Welding, Cutting, Metallurgy And Machining Flashcards
The force to pierce a 1/2 inch hole in a 1/2 inch thick steel plate is what?
40000 lbs
What is the 2 types of milling?
Conventional and non conventional (climb milling)
What type of milling is used for non-ferrous milling?
Climb milling
Find the tap diameter size of 7/8” UNC thread.
49/64”
What type of rod is good for overhead welding?
6010
What causes a hissing sound from a torch tip?
Too much oxygen pressure on a small tip
When working on a lathe and performing a thread cutting operation a lead screw is used. The included angle of these threads are what?
29 °
The visual difference between hot and cold rolled steel is what?
Hot rolled steel has scaly surface
Determine the taper per foot of a 6” diameter shaft taper down to 3” diameter over an 8” span.
9”
Basic procedure to be done prior to cast iron welding is what?
Preheat
A right-angle triangle has a side of 32” and the other 14”. What is the length of the 3rd leg?
A(squared) + B(squared) = C (squared)
34.93 “
What is the procedure to temper carbon steel?
Quench immediately
What is the cutting speed of ft/min for 1/2” drill at 600 RPM?
75
What force is required to pierce a 2” hole in a 1/8” plate?
20 ton
What type of Weld inclusion cannot be seen with the naked eye?
Imbedded slag
Using a 7018 rod what condition reduces hydrogen in the flux and creates porous welds?
Damp flux
What material gives the longest spark in a spark test?
High carbon steel
What valve should be open all the way before lighting a torch?
Oxygen valve on the tank
When mig welding what prevents porosity?
Sufficient gas flow to cover the weld area
A 6010 rod is good for what?
All positions
What does an offset tail stock on a lathe create?
Tapered shaft
What technique is used with 6018 rod in the vertical position?
Wide weave upwards
What should you do after welding a patch on a tank?
Hydrostatic test the welds
HI 👋
Good job! Keep it up.
If a welder catches fire what type of fire extinguisher is used to put out the fire?
Class C
A gusset has a side of 5” in another side of 5” what is the area in square inches of the gusset?
12.5 square inches
What should you do before operating a welding machine?
Check all connections
What is polarity?
Direction of current flow
What does the 70 in a 7018 rod refer to?
Tensile strength in pounds
What is the method of testing materials without breaking them?
Non destructive testing
What would you put on a steel plate prior to scribing a line?
Layout dye
A steel plate measuring 48” x 96” x 1/2 inches weighs roughly how much?
667 lbs
Calculate the volume of a tank with inside dimensions of 32” x 45” x 21”
17.5 cubic ft (LXWXH)= TOTAL ÷ 1728
What should you do after welding a pressure vessel?
Test all welds
What is used for scribing a line on a plate?
Marking/layout dye
How is a file cleaned?
File card
A type of flame is used on a cutting torch?
Neutral
What causes torch backfire?
Tip too close to the work piece
