P2 Oxy Fuel Gas Cutting Review

Front 1

The oxy fuel process works by combining

Back 1

Iron with oxygen to form iron oxide

Front 2

Oxy fuel cutting is considered

Back 2

Rapid oxidization

Front 3

Carbon steel can be preheated to temp above

Back 3

1600 F

Front 4

Molten metal blown away, a narrow opening is called

Back 4

Kerf

Front 5

Oxy fuel is mainly restricted

Back 5

Iron based metals

Front 6

The smaller holes on a cutting torch tip form the

Back 6

Pre heat flames

Front 7

Larger hole in center of tip is where

Back 7

High pressure oxygen flows through

Front 8

Removing a nut without damaging the bolt

Back 8

Washing

Front 9

Removing a narrow strip is called

Back 9

Gouging and scarfing

Front 10

Prepare a U groove you need a

Back 10

Special gouging tip

Front 11

Process that removes thin layer from a thicker section

Back 11

Flame scarfing

Front 12

Manual cutting can cut up to

Back 12

24 inches thick

Front 13

An oxygen lance will cut up to

Back 13

8 feet thick

Front 14

Cutting with a small carbon steel pipe that is attached to supply of oxygen

Back 14

Oxygen lance cutting

Front 15

Several layers stacked and cut

Back 15

Stack cutting

Front 16

Cutting cast iron it is recomended that you

Back 16

Preheat

Front 17

an effective way to cut high carbon and alloy steel is to clamp a

Back 17

low carbon steel plate

Front 18

when cutting alloy steel you should use a slight

Back 18

semi circular motion

Front 19

what are considered better processes for cutting non ferrous alloys?

Back 19

plasma arc and air carbon arc

Front 20

iron must be present for

Back 20

oxidization to occur

Front 21

a problem when cutting sheet metal will likely be

Back 21

bulking and warping

Front 22

distortion can be minimized by

Back 22

preheating

Front 23

stack cutting and intermittent cutting can help reduce

Back 23

distortion

Front 24

when cutting medium and high carbon steel what can be caused due to too much heat

Back 24

hardening is often a problem

Front 25

the best way to avoid surface hardening is to slow the rate of

Back 25

cooling

Front 26

cutting materials 1 inch to 6 inch thick what shade should be used

Back 26

4 or 5

Front 27

if a torch makes a loud popping noise

Back 27

backfire

Front 28

three cause of a torch backfire

Back 28

1. touching torch to workpiece

2. overheating torch tip

3. not enough gas flow

Front 29

aside from fire damage a _____ can also result in a explosion

Back 29

flashback

Front 30

after flashback your equipment will usually need

Back 30

Repair and replacement

Front 31

_____ is a coating on galvanized material that is toxic to breath in

Back 31

zinc

Front 32

a material used as rust inhibition on steel can produce deadly fumes when heated

Back 32

cadmium

Front 33

if oil and greae is brought into contact with pure ____ a violent explosion can occur

Back 33

oxygen

Front 34

a mega pascal is _____ times larger than kilopascal

Back 34

1000

Front 35

the chemical symbol for acetlyne is

Back 35

C2H2

Front 36

acetylene burns at an extremely high

Back 36

temperature

Front 37

when acetylene and oxygen is mixed temperatures can reach up to

Back 37

6300 F

Front 38

critical point of a acetylene is

Back 38

28 psi at 70 F

Front 39

acetylene cylinders are filled with porous material

Back 39

balsa wood

Front 40

acetylene cylinders when filled contain how much pressure

Back 40

250 psi

Front 41

copper and acetylene react together to form

Back 41

acetylide which can cause an explosion

Front 42

natural gas is used in areas where

Back 42

it can be piped in

Front 43

with natural gas, cutting speeds are

Back 43

slower than with acetylene

Front 44

the fuel that is stored in liquid form under high pressure is

Back 44

Mapp gas

Front 45

cutting with fuel code name Apache your cutting with

Back 45

propylene

Front 46

oxygen is available as a gas in ______ or as a liquid form in ______

Back 46

high pressure cylinders and cryogenic

Front 47

the two most common types of oxygen cylinders are T type which holds up too 2600 psi and the K type which holds up to 2200 psi

