Module 6 Set-2

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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




#71. INCONEL is a alloy of…………

#72. Annealing process used in sheet and wire industries to restore ductility is

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