| 1. | Which type of thread is used in acetylene cylinder regulator ? | |
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right hand
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left hand
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acme
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double start
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Report Question| 2. | ____________ is used to protect the eyes and face of a welder from arc radiation and spark_during arc welding ? | |
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safety shoes
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chipping goggles
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welding helmet
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apron
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| 3. | The arc utilized in electric arc welding is a ? | |
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high voltage, high current discharge
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low voltage, low current discharge
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low voltage, high current discharge
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high voltage, low current discharge
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| 4. | The electrode are manufactured in two standard lengths namely ? | |
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250 mm and 350 mm
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350 mm and 450 mm
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400 mm and 500 mm
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500 mm and 550 mm
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| 5. | Cast iron contains two elements, Which make it difficult to cut it by gas cutting. What are these elements ? | |
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sulphur and phosphorus
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silicon and graphite
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graphite and phosphorus
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silicon and sulphur
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| 6. | For use in oxyacetylene gas welding, oxygen is produced by ? | |
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electrolysis of air
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liquefaction of air
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contamination of water
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liquefaction of water
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| 7. | Oxyacetylene gas welding process is a type of ? | |
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diffusion welding
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pressure welding
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tig welding
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fusion welding
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| 8. | The gas flame containing relatively more amount of oxygen than acetylene is called ? | |
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carburizing flame
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neutral flame
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oxidizing flame
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nitriding flame
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| 9. | The welding machine, Which is used to convert AC welding supply to DC welding supply is ? | |
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motor generator set
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engine generator set
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rectifier set
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welding transformer
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| 10. | Molten flux Which solidifies over the weld metal in manual metal arc welding is called ? | |
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heat affected zone
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slag
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cellulose coating
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flash
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