Flashcards in 2020-2021 Deck (38)
Eyes are delicate and can be easily burned by welding flash. Flash consists of what tires of light rays?
Ultraviolet and infrared
Welding shield (also called welding helmets) provide eye and face protection. The welder looks through a window that contains a glass filter plate. The recommended shade of the filter plate for smaw is ___.
10 or 11
What type of electricity flows in more than one direction?
The voltage and current required to run a smaw machine can be supplied by _____.
Power lines or engine-driven alternators or generators
The device in a smaw power source that changes AC to DC is known as a(n)______.
What type of power source yields a small welding current change when there is a large arc voltage change?
Constant current power source
The percentage of a ten minute period that a power source operates at is rated output current setting is the machines ______
The majority of smaw welding is done using direct current electrode positive(dcep). This is also known as
The electrode holder and cable are often referred to as the ______
A DC power source that is turned off and on at very high speeds is known as an inverter that is using ____technology
Which of the following is NOT a variable that will affect travel speed?
Temperature of the weld
When determining electrode amperages, be sure to consider_____.
Position of the weld
The two basic techniques to start an arc are_____.
Scratch and strike
Most of the smaw weld applications encountered will ______beads when welding a single pass weld or on the first pass of a multiple pass weld.
For centuries, the only method used for metllurgically joining metals was ____welding
An innovation in 1932 placed a heavy layer of ____on the seam ahead of the carbon electrode.
Smaw is a process for joining metals that used a _____.
Flux covered electrode
A joint made by overlapping one piece of material over another is a____joint.
The place at which the face of the weld and the base metal surfaces meet is called the ____.
Lap joints may be used to splice _____.
Quickly with minimum joint preparation
A limitation of T-joint is ______.
Stress concentration at the joint root increased the risk of fatigue cracking
What does a welding symbol include to show the location of a weld
The back and backing weld symbols are ____.
Always wear ___.
If it is necessary to couple lengths of cable together, make sure joints are ____.
Do not hold the welding or cutting to too close to your work; this will cause a(n)____.
Never leave your torch ____and go away from it
Do not store cylinders in a room where the temperature is more than _____degrees Fahrenheit
On which of the following metals should you always use air exhaust at the weld?