welding test 2

Question 1

what is the term for the width of the cut produced by any cutting process

Answer 1

Kerf

Question 2

which fuel gas can be used to cut low carbon steel

Answer 2

All of the above

Question 3

The maximum recommended safe safe working pressure for acetylene

Answer 3

15

Question 4

which oxyacetylene flame has an excess of fuel

Answer 4

carburizing

Question 5

the oxyfuel process uses oxygen and what other types of gasses

Answer 5

flamable gas

Question 6

to ensure that oxyfuel lines are not improperly connected, fuel gas hoses are

Answer 6

red with left hand thread

Question 7

a fully charged acetylene cylinder contains approximately

Answer 7

225 psi @70 F

Question 8

while cutting with acetylene, the oxygen working pressure is

Answer 8

greater than the acetylene working pressure

Question 9

while flame cutting, the preheat flames (with the cutting jets open) should be

Answer 9

neutral

Question 10

oxyacetylene torch can cut

Answer 10

carbon steel

Question 11

if an excessive amount of preheat is used when making an oxyfuel cut, the

Answer 11

top edge may be melted or removed

Question 12

it is not necessary to wear shaded lenses when oxyfuel cutting, because it uses a flame instead of an electric arc

Answer 12

false

Question 13

acetylene can be used with oxyfeul cutting tip

Answer 13

false

Question 14

mechanized OFC is commonly reffered to as a track burner

Answer 14

true

Question 15

during the mechanized OFC process there is no need for the operator to monitor the cut being made

Answer 15

false

Question 16

a good quality cut will have drag lines that do not slant or curve backwards

Answer 16

true

Question 17

the most common cause of the top edge being melted away during a cut is travling too fast

Answer 17

false

Question 18

in plasma arc cutting the term plasma refers to

Answer 18

a gas which has been heated to the point that is will conduct electricity

Question 19

while using the pac proccess the air must be

Answer 19

completly dry

Question 20

what is the metallic residue from a plasma cut called

Answer 20

dross

Question 21

during a plasma cut the temp of the arc is approximately

Answer 21

43000

Question 22

what material gives off toxic zinc fumes when plasma cutting

Answer 22

galvanized steel

Question 23

a plasma arc cutting power supply must be able to produce

Answer 23

DC

Question 24

The electrodes for plasma arc torches are made from

Answer 24

tungsten

Question 25

pac will not work on aluminum because aluminum is non magnetic

Answer 25

false

Question 26

a high travel speed with plasma cutting will results in heat input that is much higher than that produced by oxyfuel cutting processes

Answer 26

false

Question 27

pac produces a large quanity of fumes are potential hazards

Answer 27

true

Question 28

the width of a pac cut is narrower than an oxyfuel cut

Answer 28

true

Question 29

when using pac there is no need to worry about excessive flying sparks

Answer 29

false

Question 30

one should always use the proper filter plate shade number when using pac process

Answer 30

true

Question 31

becuse plasma arc cutting is so much faster than oxyfuel cutting there is no time for material to get hot

Answer 31

false

Question 32

one should never operate the pac process if there is moisture on or around the equipment

Answer 32

true

Question 33

when using cac-a the molten metal is removed by

Answer 33

a jet air passing through the arc

Question 34

what amount of air pressure is normaly supplied to a heavy-duty air carbon arc electrode holder

Answer 34

80 to 100 ponds per suare inch

Question 35

while preforming air carbon arc cutting a carbon mixture or _____ electrode can be used

Answer 35

copper coated graphite