Smaw

Question 1

Electrode negative is what polarity?

Answer 1

Straight polarity

Question 2

Which current flows in 1 direction only and has either a positive or negative value?

Answer 2

Dc current

Question 3

Electrode positive means

Answer 3

Reverse polarity

Question 4

What is the approximate length of a normal arc?

Answer 4

Same as diameter of the core wire

Question 5

The ability of a metal to permanently deform under load without breaking is:

Answer 5

Ductility

Question 6

The ultimate pull a part a material can withstand is:

Answer 6

Tensile strength

Question 7

Izod or charpy are what kind of tests?

Answer 7

Impact tests

Question 8

Dynamically loaded structures are subject too

Answer 8

Reversals of stress

Question 9

Recommended moisture for 6010

Answer 9

3 to 7 %

Question 10

Best rod to use when base metal properties are unknown

Answer 10

E7018

Question 11

E4918 stands for (numeric positions)

Answer 11

E :electrode
49: min as welded tensile strength
1 : welding position
8 :coating,current and arc characteristics

Question 12

Welding position 1

Answer 12

All

Question 13

Welding position 2

Answer 13

Flat and horizontal

Question 14

Welding position 3

Answer 14

Flat only

Question 15

Welding position 4

Answer 15

Flat, horizontal, overhead and vertical down

Question 16

Last digit 0/1 coating and current type

Answer 16

Cellulose , 0 dcrp, 1 ac or dcrp

Question 17

Last digit 2/3/4 coating and current type

Answer 17

Rutile 2 ac or dcsp. 3/4 ac or dc either polarity

Question 18

Last digit 5/6/8 coating and current type

Answer 18

Lime. 5) dcrp
6)ac or dcrp
8) same

Question 19

Last digit 7 coating current type

Answer 19

Iron oxide and ac or dc either polarity

Question 20

What electrode inclination is recommended for the first pass on a 2f weld

Answer 20

5 to 30 degrees backhand

Question 21

For complete penetration on an open root groove weld using 6010 you must

Answer 21

Carry a continuous key hole

Question 22

asme f number groups are used?

Answer 22

to group electrodes according to their usability characteristics

Question 23

the core of mild steel electrodes

a. are made up of expensive strong steel
b. always gives the weld its desired strength
c. Is made from a rimmed steel ignot
d. must be free of magnetic fields at all times

Answer 23

c. made from a rimmed steel ignot

Question 24

A designation of 4F-F4 is a weld done with which electrode and in what position?

a.vertical position with CSA E4310 (AWS E6010)
b.overhead position with CSA E4310 (AWS E6010)
c.vertical position with CSA E4918 (AWS E7018)
d.overhead position with CSA E4918 (AWS E7018)

Answer 24

overhead position with CSA E4918 (AWS E7018)

Question 25

A designation of 2F-F3 is a weld done with which electrode and in what position?

a. horizontal position with CSA E4310 (AWS E6010)
b. flat position with CSA E4310 (AWS E6010)
c. horizontal position with CSA E4918 (AWS E7018)
d. vertical position with CSA E4918 (AWS E7018)

Answer 25

horizontal position with CSA E4310 (AWS E6010)

Question 26

When weaving, the side motion of the electrode should not exceed ___ times the electrode diameter.

Answer 26

2 to 3

Question 27

A test weld using a backing bar requires a stop/start where?

a. 25.4 mm (1”) from each end
b. 38 mm (1 ½”) from each end
c. 50.8 mm (2”) from each end
d. 76 mm (3”) from each end

Answer 27

38 mm (1 ½”) from each end

Question 28

What is manipulative welding technique

Answer 28

Stepping/ whipping (6010)

Question 29

Estimate rod current settings(math) for 1/8 7018

Answer 29

1/8 = .125 = 125 amps
Or
40 x 3.2 = 128