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

Carbon

Chromium

Manganese

Silicon

Answer is:

Carbon

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

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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

68) The main advantage of using iron powder electrode is

avoids crack in the joint

increase the strength of flux coating

reduce time required to complete the weld

easily conduct electricity through electrode

Answer is:

reduce time required to complete the weld

69) Which of the following statements is not true with respect to an Electron beam welding process?

The process essentially requires a vacuum

The process essentially requires a filler wire

Highly reactive metals can be welded using the process

The cost of EBW equipment is comparatively higher with respect to other arc welding processes

Answer is:

The process essentially requires a filler wire

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

For more MCQ's Click Here

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

Carbon

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

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

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

Keyhole plasm

68) The main advantage of using iron powder electrode is

reduce time required to complete the weld

69) Which of the following statements is not true with respect to an Electron beam welding process?

The process essentially requires a filler wire

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