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ISRO Technician-B
Welder
ISRO Technician-B Welder 2016
63

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

63) Carbon supplied by carburising flame makes the weld

Tough

Ductile

Soft

Hard and Brittle

Answer is:

Hard and Brittle

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

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

64) Welding in horizontal, vertical and overhead position is difficult because the molten metal is deposited against gravity. Which physical property of metal helps in retaining the molten metal on the joint in overhead position?

Thermal contraction

Magnetic attraction

Surface tension

Density

Answer is:

Surface tension

65) Which one of the following elements has the highest metallurgical influence on the weldability of steel?

Carbon

Chromium

Manganese

Silicon

Answer is:

Carbon

66) Which of the following types of electrodes is not employed in a GTAW process?

Pure tungsten electrode

Tungsten with 1 - 2 % throrium oxide

Tungsten with 0.3 - 0.5 % zirconium

Tungsten with 1 to 2 % Magnesium

Answer is:

Tungsten with 1 to 2 % Magnesium

67) The plasma mode produced while employing a high welding current of over 100 A in a plasma arc welding process is

Micro plasma

Keyhole plasm

Mega plasma

Ionised plasma

Answer is:

Keyhole plasm

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

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