RESISTANCE WELDING MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS

RESISTANCE WELDING

MULTIPLE CHOICE QUESTIONS

(MCQ) WITH ANSWERS

MCQ clears the concept, clarity and level

  of understanding. Resistance welding

uses heat produced due to electric current

and pressure. There are five types of

resistance welding. These are resistance

spot, seam, projection, butt and flush butt

welding. Each is used for a different

application. These have certain advantages

over electric arc welding.

1.  Resistance welding is by

(a) Fission with pressure

(b) Fission without pressure

(c) Both (a) & (b)

(d) None

ANS: (d)

2. Resistance welding is by

(a) Fusion with pressure

(b) Fusion without pressure

(c)  Both (a) and (b)

(d) None

ANS: (a)

3.  Heat produced in resistance welding is

(a) External heat

(b) Internal heat

(c) Both external & internal heat

(d) None

ANS: (b)

4.  Heat produced in resistance welding for current ‘I’, Resistance ‘R’ and time ‘t’ is given by the equation

(a) I²R² t

(b) IR t

(c) I²R/t

(d) None

ANS: (d)

5.  Heat produced in resistance welding for current ‘I’, Resistance ‘R’ and time ‘t’ is given by the equation

(e)  I²R² t

(f)  IR t

(g) I²R t

(h) None

ANS: (c)

6.  Types of resistance welding are

(a) 2

(b) 4

(c) 6

(d) None

ANS: (b)

7.  Types of resistance welding are

(a) Spot & Seam

(b) Projection & Butt

(c)  Both (a) & (b)

(d) None

ANS: (c)

8.  Resistance spot welding is a

(a) Most recent

(b) Old process

(c) Oldest process

(d) None

ANS: (c)

9.  Resistance spot welding uses

(a) One electrode

(b) Three electrodes

(c)  Five electrodes

(d) None

ANS: (d)

10. Resistance spot welding uses

(a) 2 electrodes

(b) 4 electrodes

(c) 6 electrodes

(d) None

ANS: (a)

11. Resistance spot welding uses

(a) Steel electrodes

(b) Stainless steel electrodes

(c) Aluminum electrodes

(d) None

ANS: (d)

12.Resistance welding uses

(a) Cast iron electrodes

(b) Copper electrodes

(c)  Both (a) & (b)

(d) None

ANS: (b)

13. Copper electrodes in resistance welding are

(a)  Air cooled

(b)  Water cooled

(c)   Both air & water cooled

(d)  None

ANS: (b)

14. Resistance spot welding used to join two or more

(a) Thin sheets

(b) Pipes

(c)  Angle irons

(d) None

ANS: (a)

15. Spot welding uses

(a) No filler material

(b) Filler material

(c)  With or without filler material

(d) None

ANS: (a)

16. In spot welding, current passes through the

(a) Sheets being joined

(b) Copper electrodes

(c)  Both (a) & (b)

(d) None

ANS: (c)

17. In spot welding, heat is generated in the

(a) Sheets

(b) Electrodes

(c)  Both (a) & (b)

(d) None

ANS: (a)

18. The quantity of heat produced depends upon

(a) Resistance & thermal conductivity

(b) Time of passing current

(c)  Both (a) & (b)

(d) None

ANS: (c)

19. Materials easily spot welded with ease are

(a) Low carbon steels & stainless steels

(b) Copper and aluminum

(c)  Both (a) & (b)

(d) None

ANS: (a)

20. Industries using spot welding are

(a) Vehicle & electronics

(b) Pressure vessel

(c)  Both (a) & (b)

(d) None

ANS: (a)

21. Resistance seam welding is used to join two or more

(a) Similar metals

(b) Dissimilar metals

(c)  Both (a) & (b)

(d) None

ANS: (c)

22. Types of seam welding are

(a)  4

(b)  3

(c)   2

(d)  None

ANS: (c)

23. Types of seam welding are

(a)  Resistance seam welding

(b)  Friction seam welding

(c)   Both (a) & (b)

(d)  None

ANS: (c)

24. Seam welding is

(a) Intermittent

(b) Continuous

(c)  Both (a) & (b)

(d) None

ANS: (c)

25. In resistance seam welding, electrodes are

(a) Stationary

(b) Motor driven wheels

(c)  Both (a) & (b)

(d) None

ANS: (b)

26. In resistance seam welding, sheets being connected have

(a) Butt configuration

(b) Lap configuration

(c)  Both (a) & (b)

(d) None

ANS: (b)

