Guide 1

Question 1

Today, most mild steel electrodes have a wire core composed of:

Answer 1

a rimmed steel
b semiskilled steel
c fully killed steel
d cold-rolled steel

Question 2

In medium coated electrodes,the percentage of the electrode weight derived from the coating is:

Answer 2

a 10% to 25%
b 20% to 35%
c 25% to 40%
d 25% to 55%

Question 3

The main functions of slag do not include:

Answer 3

showing the critical cooling rate of the weld

Question 4

An electrode that is to be used with the DC electrode positive current only is:

Answer 4

E4910

Question 5

The addition of cellulose to an electrode coating will:

Answer 5

improve the weld’s ductility

Question 6

According to CSA Standard W48, a difference between carbon steel covered electrodes and low-alloy steel covered electrodes is that the:

Answer 6

low-alloy steel covered electrodes require a suffix after the electrode designation indicating the alloy content