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#1. As a general rule, a soaking period of ………….. to …………is sufficient for the average heat-treating operation.
#2. Presence of Sulphur in Iron makes it :
#3. Which type of fitting is used in plumbing
#4. As the temperature increases colour of steel changes from dull red to a variety of colours and finally to…………..
#5. INCONEL has strength greater than ……..percent of Nickel.
#6. To relieve strain and reduce brittleness steel is ………. after being hardened.
#7. .Which gear is one which the teeth are cut so that they radiate from apex of the cone and lie on the conical surface
#8. Running seal is
#9. Sheet forms is used for secondary structural stressed structural parts
#10. The 6000 series contains
#11. When the alloy become too hard for further forming it have to be re-heat treated or …………
#12. Which type of plastics harden upto heating, and reheating has no softening effect
#13. Lead baths can be used in the temperature range of……………….
#14. In hot working metal is heated ………… and rolled into various shapes.
#15. After heat treatment tempering is done to
#16. The Belleville spring are used in
#17. The distance a screw thread advance axially in one turn
#18. …………is used for making compressor disk, spacer rings, compressor blades and vanes, through bolts, turbine housing and lines, and miscellaneous hardware for turbine engine.
#19. MTCS about Microbiological corrosion
#20. SAE 1010 to 1030 is a ………….. carbon steel.
#21. A salt bath heating range is…………….
#22. Which has low water absorption rate and good resistance and low temperature
#23. The portion of tooth space that is cut below the pitch circle is equal to addendum plus clearance ?
#24. Corrosion on ferrous metals is chemically removed by caustic and non-caustic chemicals depending upon:-
#25. ………percent of copper may be present as incidental elements in alloy steels.
#26. Four- Numerical series is used to designate the
#27. . ………. Welds readily and has working qualities quite similar to those of corrosion resistance steels.
#28. Nitriding is used for
#29. ………have no clearly defined grip length
#30. Which of the following is easily removable
#31. Surface oxidation of steel or cast iron is often known as …………
#32. Hardest structure of metals
#33. Which type of the corrosion penetrates to the core
#34. MTCS Clearance
#35. …………are shaped or formed by pressing or hammering heated metal in dies.
#36. If the finished forged surface is concave……..
#37. Al is vital to aviation because
#38. Diametric pitch of gear is ? shop theory
#39. When a piece of metal is cut, the material is subjected, as it comes in contact with the cutting edge, to a force known as…………
#40. MTCS about Glue
#41. In Chrome-vanadium steel, the percentage of chromium and vanadium are…….
#42. The extra flexible control cables are used in
#43. Nickel steel causes the spark stream
#44. Tempered condition refers to the condition of metal or metal alloys with respect to …………. Or ………..
#45. Mark the correct statement:- (DGCA Paper-2 Exam)
#46. In annealing greater softening can be achieved if
#47. Stainless steel expands about………..percent more than mild steel.
#48. The ………….. strength of material is it’s resistance to twisting.
#49. The size of gear is determined by
#50. Beryllium Cu physical properties can be inc by
#51. The temperature of heat-treating furnace is measured by………….
#52. To produce maximum softness the metal must be cooled ………..
#53. Recessed triangle on head surface
#54. Strength of chrome vanadium stell can be increased by ? 9A 5-69 0R 5-4
#55. MTCS
#56. . ………… furnaces require air for proper combustion and an air compressor or blower is therefore necessary.
#57. When a section dimensions are 6” X 6” or larger & approx. square is called……
#58. Chromium in Stainless Steel makes it:
#59. Furnaces operating at temperature of about 2500 degree F usually employ resister bar of ………………….
#60. A O-ring designate specifically for the use as a static Seal properly will not to the job when installed on the
#61. Bearing which takes radial loads
#62. What are miter gear
#63. The thermocouple which can be used upto 2800 deg. F, is made of ………. & ………..
#64. Fairleads should never deflect the ailment of cable more than _____from straight line
#65. One of the distinctive features of 18-8 steel is that…………… . .
#66. muntz metal composed of ___________
#67. . …………steel has replaced carbon steel in fabrication of structural parts.
#68. Nickel increase ……….. & ………. When combined with carbon steel.
#69. Balls and rollers of anti-friction bearings are generally made of ….
#70. Steel with less than 0.85 C is called