Back 47

T type - 2600 psi

K type - 2200 psi

Front 48

at 21 degrees C the pressure in a full K type oxygen bottle would be

Back 48

2200 psi

Front 49

the high pressure oxygen cylinder valved is made out of forged

Back 49

brass

Front 50

the cylinder valve of an oxygen cylinder is a

Back 50

double seal construction

Front 51

if the pressure inside an oxygen cylinder gets too high, a

Back 51

rupture disk will burst

Front 52

pressure in which oxygen bottles will vent at

Back 52

4000 psi

Front 53

boiling point of oxygen is

Back 53

-183 C

Front 54

cyrogenic containers have

Back 54

pressure relief valves as a safety device

Front 55

acetylene containers have

Back 55

fusable plugs

Front 56

an acetylene pressure regulators has much _____ calibration range than an oxygen regulators

Back 56

lower

Front 57

the gauge with the higher numbers show the

Back 57

cylinder pressure

Front 58

the gauge with the lower numbers shows the

Back 58

working pressure

Front 59

the most widely used type of regulator for everyday cutting and welding is the

Back 59

single stage regulator

Front 60

the most common sized hose for light duty cutting is

Back 60

1/4 inch

Front 61

all fitting connectors are made out of

Back 61

brass

Front 62

never use ____ or ______ fittings for tubing on acetylene gas systems

Back 62

copper or red brass

Front 63

a combination torch can be used for

Back 63

welding and cutting

Front 64

a heating tip does not have

Back 64

oxygen cutting orfice

Front 65

an acetylene manifold system is filled with _______ to prevent the free actetylene from reaching its critical point

Back 65

stainless steel rods

Front 66

a master pattern for cutting irregular shapes is

Back 66

template

Front 67

a tracer that uses special tracer ink as a templet is called

Back 67

electronic eye tracer

Front 68

CNC stands for?

Back 68

Computer numerical control

Front 69

Six signs that you have produced a good oxy fuel cut

Back 69

1. Top edge is sharp and straight

2. The surface of the cut in smooth

3. The draglines are vertical

4. Little slag

5. The bottom edge is sharp

6. Square cut

Front 70

One of the most important factors affecting cut quality is

Back 70

Speed of travel

Front 71

When cutting, teflon may be present in what type of material?

Back 71

Pipe

Front 72

What type of steel will have surfacr hardening along edges of kerf

Back 72

Carbinated steel

Front 73

Non ferrous alloys are difficult to cut because they contain

Back 73

Little or no iron

Front 74

A ferrous alloy is one that contains

Back 74

Iron

Front 75

Ferrous alloys are hard to cut cause they produce a ______ on the surface metal

Back 75

Protective oxide

Front 76

Chemical flux cutting is especually useful for cutting

Back 76

Stainless steel

Front 77

Metal powder cutting is a process where a powder containing ____ is injected into the area cut

Back 77

Iron

Front 78

Aluminum cant be cut with oxy fuel cause

Back 78

Does not contain iron necessary for oxidation

Front 79

Iron fumes are extremely toxic

Back 79

False

Front 80

Where might a welder come upon zinc

Back 80

As a coating on sheet metal

Front 81

What happens when a pressure regulator creeps

Back 81

The working pressure increases

Front 82

Which factor determines the size of hose?

Back 82

Length of hose

Front 83

Injector type torches are designed for use with

Back 83

Fuel gases supplied at low pressure

Front 84

Propane gas requires what kind of cutting tip?

Back 84

A specially designed tip

Front 85

What do you do if cylinder is leaking?

Back 85

Dont try and fix it, move to safe place, notify manufactorer

Front 86

Is stainless steel easy to cut with oxy fuel?

Back 86

No cause it has little iron

Front 87

What are you looking for when preheating metal

Back 87

Cherry red

Front 88

Where can you find teflon?

Back 88

On a pipe with teflon tape on its threads, toxic

Front 89

Sheet metal cuts at what degree?

Back 89

10-20 degrees

Front 90

Cutting speed to fast issues

Back 90

Top edge is sqaure

Bottom edge has slag

Curved drag lines

Front 91

Cutting speeds to slow issues

Back 91

Top edge round

Bottom edge uneven

Irregular drag lines