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

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

51) For welding dissimilar metals, which of the following properties should not have wide variations.

Answer is:

Thermal expansion

52) Rating of soldering iron normally used for electronics works is in the range

Answer is:

50 - 100 Watts

53) Which of the following non-destructive testing methods can be used to detect minute surface cracks in a weldment of non-magnetic alloy?

Answer is:

Penetration test

54) For ultrasonic welding, the thickness of the metal is usually restricted to

Answer is:

3 mm

55) In arc welding process, better arc stability is achieved with

Answer is:

Alternating current

Explanation:

In arc welding process, better arc stability is achieved with Alternating current.

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