Which of the following mainly decides the current to be employed is arc welding?

A. Electrode size

B. Plate thickness

C. Voltage across the arc

D. Welded portion length

Please do not use chat terms. Example: avoid using "grt" instead of "great".

You can do it
  1. Solute atoms which cause yield point phenomenon in mild steel are/is
  2. The fugacity of liquid water at 298 K is approximately 3171 Pa. Considering the ideal heat of vaporisation…
  3. Ultimate strength in tension as compared to that in shear for steel is
  4. Thermal conductivity of a material does not depend upon its
  5. Holes for riveting purposes should be preferably made by
  6. Friction factor for fluid flow in pipe does not depend upon the
  7. Which of the following rays has the least wavelength?
  8. Pick out the wrong statement about nucleate boiling.
  9. On being hit with a hammer, __________ will readily fracture.
  10. Increasing sulphur content in pig iron tends to make it
  11. Laser welding is widely employed in the __________ industries.
  12. Natural water contains approximately __________ percent of heavy water.
  13. Brittleness induced due to the presence of sulphur in steel can be reduced by adding
  14. __________ circuit is most commonly used to measure strain with the help of a strain gauge.
  15. Pick out the wrong statement about the machinability of metals. Machinability of a metal
  16. Which of the following fastening devices has its both ends threaded?
  17. Pick out the wrong statement.
  18. Which of the following is an example of stress corrosion?
  19. Main constituent of bone ash is
  20. Pick out the wrong statement
  21. Angular displacement can be measured suitably by a
  22. Oxyacetylene reducing flame is used while carrying out welding on
  23. Spheroidising of a material is a/an __________ process.
  24. Hydro-cyclone is a
  25. Fibre glass is a composite material of
  26. The pressure drop per unit length for laminar flow of fluid through a long pipe is proportional to (where,…
  27. For infinite parallel planes having emissivities ε1 & ε2, the interchange factor for radiation…
  28. Biological shield in a nuclear reactor is generally provided to protect against the
  29. Powder metallurgy technique is used in the production of __________ tools.
  30. Most important property of steels for use in automobile bodies is the