Materials Science and Manufacturing Engineering Miscellaneous
- The temperature of a carburizing flame in gas welding that of a neutral or an oxidizing flame
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Due to insufficient acetylene, complete oxygen is not utilized that is why lower temperature than neutral or oxidising flame. Carburising flame – 2900°C Neutral flame – 3100°C Oxidising flame – 3300°C
Correct Option: A
Due to insufficient acetylene, complete oxygen is not utilized that is why lower temperature than neutral or oxidising flame. Carburising flame – 2900°C Neutral flame – 3100°C Oxidising flame – 3300°C
- For butt welding 40 mm thick steel plates, when the expected quantity of such jobs is 5000 per month over a period of 10 years, choose the best suitable welding process out of the following available alternatives.
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No. of jobs is very high, therefore we need a welding process which is capable of welding in one pass. Therefore, SAW is chosen over others.
Correct Option: A
No. of jobs is very high, therefore we need a welding process which is capable of welding in one pass. Therefore, SAW is chosen over others.
- The ratio of acetylene to oxygen is approximately for neutral flame used in gas welding
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1 : 1 in terms of volume but not in weight.
Correct Option: A
1 : 1 in terms of volume but not in weight.
- For gas welding a particular job using a neutral oxyacetylene flame the acetylene consumption was 10 litres. The oxygen consumption from the cylinder in liters will be
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In neutral flame, volume of both oxygen and acetylene are equal.
Correct Option: B
In neutral flame, volume of both oxygen and acetylene are equal.
