McqMate
Chapters
1. |
Which of the following joint have high corrosion resistance? |
A. | Welding joint |
B. | Riveted joint |
C. | Bolted joint |
D. | None of the above |
Answer» A. Welding joint |
2. |
The metals having good weldability, in descending order are |
A. | cast steel, iron, carbonsteel, castiron |
B. | carbon steel, iron, cast steel, castiron |
C. | iron, carbonsteel, cast steel, castiron |
D. | castiron, iron, carbon steel, cast steel |
Answer» A. cast steel, iron, carbonsteel, castiron |
3. |
Which of the following is not included in weldability? |
A. | Ability of mechanical soundness |
B. | Serviceability of joint |
C. | Strain relieving brittleness |
D. | Metallurgical compatibility of metal |
Answer» C. Strain relieving brittleness |
4. |
On which of the following factor, does weldability not depend? |
A. | Boiling point |
B. | Melting point |
C. | Thermal expansion |
D. | Thermal conductivity |
Answer» A. Boiling point |
5. |
Which ofthe following is not away of correcting the metalwhich does not have good weldability properties? |
A. | Procedure of welding |
B. | Provision of fluxing material |
C. | Provision of filler material |
D. | Procedure of adding filler materials |
Answer» D. Procedure of adding filler materials |
6. |
Which of the following is an example of plastic welding? |
A. | Gas welding |
B. | Arc welding |
C. | Forge welding |
D. | Thermit welding |
Answer» C. Forge welding |
7. |
Which of the following is an example of fusion welding? |
A. | Arc welding |
B. | Forge welding |
C. | Resistance welding |
D. | Thermit welding with pressure |
Answer» A. Arc welding |
8. |
Which ofthe followingwelding process is usedforweldingof sheetmetals in automobile and air craft industries? |
A. | Shield metal arc welding |
B. | Gas tungsten arc welding |
C. | Thermit welding |
D. | Resistance welding |
Answer» D. Resistance welding |
9. |
In which of the following process, heat is created by blacksmith fire |
A. | Forge welding |
B. | Spot welding |
C. | Projection welding |
D. | Seam welding |
Answer» A. Forge welding |
10. |
The voltage needed in resistance welding does not depend upon |
A. | Composition |
B. | Area |
C. | Thickness of weld |
D. | Length of weld |
Answer» D. Length of weld |
11. |
In resistance welding, two electrodes are made of |
A. | Aluminium |
B. | Copper |
C. | Iron |
D. | Bronze |
Answer» B. Copper |
12. |
Arc welding machine uses only D.C. supply. |
A. | True |
B. | False |
C. | all |
D. | none |
Answer» B. False |
13. |
The negative pole of the electrode burns away faster than the positive pole. |
A. | True |
B. | False |
C. | all |
D. | none |
Answer» B. False |
14. |
Which of the following is affected by weld contour? |
A. | Fatigue |
B. | Creep |
C. | Highpressureproperty |
D. | Lowpressureproperty |
Answer» A. Fatigue |
15. |
Which of the following materials are not suited for cold welding? |
A. | Brass |
B. | Steel |
C. | Silver |
D. | Gold |
Answer» B. Steel |
16. |
Match the following
|
A. | 1-3, 2-2, 3-1 |
B. | 1-3, 2-1, 3-2 |
C. | 1-2, 2-3, 3-1 |
D. | 1-2, 2-1,3-3 |
Answer» B. 1-3, 2-1, 3-2 |
17. |
What is the capacity of an automatic welding machine? |
A. | 100 to200A |
B. | 300 to 400A |
C. | 500 to700A |
D. | 800 to 3000A |
Answer» D. 800 to 3000A |
18. |
What is the capacity of a light manual welding machine? |
A. | 100 to200A |
B. | 300 to 400A |
C. | 500 to700A |
D. | 60 amp to 500 amp |
Answer» C. 500 to700A |
19. |
What is the efficiency of an A.C. welding transformer? |
A. | 0.6 |
B. | 0.7 |
C. | 0.8 |
D. | 0.9 |
Answer» C. 0.8 |
20. |
What is the amount of electric energy required per kg in dc welding operation? |
A. | 1-4 kWh |
B. | 3-7 kWh |
C. | 4-9 kWh |
D. | 6-10 kWh |
