steel is indicated a) Red rust deposit and pitting b) Black pits or uniform reddish - brown surface e) White powdery 80. Corrosion resistant steel 81. *82. a) Red rust deposit and pitting b) Black pits or uniform reddish - brown surface c) White powdery Corroding action will take place if in contact with each other in presence of moisture a) 7075 and 3003 b) 6053 and 5052 c) 2117 and 2124 d) 6053 and 7075 (Mg & Zn) Forms of corrosion which occur in airframe structure a) Surface and fllltform b) Stress corrosion and intergranula e) Dissimilar metal corrosion and intergranular -¡ Scanned by CamScanner _I 83. Galvanic action takes palee a) lntergranular corrosion b) Surface corrosion c) Dissimilar corrosion 84. The attack penetrate Into the core of the material along the boundaries of the metal grain 85. a) Pitting corrosion b) lntergranular corrosion e) Stress corrosion False briniling is type of corrosion a) Stress corrosion b) Fretting corrosion e) Surface corrosion 86. Stress corrosion is due to combine effect a. Tensile stress and Improper cleaning b. Tensile stress and metal system c. tensile stress and corrosive environment 87. lntergranular corrosion Inspection method 102) a) b) e) d) 103) a) b) e) 104) a) Ultrasonic b) Eddy current e) Both Corrosion occur due to Climate Dust and oil Foreign material All the above Disassembly and inspection done in which type in corrosion Stress corrosion lntergranular corrosion Dissimilar metal corrosion Which tubing is used in for ventilating conduit and instrument lines a) b) e) 105) a) b) e) 106) a) b) 1100 2014 6061 Which rivet is used for non structural purpose ln aeroplane Solid shank Blind rivet Mild steel rivet Jo bolt is used Permanent part of assembly Not subjected to replacement or servicing 1 Scanned by CamScanner J c) d) 3 piece rivet All the above a) b) c) d) Spring is made up Plastic 1 + Metal 2 + Composite 3 + Elastomer a) b) c) Taper pin is used Used is shear load ln tie rod terminal For safe tying nut, bolt and screw a) b) c) Corrosion can be removed by Strip the area to be treated 1 + Remove corrosion 2 + Apply protective coating a) b) c) Ti disadvantage Ti is heavier than stainless steel High melting point Brittle on long expose of air 107) 108) 109) 11 O) 111) a) b) c) Lubrication of bearing To lubricate area of rubbing contact between rolling element Dissipate heat All the above d) Anodizing Is 10% 10% 4% 4% a) b) c) Which can be rotated by finger Wing nut Plane check nut Castellated nut 112) a) b) c) 113) 114) a) b) c) 115) a) ×b)c) and cage by weight and 4% phosphorus by volume by volume & 4% phosphorus by weight by weight & 10% phosphorus by volume by volume & 10% phosphorus by weight Which fastener is used where more strength is required Bolt Screw Rivet Clearance+ Addendum Deddendum Whole depth Pitch circle Which bolt Is Interchangeable 116) a) AN 3 and AN 73 b) c) 117) a) b) c) d) 118) a) b) c) AN 7 and AN 73 None ln bearing When direction of load is at right angle it is radial load and when the load is parallel to shaft it is axial load Radial load changed due to RPM changed and AOA ,manoeuvring Axial load change due to compressor and turbine All the above For removing abrasion scratch from al tubing Al brush + O brush Burnishing tool + emery paper Al brush & burnishing tool Scanned by CamScanner _I a) b) c) Whîch is spring is used for tension and compression load Leaf spring Helical compression and tension spring Torsion spring a) b) c) MTCS AN has ressesd AC has longer AC has coarser 119) 120) 121) a) b) c) 122) a) b) c) d) 123) a) b) c) d) 124) a) b) c) * 125) a) b) c) 126) a) b) c) 127) a) b) c) Which is non self locking nut Shear nut AN 350 Castellated nut AN 320 Wing nut-AN 310is done MTCS Self tapping screw not Intended to be removed after Installation Structure screw is used only after installation Drive screw is a nail and not a screw Self tapping screw can be substitute for structural screw Which are the following