48) The arc length in a submerged arc welding process is controlled by

Welding speed

Welding voltage

Welding current

Electrode wire extension

Answer is:

Welding voltage

ISRO Technician-B Welder Question Paper - 2016 (Set -1) with Answer Key

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49) The edges of thick cylindrical sections can be welded without any edge preparation by

Friction Stir welding

Electron beam welding

Electro slag welding

Plasma welding

Answer is:

Friction Stir welding

50) While repair welding a crack in a cast iron body, the extension of crack can be controlled by:

Tacking at both ends of the crack

Preheating

Grooving the crack

Drilling at both ends of the crack

Answer is:

Drilling at both ends of the crack

51) The presence of which of the following gases has the harmful effect of leading to cracking of a weldment?

Oxygen

Hydrogen

Nitrogen

Argon

Answer is:

Hydrogen

52) The word 'LASER' is an acronym for:

Light Amplification by Stimulated Emission of Radiation

Light Augmentation by Stimulated Emission of Radiation

Light Amplification by Sustained Emission of Radiation

Light Augmentation by Sustained Emission of Radiation

Answer is:

Light Amplification by Stimulated Emission of Radiation

ISRO Technician-B Welder Question Paper - 2016 (Set -1) with Answer Key

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48) The arc length in a submerged arc welding process is controlled by

Welding voltage

ISRO Technician-B Welder Question Paper - 2016 (Set -1) with Answer Key

Related ISRO Technician-B Welder Question Paper - 2016 (Set -1) with Answer Key

49) The edges of thick cylindrical sections can be welded without any edge preparation by

Friction Stir welding

50) While repair welding a crack in a cast iron body, the extension of crack can be controlled by:

Drilling at both ends of the crack

51) The presence of which of the following gases has the harmful effect of leading to cracking of a weldment?

Hydrogen

52) The word 'LASER' is an acronym for:

Light Amplification by Stimulated Emission of Radiation

ISRO Technician-B Welder Question Paper - 2016 (Set -1) with Answer Key