64) while using which of the following electrodes in a GTAW process, additional safety measure against radiations needs to be addressed?

Thoriated tungsten electrodes

Ceriated tungsten electrodes

Zirconiated tungsten electrodes

Lanthanated tungsten electrodes

Answer is:

Thoriated tungsten electrodes

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

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65) The temperature obtained in a plasma jet torch employed for plasma arc welding operation is of the order of

26000 degree celsius

3000 degree celsius

10000 degree celsius

13000 degree Celsius

Answer is:

13000 degree Celsius

66) Twin carbon arc welding refers to

Arc welding process using two arcs established using a single electrode

Arc welding process in which arc is established and maintained using two carbon electrodes held with a special holder

Two joints simultaneously welded using a single electrode

None of the above

Answer is:

Arc welding process in which arc is established and maintained using two carbon electrodes held with a special holder

67) Which of the following welding process employs a Langmuir torch?

Atomic hydrogen welding

Laser beam welding

Tungsten inert gas welding

Electron beam welding

Answer is:

Atomic hydrogen welding

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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64) while using which of the following electrodes in a GTAW process, additional safety measure against radiations needs to be addressed?

Thoriated tungsten electrodes

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

65) The temperature obtained in a plasma jet torch employed for plasma arc welding operation is of the order of

13000 degree Celsius

66) Twin carbon arc welding refers to

Arc welding process in which arc is established and maintained using two carbon electrodes held with a special holder

67) Which of the following welding process employs a Langmuir torch?

Atomic hydrogen welding

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