for learning

2. REVIEW
 WHAT ISWELDING?
• Its is a process to joining two metal using SMAWWelding or Melted Electrode
 What are the advantage of SMAW process?
• Answer:
 Equipment used is simple, inexpensive and portable
 Electrode provides and regulates own flux
 Lower sensitivity to wind and drafts than gas shielded welding process
 All position capability
 . What are the disadvantages or limitations of SMAW process?
Answer:
 It require des-lagging after each weld
 Welding must be stopped after each electrode
 it forms harmful fumes during welding

3.  What are the types of welding machines that can be used for shielded metal Arc Welding process?
Answer:
 Transformer type
 Rectifier-rectifier type
 Generator type
 Inverter type
 How would you prevent the occurrence of slag inclusion?
Answer:
 Clean the base metal (remove paint, oil etc.)
 Remove slag before re-starting welding
 What is the cause of poor penetration and incomplete fusion?
 to low welding current
 Incorrect electrode angle
 What causes warpage or distortion?
• Answer:
 wrong joint preparation
 incorrect welding techniques
 use of high amperage
 improper bead size/profile
 wrong choice of diameter electrodes

4.  How would you avoid electric shock during welding?
Answer:
 Ground all electrical equipment and the work piece
 Use the recommended cable size
 Make sure all electrical connections are tight, clean and dry
 Keep work cables and connectors in god condition at all times
 Keep cables and connectors in good condition at all times
 Wear insulated gloves when adjusting equipment
 Follow safety standards
 . What are the welding parameters that must be considered to produce quality weld?
• Answer:
 Current setting
 Length of arc
 Angle of electrode
 Manipulation of weld (weave or stringer)
 Speed travel

6. USES AND IMAGE OFTHE DIFFERENTS
PART OF SMAW PROCESS
ELECTRODE HOLDER
• used to guide the electrode over the
weld joint and feed the electrode over
the weld joint and feed the electrode
into the weld puddle as it is consumed

7. USES AND IMAGE OFTHE DIFERENTS PART
OF SMAW PROCESS
GROUND CLAMPS
• used to connect the ground cable to the
work piece

8. USES AND IMAGE OFTHE DIFERENTS PART
OF SMAW PROCESS
ELECTRODE
• used in different battery types,
electroplating and electrolysis, welding,
cathodic protection, membrane electrode
assembly
THERE ARE 3 PARTS OF ELECTRODE
1. FLUX COATING/ COVER
2. TIP OF ELECTRODE
3. CORE WIRE

9. USES AND IMAGE OFTHE DIFERENTS PART
OF SMAW PROCESS
WELDING MACHINE
• A welding machine is a device used to join
materials together

10. Operating principle Of SMAW

11. THE DIFFERENTTYPES OFWELDING
POSITION IN PLATE AND PIPES
• 1 GROOVEWELD
• 2. FILLET WELD