Quiznetik

Fabrication Technology | Set 1

1. Which of the following joint have high corrosion resistance?

Correct : A. Welding joint

2. The metals having good weldability, in descending order are

Correct : A. cast steel, iron, carbonsteel, castiron

3. Which of the following is not included in weldability?

Correct : C. Strain relieving brittleness

4. On which of the following factor, does weldability not depend?

Correct : A. Boiling point

5. Which ofthe following is not away of correcting the metalwhich does not have good weldability properties?

Correct : D. Procedure of adding filler materials

6. Which of the following is an example of plastic welding?

Correct : C. Forge welding

7. Which of the following is an example of fusion welding?

Correct : A. Arc welding

8. Which ofthe followingwelding process is usedforweldingof sheetmetals in automobile and air craft industries?

Correct : D. Resistance welding

9. In which of the following process, heat is created by blacksmith fire

Correct : A. Forge welding

10. The voltage needed in resistance welding does not depend upon

Correct : D. Length of weld

11. In resistance welding, two electrodes are made of

Correct : B. Copper

12. Arc welding machine uses only D.C. supply.

Correct : B. False

13. The negative pole of the electrode burns away faster than the positive pole.

Correct : B. False

14. Which of the following is affected by weld contour?

Correct : A. Fatigue

15. Which of the following materials are not suited for cold welding?

Correct : B. Steel

16. Match the following 1. Seam welding 1.rods and pipes of uniform cross section 2. Butt welding 2. Welding satellite tips to tools 3. Percussion welding 3. ERWpipeswelding Which of the following is true?

Correct : B. 1-3, 2-1, 3-2

17. What is the capacity of an automatic welding machine?

Correct : D. 800 to 3000A

18. What is the capacity of a light manual welding machine?

Correct : C. 500 to700A

19. What is the efficiency of an A.C. welding transformer?

Correct : C. 0.8

20. What is the amount of electric energy required per kg in dc welding operation?

Correct : D. 6-10 kWh

21. During fabrication joining of two or more components are ___

Correct : C. Temporarily or permanently both

22. During fabrication which processes are included

Correct : D. All of the above

23. The Weldability of the metals in descending order

Correct : A. Iron, Steel, Cast iron, Low Alloy steel

24. The Weldability of the metals in Ascending order

Correct : C. Stainless Steel, Low Alloy Steel, Cast Iron, Steel

25. During the welding power require to produce arc to join the metals are

Correct : B. Low voltage high ampere

26. Out of them which of the power source used in welding

Correct : C. Both of them

27. Static type power sources include

Correct : C. Transformer, Rectifier

28. Rotating type power sources includes

Correct : D. Motor-driven generator, Engine-driven generator

29. Which type of plates cannot be welded in single pass

Correct : A. Thick plates

30. In power-sources Transformer can change polarity or not?

Correct : B. No

31. In arc welding voltage is dependent of _____

Correct : C. Both of them

32. The percentage of __ minutes duration during which the power source with necessary output can be used without causing any damage

