Welding Technology Mid - II, November - 2014

 October 26, 2015     VIKRAM     516

1. 

Lack of pentration in arc welding is found due to

  • A. 

    High current

  • B. 

    Low current

  • C. 

    short arc

  • D. 

    Too low welding speed



2. 

Spelter is a brazing alloy consisting normally of

  • A. 

    50% Cu 50% Tn

  • B. 

    50% Cu 50% pb

  • C. 

    50% pb 505 Tn

  • D. 

    50%Cu 50%Sn



3. 

Small particles which are thrown out by the arc during welding along with weld metal is called

  • A. 

    Porosity

  • B. 

    Spatter

  • C. 

    Overlap

  • D. 

    undercut



4. 

Braze welding is the process in which the metal of diller rod or wire has a ________ melting point than that of the parent metal

  • A. 

    Lower

  • B. 

    Higher

  • C. 

    same

  • D. 

    None of these



5. 

Welding decay can be avoided by

  • A. 

    Post heating

  • B. 

    pre heating

  • C. 

    post cooling

  • D. 

    pre cooling



6. 

Under cut develops due to

  • A. 

    Poor penetration

  • B. 

    Low current

  • C. 

    High current

  • D. 

    High voltage



7. 

Solder materials is alloy of

  • A. 

    Copper and zink

  • B. 

    Copper and tin

  • C. 

    Lead and tin

  • D. 

    Copper and lead



8. 

The supplier changed the steel composition from 0.15% carbon, 0.6% manaese to 0.2% carbon, 1.2% manganese. Might this influence the _________

  • A. 

    porosity

  • B. 

    cracking in the weld area

  • C. 

    undercut for fillet welds

  • D. 

    Lack of root fusion defects



9. 

Pre-heating a carbon steel manual metal arc welding is carried out to minimize the risk of

  • A. 

    Scattered porosity

  • B. 

    worm hole porosity

  • C. 

    parent metal cracking

  • D. 

    lack of penetration



10. 

The presence of iron sulphides in a weld bead may cause

  • A. 

    Solidification cracking

  • B. 

    Hydragen cracking

  • C. 

    Lamellar tearing

  • D. 

    weld decay



11. 

The flame used to weld cast iron is ____________



12. 

The weldability of carbon steel for a given thickness and joint design, depends mainly on _______ content.



13. 

To weld a cast iron job the electrode will be _________



14. 

During TIG welding of Austenitic stainless steel pipe, Argon gas baking is called to prevent ____



15. 

The property of a material which has the greatest influence on welding distrotion is its _______



16. 

The maximum hardness in the HAZ of steel will increase if the carbon Equivalent value is ______



17. 

The welding machine used to weld non ferrous materials is _______



18. 

To weld aluminium the flame used is ___________



19. 

All alloy steels are successfully welded by _______



20. 

Welding of high strength structural steels are susceptible to cracking in _________ zone in welding



  Related Links
R09 - I Mid - Term Examinations, September - 2014 
R09 - II Mid - Term Examinations, November - 2014