Answer» D. 6-10 kWh |
21. |
During fabrication joining of two or more components are ___ |
A. | Temporarily |
B. | Permanently |
C. | Temporarily or permanently both |
D. | None of the above |
Answer» C. Temporarily or permanently both |
22. |
During fabrication which processes are included |
A. | Welding |
B. | Brazing |
C. | Soldering |
D. | All of the above |
Answer» D. All of the above |
23. |
The Weldability of the metals in descending order |
A. | Iron, Steel, Cast iron, Low Alloy steel |
B. | Steel, Cast iron, Iron, Low Alloy steel |
C. | Iron, Cast iron, steel, low Alloy steel |
D. | Steel, Iron, Cast iron, Low Alloy steel |
Answer» A. Iron, Steel, Cast iron, Low Alloy steel |
24. |
The Weldability of the metals in Ascending order |
A. | Low Alloy Steel, Stainless Steel, Cast Iron, Steel |
B. | Low Alloy Steel, Cast Iron, Steel, Stainless Steel |
C. | Stainless Steel, Low Alloy Steel, Cast Iron, Steel |
D. | Stainless Steel, Low Alloy Steel, Steel, Cast Iron |
Answer» C. Stainless Steel, Low Alloy Steel, Cast Iron, Steel |
25. |
During the welding power require to produce arc to join the metals are |
A. | Low voltage low ampere |
B. | Low voltage high ampere |
C. | High voltage low ampere |
D. | High voltage high ampere |
Answer» B. Low voltage high ampere |
26. |
Out of them which of the power source used in welding |
A. | Bilopar welding generator, |
B. | Multi operator D.C. welding sets |
C. | Both of them |
D. | None of them |
Answer» C. Both of them |
27. |
Static type power sources include |
A. | Transformer, Motor-driven generator |
B. | Rectifier, Engine-driven Generator |
C. | Transformer, Rectifier |
D. | Motor-driven generator, Engine-driven generator |
Answer» C. Transformer, Rectifier |
28. |
Rotating type power sources includes |
A. | Transformer, Motor-driven generator |
B. | Rectifier, Engine-driven Generator |
C. | Transformer, Rectifier |
D. | Motor-driven generator, Engine-driven generator |
Answer» D. Motor-driven generator, Engine-driven generator |
29. |
Which type of plates cannot be welded in single pass |
A. | Thick plates |
B. | Thin Plates |
C. | all |
D. | none |
Answer» A. Thick plates |
30. |
In power-sources Transformer can change polarity or not? |
A. | Yes |
B. | No |
C. | all |
D. | none |
Answer» B. No |
31. |
In arc welding voltage is dependent of _____ |
A. | Arc length |
B. | Arc gap |
C. | Both of them |
D. | None of them |
Answer» 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 |
A. | 5 |
B. | 10 |
C. | 50 |
D. | 60 |
Answer» B. 10 |
33. |
In power sources Current used is |
A. | 50-1000 Amp |
B. | 500-1000 Amp |
C. | 100-500 Amp |
D. | 50-200 Amp |
Answer» A. 50-1000 Amp |
34. |
Full form of OCV is |
A. | Output current voltage |
B. | Open command voltage |
C. | Open current voltage |
D. | Output command voltage |
Answer» C. Open current voltage |
35. |
Which type of Power source is Solid State |
A. | Static type |
B. | Rotating type |
C. | Special type |
D. | None of them |
Answer» C. Special type |
36. |
Which of power source is an engine-driven generator |
A. | Static type |
B. | Rotating type |
C. | Special type |
D. | None of them |
Answer» B. Rotating type |
37. |
Which of power source is Rectifier? |
A. | Static type |
B. | Rotating type |
C. | Special type |
D. | None of them |
Answer» A. Static type |
38. |
Full-Form of the MMAW is |
A. | Manual metal arc welding |
B. | Molted metal arc welding |
C. | Mix Metal arc welding |
D. | Metal arc welding |
Answer» A. Manual metal arc welding |
39. |
The voltage needed in resistance welding does not depend upon |
A. | Composition |
B. | Area |
C. | Thickness |
D. | Length |
Answer» D. Length |
40. |
Which type of process is also known as the fabrication process? |
