WELDED JOINTS MULTIPLE CHOICE QUESTIONS (MCQ) WITH ANSWERS
WELDED JOINTS
MULTIPLE CHOICE QUESTIONS
(MCQ) WITH ANSWERS
MCQ on Welded joints increase
knowledge tremendously. Welded joints
are permanent joints. Welded joints are used
in numerous applications.
Fig. Standard Welded Joints & Their Symbols
Fig. Welding Symbol
Fig. Representation of Welding Symbol
(i) Welding symbol placed below the body line represents welding on near side of arrow of welding symbol
(ii) Welding symbol placed above the body line represents welding on far side of arrow of welding symbol
(iii)Welding symbol placed above & below the body line represents welding on near and far sides of arrow of welding symbol
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Strength of a welded joint increases by radio graphing by
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10 %
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12%
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15%
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None
Ans: (ii)
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Welded joint strength increases due to annealing by
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6%
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10%
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14%
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None
Ans: (i)
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Why are butt welded joints longitudinal joints ?
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High strength requirements
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Low strength requirements
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Low as well as high strength requirements
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None
Ans: (i)
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Lap welded joints used in circumferential joints because of ?
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High strength requirements
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Low strength requirements
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Low as well as high strength requirements
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None
Ans: (ii)
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Longitudinal welded joint fails by
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Longitudinal stress
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Radial stress
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Hoop stress
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None
Ans: (iii)
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Circumferential welded joint fails by
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Longitudinal stress
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Radial stress
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Hoop stress
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None
Ans: (i)
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Single full fillet welded joint cannot be used for a plate thickness greater than
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1/8”
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2/8”
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3/8”
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None
Ans: (iii)
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Double full fillet welded joint cannot be used for a plate thickness greater than
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1/8”
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3/8”
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5/8”
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None
Ans: (iii)
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Out of the followings, which welded joint is more stronger
(i) Butt joint
(ii) Lap joint
(iii)Screwed joint
(iv) None
Ans: (i)
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In which case, molten metal is used to do welding?
(i) Groove type
(ii) spot type
(iii) Plug type
(iv) None
Ans: (iii)
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A weld symbol is necessary because of
(i) Aesthetic sense
(ii) Finishing
(iii) Manufacturing
(iv) None
Ans: (iii)
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Different parts of a weld symbol are
(i) Arrow, center line and back part
(ii) Arrow, body line and length
(iii) Arrow, body line and tail
(iv)None
Ans: (iii)
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Joint which does not fall under lap joint category
(i)Transverse fillet
(ii) Parallel fillet
(iii) Circular fillet
(iv) None
Ans: (iv)
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Choose which is not a lap joint?
(i) Single V
(ii) Double V
(iii) Single U
(iv) None
Ans: (iv)
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Quantity which is not a part of the weld symbol
(i)Length of welding
(ii) Weld is made in the welding shop
(iii) Welding is on both sides
(iv) Machine used in welding
Ans: (iv)
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Term which is not a part of the weld symbol
(i) Tail
(ii) Arrow
(iii) Temperature of welding
(iv) None
Ans: (iii)
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Quantity is not a part of the weld symbol
(i)Dark circle
(ii) Open circle
(iii) Angle of weld
(iv)Starting and stopping allowance for welding
Ans: (iv)
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Type of welded joint which do not exit
(i) Groove type
(ii) Spot type
(iii)Plug type
(iv) Surface type
Ans: (iv)
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Term which is not applicable to a welded joint
(i) Higher efficiency
(ii)Easy process
(iii) Faster process
(iv) None
Ans: (ii)
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One which is applicable to a welded joint
(i)Less rigidity
(ii) Heavy
(iii) Difficult process
(iv) None
Ans: (iv)
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Projection welding is
(i) Electric arc welding
(ii) Gas welding
(iii)Spot welding
(iv) None
Ans: (iv)
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Internal defects in a welded joint can be found by a process called
(i) Tension test
(ii) Visual inspection
(iii) Radio graphing
(iv) None
Ans: (iii)
24. Parallel fillet welds are under
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Shear and bending stresses
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Compressive and torsion shear stresses
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Tensile and compressive stresses
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None
Ans: (iv)
25.Butt welds are under
(i) Shear stress
(ii) Compressive stress
(iii) Tensile stress
(iv)None
Ans: (iii)
26. Area under tension in a single transverse fillet lap weld is
(i)0.707 tl
(ii) 0.807 tl
(iii) 400 tl
(iv)None
Ans: (i)
27. By overlapping the plates, which type of welded joint is made
(i) Fillet welded joint
(ii) Butt welded joint
(iii) Fillet-Butt welded joint
(iv) None
Ans: (i)
28. The name of the welded joint made by placing the plates edge to edge is
