1. The maximum obtainable flame temperature of oxy-acetylene welding is
2. The temperature produced in inner luminous cone ( neutral flame) of oxy-acetylene welding is
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Answer is (d)
3150 degree C
3. The temperature produced in outer cone (neutral flame) of oxy-acetylene welding is
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Answer is (a)
1250 degree C
4. In oxy-acetylene welding a neutral flame is obtained by supplying
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Answer is (a)
equal volume of oxygen and acetylene
5. In oxy-acetylene welding a oxidizing flame is obtained by supplying
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Answer is (b)
excess volume of oxygen over acetylene
6. In oxy-acetylene welding a carburizing or reducing flame is obtained by supplying
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Answer is (c)
excess volume of acetylene over oxygen
7. The neutral flame is more often used for the welding of
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Answer is (a)
low carbon steel ,cast steel, cast iron etc
8. The oxidizing flame is more often used for the welding of
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Answer is (b)
Manganese steel, brass and bronze etc
9. The carburizing or reducing flame is more often used for the welding of
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Answer is (c)
Aluminium and nickel etc
