47) Which of the following welding process is not generally employed for welding of plastics?

Ultrasonic welding

Gas welding

TIG welding

Friction welding

Answer is:

TIG welding

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 speed

Welding voltage

Welding current

Electrode wire extension

Answer is:

Welding voltage

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

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

For more MCQ's Click Here

47) Which of the following welding process is not generally employed for welding of plastics?

TIG welding

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

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

Welding voltage

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

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