Fundamental of Welding Science and Technology NPTEL ANSWERS : WEEK 5 (1)

Fundamental of Welding Science and Technology NPTEL ANSWERS : WEEK 5

PART 1

ASSIGNMENT 6 CLICK HERE

1. To study the metal transfer in SMAW or SAW

 High speed camera is used

 IR camera is used

 X-rays is used

 none of these

C                    LECTURE 1

1 point

2. Lorentz force in welding metal transfer is a type of

 Electromagnetic force

 Retard force

 Gravity force

 All of these

A                   LECTURE 1

1 point

3.  The necking force in metal transfer in welding is

 Directly proportional to square of welding current

 Inversely proportional to square of welding current

 Directly proportional to welding current

 Inversely proportional to welding current

A                     LECTURE 1

1 point

4. Streaming spray metal transfer occurs:

 At a current which is higher than rotating spray metal transfer current

 At a current which is less than projected spray metal transfer current

 At a very low current which is just higher than short-circuiting metal transfer current

 At a current which is less than rotating spray metal transfer current

D                     LECTURE 2

1 point

5. In welding the globular metal transfer occurs

 Above the transition current

 Below the transition current

 Both (a) and (b)

 None of these

B                          LECTURE 2

FOR  FURTHER ANSWERS (6-10)  CLICK HERE