A. | Casting |
B. | Forming |
C. | Joining |
D. | None of them |
Answer» C. Joining |
41. |
Arc length in arc welding should be equal to ___ |
A. | Half the diameter of the electrode rod |
B. | Rod diameter |
C. | Twice the rod diameter |
D. | None of the above |
Answer» B. Rod diameter |
42. |
In welding symbol, if the symbol is above the baseline then the welding is to be done at |
A. | The arrow side |
B. | Other side of the arrow |
C. | Right side of the arrow |
D. | Both side of the arrow |
Answer» B. Other side of the arrow |
43. |
Where the welding symbol is placed when the welding is to be done at the arrow side |
A. | Below the baseline |
B. | Above the baseline |
C. | A & B both |
D. | None of them |
Answer» A. Below the baseline |
44. |
For the vertical position of the weld fillet and other symbols should saw in which side |
A. | Right |
B. | Left |
C. | Bottom |
D. | Above |
Answer» B. Left |
45. |
The full form of DFW is |
A. | Direct finish weld |
B. | Direct fusion welding |
C. | Diffusion welding |
D. | Double fusion Welding |
Answer» C. Diffusion welding |
46. |
Full form of FB is Welding process is |
A. | Friction brazing |
B. | Furnace brazing |
C. | Function brazing |
D. | Finish brazing |
Answer» B. Furnace brazing |
47. |
Full form of FRW in Welding process are |
A. | Friction Welding |
B. | Furnace Welding |
C. | Fusion Reaction welding |
D. | None of them |
Answer» A. Friction Welding |
48. |
Ground Connection equipment is used for ______ welding |
A. | Gas welding |
B. | Arc Welding |
C. | all |
D. | none |
Answer» B. Arc Welding |
49. |
In Edge preparation selection of joint is based on the following factors |
A. | Effect of warping |
B. | Cost of designing of the product |
C. | Characteristics of the product |
D. | All of them |
Answer» D. All of them |
50. |
During edge preparation bevel angle is |
A. | 15º |
B. | 30º |
C. | 40º |
D. | 60º |
Answer» C. 40º |
51. |
The gap between two plates to be joined with a view to obtain full penetration are |
A. | 1 to 3 mm |
B. | 3 to 5 mm |
C. | 5 to 8 mm |
D. | 5 to 10 mm |
Answer» B. 3 to 5 mm |
52. |
For plates of thickness more than 16 mm which weld is used |
A. | Square butt weld |
B. | Single V butt weld |
C. | Double V butt Weld |
D. | Double U butt Weld |
Answer» D. Double U butt Weld |
53. |
For plates of thickness 3-5 mm which weld is used |
A. | Square butt weld |
B. | Single V butt weld |
C. | Double V butt Weld |
D. | Double U butt Weld |
Answer» A. Square butt weld |
54. |
The shape of slots made during edge preparation is based on |
A. | Joint design |
B. | Thickness of material |
C. | Joint strength required |
D. | All of the above |
Answer» D. All of the above |
55. |
For 0.5 to 15 mm thick plates are welded using |
A. | Single-V & Single-U edges |
B. | Double-V Edges |
C. | Double-V & Double-U edge |
D. | Square face edge |
Answer» A. Single-V & Single-U edges |
56. |
In welding using Single-V and Single-U edge beveling angle is of |
A. | 15º to 30º |
B. | 30º to 60º |
C. | 60º to 80º |
D. | 5º to 15º |
Answer» C. 60º to 80º |
57. |
In flat or down hand position the weld bed is |
A. | Horizontal axis |
B. | Vertical Axis |
C. | all |
D. | none |
Answer» A. Horizontal axis |
58. |
During the horizontal position of the weld, the slope would be up to |
A. | 5º |
B. | 10º |
C. | 3º |
D. | 8º |
Answer» B. 10º |
59. |
During the over-head position of the weld slope would be |
A. | 0º-15º |
B. | 0º-30º |
C. | 0º-45º |
D. | 0º-90º |
Answer» C. 0º-45º |
60. |
During the Inclined position of the weld Rotation between |
A. | 0º-15º |
B. | 0º-30º |
C. | 0º-45º |
D. | 0º-90º |
Answer» 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 |
A. | Slope |
B. | Rotation |