angle flaring is done 37 degree 35 degree 45 degree Both 1 and 2 Sealing application Bulbed cherrylock rivet Wire draw cherrylock rivet Huck mechanical locked rivet Nicopress Is related to Cables Hardness testing Corrosion process Which is formed by layer of flat spring Flat spring Spiral spring Leaf spring Recessed triangle Indicate Internal wrenching bolt Close tolerance bolt General purpose bolt 128) Carburizing occurred after heat treatment process for case harden which process known is a) Tempering b) Carburizlng c) Case Hardening 129) ln casting alloy A214 indicate a. Zinc improve its pouring qualities is Indicated by the letter A 130. b. Zinc improve its pouring qualities is indicated by the letter T c. Zinc improve its pouring qualities is indicated by the letter C Proof test air or instrument lines are tested a. Dry or oil free air -I Scanned by CamScanner J + Nitrogen b. 1 c. Hydraulic fluid 131. MTCS Flareless tube Installation a. Final tightening commence at the point where the nut just begins to bottom b. Use a wrench and turn the nut one-sixth turn c. Permissible to tighten the nut an additional one sixth turn × d. All the above 132. ln MS 21900 -4 D (MS flareless tube fitting) D indicate a. Al alloy b. Al c. 2017 rivet is used 133. Which of the following is used in hydraulic lines in area where routine disconnection are not required a. Swaged b. Cryofit c. Both 134. ln cryofìt sleeve mfg a. 3% smaller, frozen ln liquid nitrogen, expanded to 5% larger than the line b. 5% smaller. frozen in liquid nitrogen, contracted to 3% larger than the line c. 5% smaller. frozen in liquid nitrogen, expanded to 3% larger than the line 135. flared, flareless. or permanent type fitting may be used a. Low, medium pressure system b. ln all system regardless of the pressure c. Medium pressure 136. Advantage of double flare a·. Smoother and more concentric than single b. 1 + more resistant to shearing effect c. 1 + not resistant to shearing effect flare Scanned by CamScanner _J 137. Tubing made from 11 OO H14 or 3003 H 14 is used a. ×b. c. Low or negligible fluid pressure Low or medium pressure Medium pressure 138. ln number "AN3DD5A" indicate the number 5 a. 5/16 inch length of boit b. 5/8 Inch length of bolt c. 5/16 inch dia of bolt 139. The numberAN441 a. Round head rivet b. Flat head rivet c. Universal head rivet indicate the which type of rivet head 140. A triangle marking on the head of bolt identified a. AN standard bolt b. Close Tolerance Bolt c. MS bolt 141. Self locking nut are a. Boots self locking nut b. Stainless steel self locking nut c. Elastic stop nut d. All 142. Which washer is used in place which is subjected to vibration a. Special Washer b. Shakeproof washer c. Lock Washer 143. MTCS i Scanned by CamScanner _J a. Riveted coated with zinc chromate Is yellow b. Metal spray is silver gray c. Anodized has pearl gray d. All 144. The most common aircraft cable is a. 7x7 and 7x19 b. 7x1 and 7x18 c. 7x19and7x18 d. 7x18and7x14 145. Disadvantage of cable linkage is a. Not flexible b. Frequent adjustment of cable c. High weight 146. MTCS a. Taper pin are used to carry shear load b. Fiat head pin is used with rod terminals and secondary cable c. Roll pin is tubular shape and seated in the full length of tube d. All the above 147. Which determine the selection of wire in the electrical system a. Voltage drop b. Current carrying density c. Both 148. To avoid the magnetic interference around wire which is used a. Shielded wire b. Standard aircraft wire i Scanned by CamScanner c. None 149. MTCS control cable a. 3/32 Inch cu brass b. 1 /1 6 Inch cu brass c. 3/32 Inch stainless steel 150. MTCS a. 1 O gauge-blue b. 15 gauge-red c. 11 gauge-yellow d. All 151. Spring which has excellent resistance to corrosion a. Stainless steel b. Cr - Vd steel c. Cr - Mb steel 152. Size, Dia and material of spring Is selected for a. Load carrying capacity b. Corrosion resistance c. None Scanned by CamScanner