Correct : B. 10

33. In power sources Current used is

Correct : A. 50-1000 Amp

34. Full form of OCV is

Correct : C. Open current voltage

35. Which type of Power source is Solid State

Correct : C. Special type

36. Which of power source is an engine-driven generator

Correct : B. Rotating type

37. Which of power source is Rectifier?

Correct : A. Static type

38. Full-Form of the MMAW is

Correct : A. Manual metal arc welding

39. The voltage needed in resistance welding does not depend upon

Correct : D. Length

40. Which type of process is also known as the fabrication process?

Correct : C. Joining

41. Arc length in arc welding should be equal to ___

Correct : B. Rod diameter

42. In welding symbol, if the symbol is above the baseline then the welding is to be done at

Correct : B. Other side of the arrow

43. Where the welding symbol is placed when the welding is to be done at the arrow side

Correct : A. Below the baseline

44. For the vertical position of the weld fillet and other symbols should saw in which side

Correct : B. Left

45. The full form of DFW is

Correct : C. Diffusion welding

46. Full form of FB is Welding process is

Correct : B. Furnace brazing

47. Full form of FRW in Welding process are

Correct : A. Friction Welding

48. Ground Connection equipment is used for ______ welding

Correct : B. Arc Welding

49. In Edge preparation selection of joint is based on the following factors

Correct : D. All of them

50. During edge preparation bevel angle is

Correct : C. 40º

51. The gap between two plates to be joined with a view to obtain full penetration are

Correct : B. 3 to 5 mm

52. For plates of thickness more than 16 mm which weld is used

Correct : D. Double U butt Weld

53. For plates of thickness 3-5 mm which weld is used

Correct : A. Square butt weld

54. The shape of slots made during edge preparation is based on

Correct : D. All of the above

55. For 0.5 to 15 mm thick plates are welded using

Correct : A. Single-V & Single-U edges

56. In welding using Single-V and Single-U edge beveling angle is of

Correct : C. 60º to 80º

57. In flat or down hand position the weld bed is

Correct : A. Horizontal axis

58. During the horizontal position of the weld, the slope would be up to

Correct : B. 10º

59. During the over-head position of the weld slope would be

Correct : C. 0º-45º

60. During the Inclined position of the weld Rotation between

Correct : D. 0º-90º

61. In the welding position, an angle between the line bisecting the weld crosssection and vertical plane passing through the weld root is known as

Correct : B. Rotation

62. In the welding position, an angle between weld root line and horizontal reference plane is known as

Correct : A. Slope

63. Choose the color of acetylene cylinder

Correct : A. Maroon

64. Choose the color of oxygen cylinder

Correct : C. Black

65. In oxy-acetylene gas welding heat is obtained by

Correct : B. Gas Flame

66. Which type of weld is used lying in the same plane

Correct : A. Butt Joint

67. Which type of butt joint is used to joint 9 mm to 13 mm thick plate

Correct : A. Single-V or Single-U butt joint

68. In butt joint, which of the edge preparation is costlier

Correct : B. U-Shape

69. In lap joint thickness of the sheets is up to

Correct : A. 3 mm

70. When two plates are to be joined by keeping their surface at about 90º to one-another

Correct : C. Tee Joint

71. Full of the WPS is

Correct : A. Welding Procedure Specification

72. Inwhichwelding the surfacesoftwo components are subjected to static normalforce and oscillating shear stress?

Correct : D. Ultrasonic welding

73. Electron beam welding is carried out in?

Correct : C. Vacuum

74. Laser beam weldingis a joining process.

Correct : B. fusion

75. Which of the following is used to direct laser beam?

Correct : C. flat optical elements

76. Inert gas shielding is generally employed to protect _____

Correct : B. molten puddle of metal

77. The lasing material or crystal is excited by _____

Correct : B. krypton lamps

78. Which ofthe following does not holdtrue aboutlaserbeamwelding?

Correct : A. Laser welding cannot be used in case ofjoints atintricate locations

79. Laser welds are not influenced by _____

Correct : B. magnetic field

80. Which of the following material properties has no effect on laser beam machining?

Correct : D. Electrical conductivity

81. In oxy-acetylene welding colour of oxygen cylinder is

Correct : C. Black

82. In oxy-acetylene welding colour of oxygen cylinder is

Correct : B. Maroon

83. In arc welding, arc initiation voltage is of the order

Correct : B. 60-100V

84. In arc welding, the three elements to be controlled to obtain satisfactory welding operation are

Correct : A. Current, voltage and speed of travel

85. Which welding process is used to join two thick plates in one single pass?

Correct : D. Electroslag welding

86. The followingwelding process is usedtoweldfastener to plateswithout drillingorpunching holes?

Correct : D. Stud welding

87. The process which employ an exothermal chemical reaction to develop high temperature

Correct : C. Thermit welding

88. Which process allows fusion welds of great depth with minimum width?

Correct : A. Electron beam welding

89. The process of carbon arc welding is not used for which of the following material?

Correct : D. Iron

90. The distance from the center of arc to the tip of electrode is called what?

Correct : B. Arc length

91. What is the length of the arc generally?

Correct : C. 3mm – 4mm

92. With an increase in the heatinput of arcwelding method, how does it affectthewelding speed?

Correct : B. Decreases

93. With an increase in the heatinput of arc welding method, how does it affectthe required current?

Correct : A. Increases

94. Junction between two work piece and weld face is known as?

Correct : A. Throat

95. Portion at which two work piece are at the nearest distance is called as?

Correct : C. Root

96. Which of the following defects occur due to flux employed and electrode coating?

Correct : A. Inclusion of slay

97. Which ofthe following defectsoccurwhen thedeposited metal are notfocused atthe root of weld?

Correct : B. Inadequate penetration

98. Which of the following defects occur when weld metal layer fail to fuse together?

Correct : C. Incomplete fusion

99. Which ofthe following defects occur due to the entrapment of gas bubbles by the freezing dendrites during the cooling of molten pad?

Correct : D. Porosity

100. Which of the following defects occur due to melting or burning away of base metal?

Correct : A. Under cut