40) The flame used for oxy-acetylene welding of stainless steel is neutral or

Slightly oxidising

Slightly carburising

Heavily carburising

Heavily oxidising

Answer is:

Slightly carburising

ISRO Technician-B Welder Question Paper - 2017 (Set -1) with Answer Key

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41) Which of the following element is added to about 0.05 - 0.15% to obtain deoxidised copper?

Silicon

Sulphur

Phosphorus

Manganese

Answer is:

Silicon

42) The filler rod suitable for fusion welding of copper is:

Silicon - bronze rod

Manganese - bronze rod

Pure copper rod

Copper - silver alloy rod

Answer is:

Copper - silver alloy rod

43) The purpose of using a run on - run off plate during an arc welding process using a welding generator is

To distribute heat input uniformly

To reduce longitudinal distortion

To avoid slag inclusion effects

To prevent arc blow

Answer is:

To prevent arc blow

44) Which of the following modes of transfer is liable to give high spatters?

Globular and short circuiting

short circuiting and spray

Spray and pulsed spray

Globular and pulsed spray

Answer is:

Globular and short circuiting

ISRO Technician-B Welder Question Paper - 2017 (Set -1) with Answer Key

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40) The flame used for oxy-acetylene welding of stainless steel is neutral or

Slightly carburising

ISRO Technician-B Welder Question Paper - 2017 (Set -1) with Answer Key

Related ISRO Technician-B Welder Question Paper - 2017 (Set -1) with Answer Key

41) Which of the following element is added to about 0.05 - 0.15% to obtain deoxidised copper?

Silicon

42) The filler rod suitable for fusion welding of copper is:

Copper - silver alloy rod

43) The purpose of using a run on - run off plate during an arc welding process using a welding generator is

To prevent arc blow

44) Which of the following modes of transfer is liable to give high spatters?

Globular and short circuiting

ISRO Technician-B Welder Question Paper - 2017 (Set -1) with Answer Key