Welding Multiple Choice Questions and Answers

61. Acetylene is a fuel gas for gas cutting & welding composed of

1. 7.7 of carbon & 92.3 % of hydrogen
2. 92.3% carbon & 7.7 % hydrogen
3. 100% carbon
4. 50% carbon & 50% hydrogrn

62. Double-V and double-U butt welds are used for plates of thickness

1. 1-5mm
2. 5-10mm
3. 10-15mm
4. over 15mm