Q:- In GMAW for carbon steel, change of gas from 5% Co2 in Argon with 1oo % Co2 will give effect on the following :

(A). Smoother weld profile with less spatter level

(B). Convex profile bead

(C). Concave profile

(D). Deeper penetration

Q:- Which of the following causes would not influence delay cracking:

(A) High carbon percentage

(B) Grease and paint on the plate surface

(C) Joint type

(d) Cooper percentage used in electrode wire coating

Q:- When welding 28 mm thick carbon steel with GMAW ,what type of shielding gas would not normally used.

1) 25 % CO2 in Argon

2) CO2

3) Argon

4) 5% CO2 in Argon

Q:- Which of the following is not the reason for the increase of HAZ cracking when welding carbon manganese steels:

A). Fast cooling after welding
B). High manganese content
C). High carbon content
D). None of the above

Q:- Steels that have intentional addition of sulphur , lead or selenium to improve machinability :

A) Are used for truck axles only
B) Can not be welded
C) Can develop liquation crack in the HAZ after welding
D) Do not require approved procedures to be welded 

Q:- Which of the welding process used loose granular flux:

A. FCAW

B. SAW

C. GTAW

D. SMAW

Q:- Which of the welding process used loose granular flux:

A. FCAW

B. SAW

C. GTAW

D. SMAW