MCQOPTIONS
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MCQOPTIONS
This section includes 15 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. |
Amount of current required to generate the arc under no load condition is called? |
| A. | Open circuit current |
| B. | Closed circuit current |
| C. | Short circuit current |
| D. | Arc current |
| Answer» D. Arc current | |
| 2. |
IN_PLASMA_ARC_WELDING_THE_GAS_IS??$ |
| A. | Ionized |
| B. | Heated |
| C. | Magnetized |
| D. | Vaporized |
| Answer» B. Heated | |
| 3. |
The deflection of the arc in arc blow is by?$ |
| A. | Electric field |
| B. | Magnetic field |
| C. | Combination of both |
| D. | Hydrostatic field |
| Answer» C. Combination of both | |
| 4. |
If_the_heat_transfer_efficiency_is_0.5_and_the_melting_efficiency_is_0.6,_then_the_overall_efficiency_will_be?$ |
| A. | .83 |
| B. | .03 |
| C. | .30 |
| D. | .12 |
| Answer» D. .12 | |
| 5. |
In order to prevent oxidation and retain molten metal in stud welding which of the following is used? |
| A. | Ceramic rings |
| B. | Metal rings |
| C. | Non metal rings |
| D. | Flux |
| Answer» B. Metal rings | |
| 6. |
Which of the following inert gas is used with DC power supply only? |
| A. | Argon |
| B. | Helium |
| C. | CO<sub>2</sub> |
| D. | All of the Mentioned |
| Answer» D. All of the Mentioned | |
| 7. |
Which of the following gas welding uses constant voltage welding? |
| A. | Submerged arc welding |
| B. | Tungsten inert gas welding |
| C. | Stud welding |
| D. | Gas metal arc welding |
| Answer» E. | |
| 8. |
If_the_total_efficiency_is_0.35_in_arc_welding._Then_what_is_the_welding_speed_in_mm/sec_if_the_cross_sectional_area_is_5mm2,_welding_power_is_2_kW_and_the_heat_required_in_melting_the_metal_is_100_J/mm3. |
| A. | 1.4 |
| B. | 14 |
| C. | 1400 |
| D. | 140 |
| Answer» B. 14 | |
| 9. |
What is the only difference between Plasma arc welding and TIG welding? |
| A. | Flux is not used |
| B. | Construction of torch is different |
| C. | Gas is not used |
| D. | None of the Mentioned |
| Answer» C. Gas is not used | |
| 10. |
In which of the following gas welding process a non consumable electrode is used? |
| A. | Submerged arc welding |
| B. | Tungsten inert gas welding |
| C. | Stud welding |
| D. | Gas metal arc welding |
| Answer» C. Stud welding | |
| 11. |
What is the function of flux in submerged arc welding? |
| A. | To completely cover the welded zone |
| B. | To prevent oxidation of joint |
| C. | To prevent spattering of molten metal |
| D. | All of the Mentioned |
| Answer» E. | |
| 12. |
How does the arc voltage V depends upon the length of arc L? |
| A. | V=f(L) |
| B. | V=1/f(L) |
| C. | V=f(L2) |
| D. | V=f(‚àöL) |
| Answer» B. V=1/f(L) | |
| 13. |
If the open circuit voltage is 60 volt and the short circuit current is 20 ampere. Then determine the voltage required for welding if the current required during welding is 10 ampere? |
| A. | 30v |
| B. | 60v |
| C. | 20v |
| D. | 40v |
| Answer» B. 60v | |
| 14. |
Amount of voltage required to generate the arc under no load condition is called? |
| A. | Open circuit voltage |
| B. | Closed circuit voltage |
| C. | Short circuit voltage |
| D. | Arc voltage |
| Answer» B. Closed circuit voltage | |
| 15. |
Amount of time during which the transformer will be used for welding under normal loading condition is known as? |
| A. | Hold time |
| B. | Off time |
| C. | Weld time |
| D. | Duty cycle |
| Answer» E. | |