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

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

56) Purpose of using flux in soldering is to

Answer is:

Prevent formation of oxides

57) Which among the following gas flame combinations provide the highest temperature?

Answer is:

Oxy-acetylene

58) Backfire, a small explosion of flame occuring at the torch tip in oxy-acetylene process is due to

Answer is:

Any of the above

59) An electrode is designated using IS coding as ER 4334. The type of covering used in the electrode is

Answer is:

Rutile

60) In which of the following destructive test methods is a saw cut ~ 1.5 mm made along the centre line of weld followed by hammer blow from reverse side

Answer is:

Nick break test

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