C. | all |
D. | none |
Answer» B. Rotation |
62. |
In the welding position, an angle between weld root line and horizontal reference plane is known as |
A. | Slope |
B. | Rotation |
C. | all |
D. | none |
Answer» A. Slope |
63. |
Choose the color of acetylene cylinder |
A. | Maroon |
B. | Yellow |
C. | Black |
D. | Red |
Answer» A. Maroon |
64. |
Choose the color of oxygen cylinder |
A. | Maroon |
B. | Yellow |
C. | Black |
D. | Red |
Answer» C. Black |
65. |
In oxy-acetylene gas welding heat is obtained by |
A. | An electric ac |
B. | Gas Flame |
C. | Chemical |
D. | None of these |
Answer» B. Gas Flame |
66. |
Which type of weld is used lying in the same plane |
A. | Butt Joint |
B. | Edge Joint |
C. | Lap Joint |
D. | Corner Joint |
Answer» A. Butt Joint |
67. |
Which type of butt joint is used to joint 9 mm to 13 mm thick plate |
A. | Single-V or Single-U butt joint |
B. | Double-V or double-U butt joint |
C. | all |
D. | none |
Answer» A. Single-V or Single-U butt joint |
68. |
In butt joint, which of the edge preparation is costlier |
A. | V- shape |
B. | U-Shape |
C. | all |
D. | none |
Answer» B. U-Shape |
69. |
In lap joint thickness of the sheets is up to |
A. | 3 mm |
B. | 4 mm |
C. | 10 mm |
D. | 15 mm |
Answer» A. 3 mm |
70. |
When two plates are to be joined by keeping their surface at about 90º to one-another |
A. | Lap joint |
B. | Butt Joint |
C. | Tee Joint |
D. | Corner Joint |
Answer» C. Tee Joint |
71. |
Full of the WPS is |
A. | Welding Procedure Specification |
B. | Welding Process System |
C. | Welding Process Specification |
D. | Welding Procedure System |
Answer» A. Welding Procedure Specification |
72. |
Inwhichwelding the surfacesoftwo components are subjected to static normalforce and oscillating shear stress? |
A. | Diffusion welding |
B. | Thermit welding |
C. | Laser beam welding |
D. | Ultrasonic welding |
Answer» D. Ultrasonic welding |
73. |
Electron beam welding is carried out in? |
A. | Inert atmosphere |
B. | Partially filled chamber |
C. | Vacuum |
D. | Partially vacuum |
Answer» C. Vacuum |
74. |
Laser beam weldingis a joining process. |
A. | fission |
B. | fusion |
C. | coherent |
D. | plastic |
Answer» B. fusion |
75. |
Which of the following is used to direct laser beam? |
A. | glass apertures |
B. | perforated glass sheets |
C. | flat optical elements |
D. | electro-magnetic coils |
Answer» C. flat optical elements |
76. |
Inert gas shielding is generally employed to protect _____ |
A. | laser beam |
B. | molten puddle of metal |
C. | filler electrode |
D. | lenses |
Answer» B. molten puddle of metal |
77. |
The lasing material or crystal is excited by _____ |
A. | neon lamps |
B. | krypton lamps |
C. | tungsten wire laps |
D. | CFLs |
Answer» B. krypton lamps |
78. |
Which ofthe following does not holdtrue aboutlaserbeamwelding? |
A. | Laser welding cannot be used in case ofjoints atintricate locations |
B. | It can produce tiny welds |
C. | Laser welding can be used for avariety of metal combinations |
D. | In case of LBW, thin welds on small diameter wires are less susceptible to burn back |
Answer» A. Laser welding cannot be used in case ofjoints atintricate locations |
79. |
Laser welds are not influenced by _____ |
A. | electric field |
B. | magnetic field |
C. | radio waves |
D. | ultraviolet rays |
Answer» B. magnetic field |
80. |
Which of the following material properties has no effect on laser beam machining? |
A. | Reflectivity |
B. | Thermal conductivity |
C. | Weldability |
D. | Electrical conductivity |
Answer» D. Electrical conductivity |
81. |
In oxy-acetylene welding colour of oxygen cylinder is |
A. | Red |
B. | Maroon |
C. | Black |
D. | Brown |
Answer» C. Black |
82. |
