McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Manufacturing Engineering .
Chapters
| 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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