Shop Fabrication Flashcards
What piece of personal protective equipment (PPE) is the most important to wear?
A welding helmet to protect your eyes and your face
Why is argon gas dangous in an enclosed space?
Argon gas is heavier than air and can displace the oxygen, which leads to suffocation.
What 3 procedures are required before returning an empty compressed gas cylinder?
- Close the valve completely
- Install the protective cap
- Replace any valve plugs or caps
List 3 adfvantages of GTAW.
- It has the abilityy to join most weldable metals and alloys including aluminum, magnesium, mild and low alloy steels, sopper and nickel alloys.
- Most welds made with GTAW are high quality welds with excellent mechanical properties.
- There is no weld splatteer, as the filler metal is added directly to the weld pool.
Name the parts of the torch assembly
- A - Gas Nozzle
- B - Electrode
- C - Collet Body
- D - Collet
- E - Torch Cap
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What portion of a plan view for a rectangle to round fitting needs to be developed if the round portion is flat on top and centred in the other direction?
- Full Plan View
- 1/4 Plan View
- 1/2 Plan View
- None of the above
- 1/2 Plan View
When is it advisable to use more than 12 element points to layout a triangulated pattern for a square to round?
When the round end is more than 12”.
When laying out a pattern for a square to round fitting that is centered, you need to layout only a __ _______ of the fitting.
1/4 pattern
Why is it best to place all construction lines on the inside of the pattern?
Construction lines on the inside make for a neater job.
When folding the allowance for a grooved seam, you should always do what?
- Fold slightly more than the allowances.
- Fold the exact amount allowed for the seam.
- Fold slightly less than its normal size.
- Make sure that the seams hook together.
- Fold slightly less than its normal size.
The first step when completing a grooved seam should be to :
- dress the hooked material down to four metal thicknesses.
- dress the hooked material down using a hand groover.
- dress the hooked material down using a hand groover.
- dress the hooked material down at the proper angle.
- dress the hooked material down to four metal thicknesses.
After the setting of the grooved seam is completed, you must:
- use a smooth hammer to complete the finished seam so that it is smooth and dent-free.
- use a bar folder hammer to flatten the seam.
- use a Noyes Groover.
- use a plastice mallet.
- use a smooth hammer to complete the finished seam so that it is smooth and dent-free.
If you are making this fitting so that the direction of air flow is out through the round collar, the collar should be manufactured as a :
- small end allowance collar.
- large end allowances collar.
- medium-sized collar
- Size does not matter if the collar is crimped
- small end allowance collar.
A squaring shear is rated for 16 gauge mild steel. What is the rating for stainless steel?
20 gauge for stainless steel
When forming or cutting stainless, sheet metal cutting and bending equipment must be de-rated by how many gauges?
De-rated by 4 gauges
Iron dust contamination can cause stainless steel what ?
- Flake
- Rust
- Scale
- Get Dirty
- Rust
Stainless steel has a higher tensile strength. Therefore when bending angles you need to compensate for ______-____ by over bending.
Stainless steel has a higher tensile strength. Therefore when bending angles you need to compensate for SPRING-BACK by over bending.
