68) In a plasma arc welding process, the plasma is generated by

Low frequency AC voltage

Low frequency AC current

High frequency AC voltage

High frequency AC current

Answer is:

High frequency AC current

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

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69) Oranges were purchased at the rate of 100 for Rs. 150/- and sold at Rs.2/- per orange. If a profit of Rs.200/- was made, number of oranges sold is

200

400

800

600

Answer is:

400

70) Angle of a quadrilateral are in the ratio 3:2:3:4, then the largest angle is

120

180

Answer is:

120

71) Which of the following statement is not true with reference to a laser beam welding process?

The process uses amplified light energy as a source of welding

The power density of laser beam is much higher compared to an arc welding process

The process essentially requires a vacuum

Focusing of laser beam towards the joint is possible

Answer is:

The process essentially requires a vacuum

72) The purpose of copper coating given on a mild steel filler wire rods is to

Conduct the heat transfer

Increase the strength of the joint

to avoid rusting of the mild steel filler rod during long storage

To give good appearance to the wire

Answer is:

to avoid rusting of the mild steel filler rod during long storage

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

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68) In a plasma arc welding process, the plasma is generated by

High frequency AC current

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

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

69) Oranges were purchased at the rate of 100 for Rs. 150/- and sold at Rs.2/- per orange. If a profit of Rs.200/- was made, number of oranges sold is

400

70) Angle of a quadrilateral are in the ratio 3:2:3:4, then the largest angle is

120

71) Which of the following statement is not true with reference to a laser beam welding process?

The process essentially requires a vacuum

72) The purpose of copper coating given on a mild steel filler wire rods is to

to avoid rusting of the mild steel filler rod during long storage

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