welding

Question 1

when heat alone is used to melt and flow metal together, the process is known as…

Answer 1

fusion welding

Question 2

welding by heating and then forcing the pieces together is called…

Answer 2

pressure welding

Question 3

the form of arc welding that uses flux-coated welding rods is called

Answer 3

shielded metal arc welding

Question 4

gases such as helium and argon. which are used to shield the liquid metal during welding, are called

Answer 4

inert gases

Question 5

the flame from an oxyacetylene welding torch burns at about

Answer 5

6000 degrees

Question 6

the metal that is melted from the pieces being joined is called

Answer 6

weld metal

Question 7

metal added to fill the welded joint is called

Answer 7

filler metal

Question 8

when full, oxygen tank pressure can be as high as

Answer 8

2200 psi

Question 9

acetylene tank pressure, when full, is about

Answer 9

250 psi

Question 10

when opening the oxygen tank valve, how far should it be opened?

Answer 10

all the way

Question 11

when opening the acetylene tank valve, how far should it be opened?

Answer 11

1/4 turn

Question 12

what devices control the welding gas pressure delivered to the welding torch?

Answer 12

gas pressure regulators

Question 13

acetylene gas is unstable when compressed against itself at pressures higher than

Answer 13

15 psi

Question 14

what color hose is always used to connect the acetylene regulator to the welding touch?

Answer 14

red

Question 15

an oxyacetylene torch should never be lit with a …

Answer 15

match

Question 16

for most welds, what kind of oxyacetylene flame is used?

Answer 16

neutral

Question 17

a flame that is burning too much acetylene is called

Answer 17

carburizing

Question 18

to turn off a lighted oxyacetylene torch, which torch valve should be closed first?

Answer 18

acetylene

Question 19

a welding electrode that comes covered with materials that melt to protect the weld metal from the air during shielded metal arc welding is called a

Answer 19

coated electrode

Question 20

what is the approximate tensile strength of an E6013 electrode

Answer 20

60,000

Question 21

arc welding can produce temps as high as

Answer 21

10,000

Question 22

unless protective clothing is worn, arc welding will cause skill burns much like obtained from

Answer 22

the sun

Question 23

a weld bead made without weaving the electrode side to side is called

Answer 23

stringer bead

Question 24

name the two kinds of electric current used for arc welding

Answer 24

A C D C

Question 25

during arc welding, protective clothing must be worn for protection against what two kinds of burns

Answer 25

spatter & inferred ultraviolet

Question 26

name two methods of starting an arc with a coated electrode

Answer 26

scratch or tap

Question 27

name the 5 different types of welds

Answer 27

butt
joint
lap
corner
t

Question 28

name the four basic welding positions

Answer 28

over the head
flat
horizontal
vertical