Welding

Question 1

what is welding

Answer 1

a joining process between 2 or more parts become 1 at the contact surface

Question 2

what are the limitations of welding

Answer 2

most operations are preformed manually
ustlilize high energy/ dangeourous
causes permanent bonds
can have defects that are difficult to detect
need to be cleaned well to get good welds

Question 3

what are some of the ways welding can be dangerous

Answer 3

high tempurature of metals
feuls are a fire/explosion hazard
electriclal shock
UV radiation emitted in arc welding is harmful

Question 4

what are the 5 types of welded joints

Answer 4

butt
corner
lap
tee
edgeq

Question 5

what is fillet welds

Answer 5

the most common type in arc/oxyfeul welding

Question 6

what are groove welds

Answer 6

welds that require edges of the parts to be shaped into a groove

Question 7

what are plug/slot welds used for

Answer 7

filling holes/slots in the top plate

Question 8

what are the 2 types of welding processes

Answer 8

fusion
solid state

Question 9

what are the parts of a fusion weld

Answer 9

fusion zone
weld interference
heat affected zone

Question 10

what is arc welding

Answer 10

coalesence of material sis achieved by the heat from an arc between an electrode and the peice

Question 11

what are the 2 types of arc welding electrodes

Answer 11

consumable
non conconsumabel

Question 12

what is the diference between a consumable / non consumable electrode

Answer 12

consumed- a sourse of filler
non consumable- filler metal must be added sepretly

Question 13

what is flux

Answer 13

a substance that prevents formation of oxides and other contaminates

Question 14

What is Sheilded Metal Arc Welding (SMAW)

Answer 14

uses consumable electrode
also called stick welding

Question 15

What is Gas Metal Arc Welding (GMAW)

Answer 15

uses consumable barw metal wire as an electrode
known as Metal inert Gas

Question 16

what is Gas Tungsten Arc Welding (GTAW

Answer 16

uses non consumaable tungsten welding
also called tig welding

Question 17

Whats is Resistance welding

Answer 17

a process that uses the combination of heat and pressure to accomplish coalescencse

Question 18

What is resistance Spot welding (RSW)

Answer 18

fusion of a lap joint is acheived using opposing electrodes

Question 19

what is Resistance seam welding (RSEW)

Answer 19

similar to spot welding but the rod shaped electrodes are replaced with rotating wheels

Question 20

What is Oxyfeul Gas Welding (OFW)

Answer 20

burns various feuls mixed with oxygen

Question 21

what is oxyacetylene weldingg (OAW) a

Answer 21

uses a high temprature flame from the combustion of acetylene and oxygen to preform welding

Question 22

What is Solid state welding (SSW)

Answer 22

coalsencse of part surfaces os acheived by pressure alone using diffusion to bond the material

Question 23

what are the 8 types of solid state welding

Answer 23

forge
cold
roll
hot pressure
diffusion
explosion
frictuon
ultrasonic

Question 24

what is forge welding

Answer 24

components joined by being heated to their hot working tempurature then forged together by hammering

Question 25

what is cold weling

Answer 25

applying high pressure between ckean contacting surfaces at room teempurature

Question 26

what is roll welding

Answer 26

coalsense is applied by means of rolls either with or without external heat

Question 27

what is explosion welding

Answer 27

used to bond to disimilar metals

Question 28

what is friction welding

Answer 28

coalesense achieved by frictional heat combined with pressure

Question 29

what is ultrasonic welding

Answer 29

components are held together under a modest clamping force and ultrasonic frequency is applied

Question 30

what are the 8 types of welding defects

Answer 30

cracks porosity undercut slag inclusion overlap incomplete fusion incomplete penetration splatter

Question 31

what are the 3 types of inpection for welds

Answer 31

visual non destructive destructive

Question 32

what is visual testing for welding

Answer 32

examiner looks at weld and can only detect surface cracks

Question 33

what are some types of nondestructive testing methods/what can they detect

Answer 33

dye penetrent- surface cracks/cavities magnetic particle testing- can only test on ferrous parts ultrasonic testing-defecrs detected by loss of sound transmission radiographic testing-uses x-rays to detect flaws

Question 34

whaat ate some tpes of destructive testing

Answer 34

mechnical tests (tensile/shear) metallurgical

Question 35

what are the factors that effect weldability

Answer 35

welding process base metal properties filler metal surface condidtion