24) Which of the following non-destructive test methods cannot be employed to detect defects inside the weldment?

Ultrasonic test

Dye Penetrant test

X-ray test

Gamma ray test

Answer is:

Dye Penetrant test

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

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25) Low hydrogen electrodes are baked prior to use in order that

proper strength is obtained

welding is free from arc blow

welding is free from moisture pick up

current required is minimum

Answer is:

welding is free from moisture pick up

26) Which one of the following factors is taken into account while selecting a nozzle for gas welding?

Flux melting point

base metal melting point

filler metal melting point

temperature of flame to be set

Answer is:

base metal melting point

27) Acetylene is a chemical compound of

Carbon and oxygen

Carbon and nitrogen

Carbon and hydrogen

Carbon and calcium

Answer is:

Carbon and hydrogen

28) Which of the following electrodes can be used on both AC and DC welding machines?

carbon electrode

aluminium electrode

metal electrode

mild steel coated electrode

Answer is:

mild steel coated electrode

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

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24) Which of the following non-destructive test methods cannot be employed to detect defects inside the weldment?

Dye Penetrant test

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

25) Low hydrogen electrodes are baked prior to use in order that

welding is free from moisture pick up

26) Which one of the following factors is taken into account while selecting a nozzle for gas welding?

base metal melting point

27) Acetylene is a chemical compound of

Carbon and hydrogen

28) Which of the following electrodes can be used on both AC and DC welding machines?

mild steel coated electrode

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