(i) Fillet welded joint
(ii) Butt welded joint
(iii) Fillet-Butt welded joint
(iv) None
Ans: (ii)
29.The advantage of a welded joint over a riveted joint is
(i) Introduce residual stresses
(ii) Requires highly skilled labor and supervision
(iii) Lighter in weight
(iv) None
Ans: (iii)
30.Transverse fillet welds are under
(i) Shear stress
(ii) Compressive stress
(iii) Tensile stress
(iv)None
Ans: (iii)
31. Transverse fillet welds are under
(i) Bending and shear stresses
(ii)Compressive and torsion shear stresses
(iii)Tensile and compressive stresses
(iv)None
Ans: (iv)
32. Parallel fillet welds are under
(i) Shear stress
(ii)Compressive stress
(iii)Tensile stress
(iv)None
Ans: (i)
33. Welded joint used in the longitudinal joint of a cylindrical pressure vessel is
(i) Butt joint
(ii) Lap joint
(iii)Screwed joint
(iv) None
Ans: (i)
34. Which welded joint used in the circumferential joint of a cylindrical pressure vessel is
(i) Butt joint
(ii) Lap joint
(iii)Screwed joint
(iv) None
Ans: (ii)
34. Efficiency of a welded joint with respect to a riveted joint is
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Smaller
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Equal
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Greater
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None
ANS: (c )
35. The welded structure with respect to riveted structure is
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Heavier
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Lighter
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Same
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None
ANS: (b)
36. The strength of a welded joint with respect to a riveted joint is
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Greater
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Smaller
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Equal
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None
ANS: (a)
37. Changes in a welded structure are
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Easier
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Difficult
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Easier & difficult
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None
ANS: (a)
38. Welded structures with respect to riveted joint is
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Weakened in tension
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Strengthened in tension
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No change in tension strength
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None
ANS: (c )
39. Welded joints are
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Hinged joint
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Rigid joint
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Freely supported joint
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None
ANS: (b)
40. Process of welding with respect to riveting takes
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More time
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Less time
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Same time
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None
ANS: (b)
41. Welded joints require
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Punching of holes
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Drilling of holes
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Punching & Drilling of holes
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None
ANS: (d)
42. Welded structures with to riveted structures for a certain load are
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Heavier
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Lighter
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Same weight
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None
ANS: (b)
43. Appearance of welded structures with respect to riveted structures is
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Smooth
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Rough
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Same
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None
ANS: (a)
44. Welding requires
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Non-skilled worker
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Skilled worker
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Any worker
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None
ANS: (b)
45. Heating and cooling in welding is
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Even
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Non-even
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Cannot say
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None
ANS:(b)
46. Inspection of welded joints with respect to riveted joints is
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Difficult
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Easier
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Cannot say
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None
ANS:(a)
47. Lap welded joints are
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Rectangular
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Square
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Triangular
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None
ANS: (c )
48. Length of throat of a fillet weld is
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0.505 x leg
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0.707x leg
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0.909x leg
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None
ANS: (b)
49. The angle of a fillet weld is
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600
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300
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900
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None
ANS: (d)
50. The angle of a fillet weld is
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200
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400
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450
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None
ANS: (c )
51. Fillet weld is a
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Square
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Rectangular
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Triangular
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None
ANS: (c )
52. Plug weld is
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Rectangular
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Square
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Triangular
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None
ANS: (d)
53. The angle of V-welded joint in a pressure vessel
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30 to 450
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40 to 550
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55 to 700
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None
ANS: (c )
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