The document outlines classroom rules emphasizing respect, communication, and responsibility, alongside safety measures for performing tack welding. It defines key terms related to welding, discusses the importance of protective gear and proper techniques, and suggests an activity for hands-on learning in small groups. The conclusion highlights the necessity of mastering welding skills through knowledge and practice.

2. CLASSROOM RULES:
1.Respect yourself, your peers, and your teacher
at all times.
2. Raise your hand and wait to be called on
before
speaking or leaving your seat.
3. Listen attentively while others are speaking,
and participate actively in discussions.

3. CLASSROOM RULES:
4. Keep your electronic devices silenced and put
away unless otherwise instructed by the
teacher.
5. Follow instructions promptly and complete
assignments to the best of your ability.

4. CLASSROOM RULES:
6. Stay seated until the class is dismissed, unless
given permission to leave by the teacher.
7. Be responsible for your own learning and
seek
help when needed.

6. TACK WELDING
by Mark Saura

7. Objective
Perform tack welding in accordance with
the welding procedures

8. Unlocking of Difficult Terms:
1. Fumes – a particles or substances that are
dangerous to inhale.
SYNONYM: Vapor, Smoke
In Cebuano: Asu
In Filipino: Singaw, Usok

9. Unlocking of Difficult Terms:
2. Preheating - is a temperature to which a metal
or electrode is heated before an operation is
performed
SYNONYM: Warming up, Tempering
In Cebuano: Pagpainit daan
In Filipino: Paunang Pagpapainit

10. Question:
What are safety precautions that need to be
practiced before, during, and after performing
tack welding?

11. Safety Measures in Tack Welding
Before Tack Welding:
• Ensure proper protective gear:
• Inspect tools and equipment:
•
• Prepare the workspace:

12. Safety Measures in Tack Welding
During Tack Welding:
• Maintain correct posture and distance:
• Follow proper welding techniques:
• Monitor surroundings:

13. Safety Measures in Tack Welding
After Tack Welding:
• Turn off and store equipment properly:
• Inspect the workpiece:
• Dispose of waste materials:

14. Question:
Since we will perform tack weld in a flat
position what essential should be considered
to ensure that the weld bead attach to the
2-base metal?

15. Answer:
Correct Electrode angle.
In performing tack weld in
a flat position, we need to consider the angle of
electrode. And that is 45 to 75 degrees.

16. Question:
Why do we need to wear protective clothing
such as welding apron and jacket?

17. SCIENTIFIC INTEGRATION
HEAT TRANSFER
Conduction
This occurs when heat is
transferred through direct contact.
Convection
This is heat transfer through a
fluid (liquid or gas).
Radiation:
Heat can also be transferred in the
form of infrared radiation, which does
not require direct contact.

18. TLE Cookery
Convection
(Heat transfer through air or
liquid)

19. TLE Cookery
Conduction
(Heat transfer through direct
contact)

20. TLE Cookery
Radiation
(Heat transfer through
electromagnetic waves):

21. MATH INTEGRATION
Electrode Angle
An acute angle is defined as an angle
that is less than 90 degrees. In the
context of welding, the angle of the
electrode in relation to the workpiece
forms an acute angle, which affects the
penetration and appearance of the weld
bead.

22. ACTVITY TIME
Divide yourselves into four groups. Each
group will be given a Performance task
sheet in Performing Tack welding in Flat
position.
Read and comprehend the instruction
indicated in the task sheet. You have 10
minutes to the activity

23. Assess your work using a
performance checklist and
engage in peer feedback

24. Your performance will be grade based on the given
Rubric

25. Conclusion:
Mastering Welding
Welding is a skilled trade that
requires knowledge, precision, and
practice. By understanding the
fundamentals and following proper
procedures, you can create strong
and durable welds.