Safety
Spilled liquids such as water, lacquer, and stain must be cleaned up immediately because:
it makes the shop dirty, some liquids can cause fire, they can cause a person to slip and fall
True or False
With the bayonet saw, the housing and handle should be kept free of grease, chips, and dust
true
What is the difference between AC and DC
AC- alternating current
DC-direct current
What is a weld bead, and what factors affect its appearance?
Deposited weld metal from the welding process.
Affected by travel speed, current/amperage, electrode angle, arc length, and technique.
You are assigned a vertical-up weld. How must your travel speed and rod angle change?
Slow travel speed
Maintain upward rod angle
Slight weaving motion for proper penetration
In case of fire, you should
notify the instructor immediately
True or False
With the belt finishing machine, there are directional arrows inside the belt
true
What is porosity in a weld and what causes it?
Small gas pockets or voids in weld metal.
Caused by moisture, contamination, improper shielding, or technique errors.
The electrode keeps sticking to the metal. List two possible reasons
Amperage too low
Incorrect electrode angle
Arc too short or touching metal too long
What is a welding position?
Orientation of the joint being welded.
students are allowed to use the ladder
only if they have the help from another student
Name 3 of Ms. Huffman's Class expectations
-do not come behind my desk
-do not sit or lay on the desk
-no phones, not hats
-respect everyone
-do not leave the room without my permission
What is the purpose of a welding ground clamp?
Completes the electrical circuit between welder and workpiece for the arc to form
Explain how improper joint preparation can weaken a weld.
Poor fit-up, dirt, rust, or oil prevents proper bonding
Leads to weak or defective welds
Your welds are showing excessive spatter. What might be the cause?
Too high voltage/amperage
Arc length too long
Contaminated metal
Wrong polarity
in case of emergency, you must
push the shut off switch and immediately inform the instructor
What PPE is required when welding, and why?
-helmet, gloves, long sleeves, boots, safety glasses, ear protection
-protects you from burns, sparks, UV/IR light, and flying debris
What are 3 things needed to strike an arc
A weld test plate shows lack of fusion. What likely caused it?
Low heat/amperage
Dirty or poorly prepared metal
Travel speed too fast
Incorrect electrode angle
Describe a fillet weld.
Weld joining two surfaces at a right angle (common in lap, T, or corner joints).
Running and joking around in the shop is not permitted because
it is dangerous and can cause personal injury or damage to equipment
Broken tools or machinery should be reported immediately to
the instructor
You must weld thin sheet metal without burning through. What settings and techniques should be adjusted?
-lower amperage/ current
-faster travel speed
-use smaller wire/electrode
-consider stitch or tack welding technique
You notice a crack forming at the end of your weld. What caused it and how can it be prevented?
Caused by rapid cooling or improper crater fill
Prevent by filling crater at end of weld and maintaining steady travel
What is a tack weld, and when is it used?
Small weld to hold parts temporarily in place before final welding.