In oxy-acetylene welding colour of oxygen cylinder is |
A. | Red |
B. | Maroon |
C. | Black |
D. | Brown |
Answer» B. Maroon |
83. |
In arc welding, arc initiation voltage is of the order |
A. | 20-60V |
B. | 60-100V |
C. | 100-140V |
D. | 140-180V |
Answer» B. 60-100V |
84. |
In arc welding, the three elements to be controlled to obtain satisfactory welding operation are |
A. | Current, voltage and speed of travel |
B. | Current, voltage and arc length |
C. | Current, arc length and speedoftravel |
D. | Voltage, arc length and speed oftravel |
Answer» A. Current, voltage and speed of travel |
85. |
Which welding process is used to join two thick plates in one single pass? |
A. | Oxy-acetylene welding |
B. | Gas tungsten arc welding (TIG) |
C. | Gas metal arc welding (MIG) |
D. | Electroslag welding |
Answer» D. Electroslag welding |
86. |
The followingwelding process is usedtoweldfastener to plateswithout drillingorpunching holes? |
A. | Electroslag welding |
B. | Oxy-acetylene welding |
C. | Butt welding |
D. | Stud welding |
Answer» D. Stud welding |
87. |
The process which employ an exothermal chemical reaction to develop high temperature |
A. | Electroslag welding |
B. | Plasmaarcwelding |
C. | Thermit welding |
D. | Stud welding |
Answer» C. Thermit welding |
88. |
Which process allows fusion welds of great depth with minimum width? |
A. | Electron beam welding |
B. | Ultrasonic welding |
C. | Plasma arc welding |
D. | Friction welding |
Answer» A. Electron beam welding |
89. |
The process of carbon arc welding is not used for which of the following material? |
A. | Copper |
B. | Bronze |
C. | Aluminium |
D. | Iron |
Answer» D. Iron |
90. |
The distance from the center of arc to the tip of electrode is called what? |
A. | Arc distance |
B. | Arc length |
C. | Arccrater |
D. | Arcdepth |
Answer» B. Arc length |
91. |
What is the length of the arc generally? |
A. | 1mm –2mm |
B. | 2mm –3mm |
C. | 3mm – 4mm |
D. | 4mm – 5mm |
Answer» C. 3mm – 4mm |
92. |
With an increase in the heatinput of arcwelding method, how does it affectthewelding speed? |
A. | Increases |
B. | Decreases |
C. | Remains same |
D. | No relation |
Answer» B. Decreases |
93. |
With an increase in the heatinput of arc welding method, how does it affectthe required current? |
A. | Increases |
B. | Decreases |
C. | Remains same |
D. | No relation |
Answer» A. Increases |
94. |
Junction between two work piece and weld face is known as? |
A. | Throat |
B. | Toe |
C. | Root |
D. | Puddle |
Answer» A. Throat |
95. |
Portion at which two work piece are at the nearest distance is called as? |
A. | Throat |
B. | Toe |
C. | Root |
D. | Puddle |
Answer» C. Root |
96. |
Which of the following defects occur due to flux employed and electrode coating? |
A. | Inclusion of slay |
B. | Inadequate penetration |
C. | Incomplete fusion |
D. | Porosity |
Answer» A. Inclusion of slay |
97. |
Which ofthe following defectsoccurwhen thedeposited metal are notfocused atthe root of weld? |
A. | Inclusion of slay |
B. | Inadequate penetration |
C. | Incomplete fusion |
D. | Porosity |
Answer» B. Inadequate penetration |
98. |
Which of the following defects occur when weld metal layer fail to fuse together? |
A. | Inclusion of slay |
B. | Inadequate penetration |
C. | Incomplete fusion |
D. | Porosity |
Answer» 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? |
A. | Inclusion of slay |
B. | Inadequate penetration |
C. | Incomplete fusion |
D. | Porosity |
Answer» D. Porosity |
100. |
Which of the following defects occur due to melting or burning away of base metal? |
A. | Under cut |
B. | Spatter |
C. | Cracking in weld metal |
D. | Cold cracking |
Answer» A. Under cut |
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