welding Flashcards
Which lens shade is recommended for low to medium amperage arc welding?
10 lens
All eye injuries should be treated by?
Medical doctor only
When cutting, welding or grinding around equipment or or your fellow worker’s you should do what?
Erect screensto stop sparks,slag and light rays.
When welding must be performed on machinery, you can protect the bearings by doing what?
Placing the ground clamp as close as possible to the weld.
A welding machine rated at 300 amps and a 60% duty cycle can produce for?
A 300 amps for only 6 minutes out of every 10 minutes of operation.
In order to set the dc welding machine to run with reverse polarity, you must hand it set up?
The electrode connected to the positive terminal and the ground connected to the negative terminal
What is the main reason for the coating on a stick electrode rod?
To produce an inert atmosphere that protects the molten weld pool.
In the AWS electrode classification system the first two numbers of E6010 represent?
The tensile strength in thousands of pounds per square inch.
In the CSA classification system the the fourth number of E41010 designates?
The electrode may be used in all positions.
Where should you store low hydrogen electrodes when removed from their packaging before use?
In a rod oven at minimum temperature of 120°c (250F)
What’s SMAW Stand for?
Small metal arc welding.
What’s GMAW stand for?
Gas metal arc welding. And it’s mig.
The 3 types of constant current power sources are?
1 Transformers(AC) 2inverts (recterfiers) 3 generators (DC)
Welding cable size numbers mean?
The bigger the number the smaller the gauge wire.
Are otts bigger than the numbers or smaller than?
Otts are bigger than numbers and look like this 1/0,2/0,3/0,4/0 and numbers from 1,2,3,4 for meaning the smallest
