MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Manufacturing Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
IN_CASE_OF_SUBMERGED_ARC_WELDING,_THE_ELECTRODES_UPTO___________DIAMETER_MAY_BE_USED.?$ |
| A. | 30 mm |
| B. | 20 mm |
| C. | 15 mm |
| D. | 12 mm |
| Answer» E. | |
| 2. |
Material used for coating the electrode is called$ |
| A. | flux |
| B. | slag |
| C. | protective layer |
| D. | deoxidiser |
| Answer» B. slag | |
| 3. |
In_arc_welding,_arc_in_created_between_the_electrode_and_work_by$ |
| A. | contact resistance |
| B. | flow of voltage |
| C. | flow of current |
| D. | electrical energy |
| Answer» E. | |
| 4. |
The temperature, in arc welding, is of the order of |
| A. | 2000<sup>0</sup> |
| B. | 3000<sup>0</sup> |
| C. | 5500<sup>0</sup> |
| D. | 7000<sup>0</sup> |
| Answer» D. 7000<sup>0</sup> | |
| 5. |
Which of the following gases are used in Tungsten inert gas welding? |
| A. | Helium and neon |
| B. | Hydrogen and oxygen |
| C. | Argon and helium |
| D. | Carbon dioxide and hydrogen |
| Answer» D. Carbon dioxide and hydrogen | |
| 6. |
____________is_the_welding_process_in_which_two_pieces_to_be_joined_are_overlapped_and_placed_between_two_pointed_electrodes. |
| A. | Seam welding |
| B. | Resistance welding |
| C. | Projection welding |
| D. | Spot welding |
| Answer» E. | |
| 7. |
_____________ is the welding process in which heat is produced for welding by chemical reaction? |
| A. | Resisting welding |
| B. | Thermit welding |
| C. | Forge welding |
| D. | Gas welding |
| Answer» C. Forge welding | |
| 8. |
In resistance welding, between the electrodes, a current of __________ voltage and __________ ampere is passed. |
| A. | high, high |
| B. | high, low |
| C. | low, low |
| D. | low, high |
| Answer» E. | |
| 9. |
Due to which of the following reasons, no flux is used in atomic hydrogen welding? |
| A. | The burning hydrogen shields the molten metal |
| B. | Two electrodes are coated which gradually release the flux |
| C. | The filler rod is coated with flux |
| D. | One of the two electrodes is coated which releases the flux |
| Answer» B. Two electrodes are coated which gradually release the flux | |
| 10. |
For grey cast iron, which of the following welding methods is preferable? |
| A. | MIG |
| B. | submerged arc |
| C. | gas flame |
| D. | electric arc |
| Answer» B. submerged arc | |
| 11. |
______________ brazing process is good for mass scale. |
| A. | Furnace |
| B. | Induction |
| C. | Dip |
| D. | Torch |
| Answer» B. Induction | |
| 12. |
In ___________________ welding two non consumable electrodes are used. |
| A. | MIG |
| B. | TIG |
| C. | atomic hydrogen |
| D. | submerged arc |
| Answer» D. submerged arc | |
| 13. |
Upon which of the following parameters does the current intensity in arc welding depend? |
| A. | stability of arc |
| B. | electrode diameter |
| C. | gap between the electrode and parent metals |
| D. | thickness of parent metals |
| Answer» C. gap between the electrode and parent metals | |
| 14. |
Consider a situation in which a welding operation is being performed with V = 20 volts, I = 200 A, and the cross-sectional area of the weld bead is 30 mm2. Estimate the welding speed if the workpiece and electrode are made of (a) aluminum, (b) carbon steel, and (c) titanium. Use an efficiency of 75%. |
| A. | 35 mm/s |
| B. | 34.5 mm/s |
| C. | 36 mm/s |
| D. | 46 mm/s |
| Answer» C. 36 mm/s | |