Math & Measurements
Which value is smaller?
7/8" or 13/16"
Answer = 7/8"
7/8 = 14/16 > 13/16
In order to use an angle grinder safely, what 2 removable parts (that are sometimes missing) are required to be on the tool?
1. Blade guard
2. Handle
This type of welding power source (welding machine) is usually large, and heavy, due to the size of the step-down transformer required for 60 Hz AC.
What is a "transformer" machine?
See Welding Symbol #1
Describe the indicated weld(s)
Groove weld, both sides, size not specified
What is the nominal size (diameter) of a 1/2 - 13 bolt?
1/2 inch
What half of 5/8"?
5/16"
5/8 x 1/2 = 5/16
This hydraulic machine can be used to cut flat bar (FB), angle (L), round bar, used to punch holes and cut notches in sheet and plate.
What is an ironworker?
This type of power source is used for GMAW and FCAW
Constant Voltage or CV
See Welding Symbol #2
Describe the indicated weld(s)
Surfacing Weld, Arrow Side
What type of head markings are found on a Metric bolt of Class 8.8?
8.8
Reference: Bolt Depot PDF, on Canvas
What is 6 ft.2 x 6 =
= 36 ft.2
("36 square feet")
6 square feet x 6 = 36 square feet
(no units on the second 6)
Which one of our fabrication machines does this Make/model name describe?
Ercolina Top Bender TB60
Rotary draw bender
(Tubing Bender)
Seen on some welding power sources, what does this symbol mean?
~
AC or Alternating Current
Welding Symbol #3
Describe the indicated weld(s)
U-Groove Weld, Arrow Side, Machine Flush
US bolt diameters under 1/4" are given as this...
Numbers (e.g. #12) instead of inches, in order of increasing size.
Reference: Bolt Depot PDF, on Canvas
What is the formula for the circumference of a circle?
A = 2 x pi x r
(Area = 2 x pi x radius)
or
A = Diameter x pi
This machine (2 possibilities) is used bend thin sheet into short lipped trays and boxes.
Finger brake
Mag brake
What does FCAW-G stand for?
Flux Cored Arc Welding - Gas Shielded
See Welding Symbol #4
Describe the indicated weld(s)
Bevel Weld, Arrow Side, 1/4 inch bevel, 5/16 inch weld size
These drive types are resistant to cam-out (stripping) and can be installed single-handed.
What is Torx and Square drive
Reference: Bolt Depot PDF, on Canvas
This shop formula used to find the bend length of a portion of a circle, given the CLR (Center Line Radius) and degree of bend. (Say for a piece of bent tubing)
BL = CLR x DEG x .0175
Bend Length=Center Line Radius x Degrees x .0175
This machine is used to cut complex parts from sheet and plate, has a computer interface and requires drawing files to be in DXF format.
What is a CNC plasma cutter?
On Millermatic 252 welding machines (GMAW), can you adjust the gas pre-flow and post flow?
Yes!
It's on a hidden menu, accessed by holding the trigger and turning the machine on. RTFM
See Welding Symbol #5
Describe the indicated weld(s)
Staggered intermittent fillet weld, 1/4" leg size, 3" on 10" centers
What does RTFM mean?
Read The Full Manual