8. 1. If the arc length is too short, the
arc has a tendency to short out and
the electrode freezes to the work.
2. During padding, in case of
different plate thickness, 45
degrees is preferably used.
9. 3. The travel angle is the position
the electrode makes with reference
to the surface of the plate on a
plane perpendicular to the weld
axis.
4. Angle of electrode does not vary
in different degrees when welding
metals.
10. 5. Quality or sound weld is the
result of correct current, constant
voltage, travel speed, electrode
angle and correct electrode size.
6. If the current is too low, the
electrode melts too fast.
11. 7. Travelling too fast will make the
bead face narrow with pointing
ripple.
8. Correct arc length will cause the
deposit to be neat of even ripple
and of good penetration.
12. 9. Electrodes for shielded metal arc
welding range in diameter from 2.5
and 3.5 in mm.
10. If the arc is too long, the metal
core melts off in large globules that
wobble from side to side.
14. 1. Small particles of the weld metal
excelled from the welding operation
which adhere to the base metal
surface.
a. spatters
b. burn-through
c. arc strike
d. porosity
15. 2. Usually the effect of a bad weld.
a. spatters
b. burn-through
c. poor welding appearance
d. porosity
16. 3. A gas of essentially trapped
within the weld metal.
a. spatters
b. burn-through
c. blow holes
d. porosity
17. 4. How are you going to eliminate
spatters?
a. reduce arc length
b. choose correct electrode
c. maintain angle as much as possible
d. all of the above
18. 5. How are you going to eliminate
arc strike?
a. reduce arc length
b. practice
c. increase current
d. all of the above
19. 6. An undesirable open hole has
been completely melted through
the base metal, may or may not
be left open.
a. burn-through
b. arc strike
c. porosity
d. spatters
20. 7. How are you going to eliminate
burn-through?
a. reduce welding current
b. choose correct electrode
c. maintain angle as much as possible
d. all of the above
21. 8. How are you going to eliminate
burn-through?
a. reduce welding current
b. choose correct electrode
c. maintain angle as much as possible
d. all of the above
22. 9. How are you going to eliminate
slag inclusion?
a. Completely remove slag from previous
bead
b. Use higher welding current
c. Reduce weaving width
d. all of the above
23. 10. What is the cause of incomplete
penetration?
a. Wrong electrode
b. Too low welding current
c. Too fast or slow travel speed
d. All of the above
24. 11. What type of an electrode oven with a
maintaining temperature of 70 C +/- 10?
A. Drying oven
B. Holding oven
C. Portable oven
D. Heating oven
25. 12. Which oven holds a temperature of 150
C +/- 20?
A. Drying oven
B. Holding oven
C. Portable oven
D. Heating oven
26. 13. Which electrode oven refers to welder’s
oven?
A. Baking oven
B. Holding oven
C. Portable oven
D. Heating oven
27. 14. What is the maximum time for drying
the electrode?
A. 2 hours
B. 3 hours
C. 4 hours
D. 5 hours
28. 15. In the symbol E-6013, which of the
following stands for letter E?
A. Electricity
B. Energy
C. Electrode
D. Electronic
29. 16. Which of the following refers to the first
two or first three digit numbers of the
symbol E-11012?
A. Electrode
B. Polarity
C. Welding position
D. Tensile strength
30. 17. Which of the following electrode oven
holds a temperature 200 C to 300 C?
A. Drying oven
B. Holding oven
C. Portable oven
D. Heating oven
