| 1. | In a gas cut plate, the cut is high quality although there is some surface roughness caused by vertical drag lines. This is due to ? | |
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to slow cutting speed
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impure cutting oxygen
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less preheating flame
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smaller size cutting nozzle
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Report Question| 2. | A welding transformer is used to convert ? | |
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D.C. main supply in to an A.C. welding supply
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A.C. main supply in to an A.C. welding supply
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A.C. main supply in to an D.C. welding supply
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D.C. main supply in to an D.C. welding supply
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| 3. | While gas cutting, the nozzle should __________ ? | |
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touch the work
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be 2 mm away from work
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be 5 mm away from work
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be 10 mm away from work
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| 4. | In an acetylene cylinder the acetylene is devolved in ? | |
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mercury
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acetone
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water
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silver oxide
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| 5. | The electrode size refers to ? | |
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diameter of its core wire
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diameter of electrode
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thickness of flux coating
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length of electrode
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| 6. | The function of the central hole in the tip of the cutting blow pipe is ? | |
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supply oxygen for preheating
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supply acetylene for preheating
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supply oxygen for cutting
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supply acetylene for cutting
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| 7. | Which one of the following types of soldering iron is used for straight s oldering points ? | |
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hatching type soldering iron
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square point soldering iron
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straight soldering iron
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none of the above
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| 8. | It is necessary to remove the flow residues in gas welding ? | |
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to get a good look
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to provide protection to the welder
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to prevent drilling
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to prevent from rust
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| 9. | The reverse polarity in the arc welding is _______ ? | |
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when electrode cable connected to positive terminal
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when electrode cable is connected to negative terminal
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when electrode cable connected to neutral terminal
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none of the above
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| 10. | Brazing is used to join Which two metals ? | |
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brass to brass
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aluminium to aluminium
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steel to steel
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copper to copper
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