Fuel/Gas Cutting and Welding Flashcards
The size of a gas cylinder is measured in what units?
Cubic Feet
Acetylene cylinders are packed with a porous material saturated with ________, used to absorb a large
quantity of acetylene under pressure.
Acetone
Oxy-acetylene system design restricts the oxygen line from being placed in the acetylene side by
making the threads of the acetylene connections left handed
. Which type of flame will have an “acetylene feather”, indicating that more oxygen needs to be added
Carbonizing
When cutting with oxy-acetylene, what is the common reason for a rough edge and uncut material?
Travel Speed too Fast
When piercing plate or pipe, approach the material surface at a _________ angle.
45 degree
A braze weld color that is darker than the original brazing rod is an indication of
too little heat or too fast a travel speed
When cutting with a hacksaw, select a blade tpi size that allows at least ______ teeth to contact the
material at one time.
Three
The hole size for a tap is typically _______ than the tap size for course threads.
1/16 Inch
Adjust the tool rest of a stationary grinder within _________ of the wheel
1/16 Inch
Annealing means to ____.
heat metal to a high temperature and cool very slowly
The purpose of the flux coating on an electrode is to ___
Protect the weld from oxygen
All SMAW welding machines are constant current; this means they
provide an even supply of amperage to the electrode
A machine’s ____ is a rating that indicates how long the machine can continuously operate at a given
amperage during a ten-minute period without overheating
Duty Cycle
What is Slag?
weld waste and impurities that form at the top of the weld bead