27. The shape of electrodes in resistance seam welding is

(a)  Groove shaped wheels

(b)  Disc shaped wheels

(c)  Both (a) & (b)

(d) None

ANS: (b)

28. In resistance seam welding, the most important parameter to give a better quality welded seam is

(a) Quantity of current flow

(b) Welding speed

(c)  Both (a) & (b)

(d) None

ANS: (b)

29. Resistance seam welding can make a

(a) Single seam & a parallel seam

(b)  Single seam and a lateral seam

(c)   Both (a) & (b)

(d)  None

ANS: (a)

30. Resistance seam welding is suitable for extremely

(a) Thick sheets

(b) Thin sheets

(c)  Medium thickness sheets

(d) None

ANS: (b)

31. Resistance seam welding machinery is

(a)  Cheap

(b)  Costly

(c)   Medium cost

(d)  None

ANS: (b)

32. Resistance seam welding requires

(a) Unskilled labor

(b) Skilled labor

(c)  Both unskilled and skilled labor

(d) None

ANS: (b)

33. Resistance seam welding is suitable for

(a) Stainless steel, Nickel & magnesium alloys

(b) Copper, aluminum & their alloys

(c)  Both (a) & (b)

(d) None

ANS: (a)

34. Resistance seam welding use is in the manufacture of

(a) Structures

(b) Tanks

(c)  Pillars

(d) None

ANS: (b)

35. In Friction seam welding, heat is produced through

(a) Copper electrodes

(b) Steel electrodes

(c) Both (a) & (b)

(d) None

ANS: (d)

36. Friction seam welding uses a

(a) Consumable electrode

(b) Non-consumable electrode

(c)  Both (a) & (b)

(d) None

ANS: (a)

37. In friction seam welding, work pieces are joined in the

(a) Fusion state

(b) Solid state

(c)  Both (a) & (b)

(d) None

ANS: (b)

38. Materials joinable with ease in friction seam welding are

(a) Mild steel & stainless steel

(b) Copper & aluminum alloys

(c)  Both (a) & (b)

(d)  None

ANS: (c)

39. Materials not joinable with friction seam welding are

(a) Copper to aluminum, titanium to copper

(b) Aluminum to steel, Nickel to steel

(c)  Both (a) & (b)

(d) None

ANS: (c)

40. Electrodes used in projection welding are made of

(a) Copper

(b) Aluminum

(c)  Steel

(d) None

ANS: (a)

41. Projection welding uses

(a) Single projection on the work pieces

(b) Two projections on the work pieces

(c)  Multiple small projections on the work pieces

(d) None

ANS: (c)

42. In projection resistance welding, work pieces touch

(a) At the points of electrodes

(b) At the point of projections

(c)  Both (a) & (b)

(d) None

ANS: (b)

43. Number of projections welded at a time are

(a) Four to five

(b) Three to four

(c)  Two to three

(d) None

ANS: (c)

44. In projection welding, pressure and current used are

(a) Large

(b) Small

(c)  Both (a) & (b)

(d) None

ANS: (b)

45. Commonly used shapes of projections are

(a) Triangular, pentagonal and straight

(b) Circular, Dome type & elongated ridges

(c)  Both (a) & (b)

(d) None

ANS: (b)

46. Resistance butt welding is used to connect

(a) Work pieces of different cross section

(b) Work pieces of same cross section

(c)  Both (a) & (b)

(d) None

ANS: (b)

47. Resistance butt welding is done in

(a) One step

(b) Two steps

(c)  Three steps

(d) None

ANS: (a)

48. Resistance butt welding is in

(a) Solid state

(b) Fusion state

(c)  Both (a) & (b)

(d) None

ANS: (a)

49. Resistance butt welding is used to weld

(a) Thin sheets

(b) Thick sheets

(c)  Both thin & thick sheets

(d) None

ANS: (c)

50. Resistance butt welding requires

(a) Skilled personnel

(b) Unskilled personnel

(c)  Both (a) & (b)

(d) None

ANS: (b)

51. Resistance butt welding is a

(a) Slow process

(b) Fast process

(c)  Both (a) & (b)

(d) None

ANS: (b)

52. Resistance butt welding joins

(a) Similar materials

(b) Different materials

(c)  Both (a) & (b)

(d) None

ANS: (c)

53. Resistance butt welding process

(a) Pollutes the atmosphere

(b) Ecofriendly

(c)  Both (a) & (b)

(d) None

ANS: (b)

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