Deck 7: Flame Cutting

Question 1

If an excessive amount of preheat flame is used, ____.

A) the cutting stream may gouge the side of the cut
B) the top edge may be melted or rounded off
C) the cut may be incomplete
D) the sides of the kerf may be dished

Answer 1

B

Question 2

The space produced during the cutting process is the ____.

A) coupling distance
B) cut gap
C) kerf
D) drag

Answer 2

C

Question 3

If a large cutting tip pops when the acetylene is turned off, ____.

A) turn the oxygen off first
B) turn the acetylene back on
C) it is defective and must be discarded
D) it must be repaired

Answer 3

A

Question 4

If the cutting stream is too fast, ____.

A) the cutting stream may gouge the side of the cut
B) the top edge may be melted or rounded off
C) the cut may be incomplete
D) the sides of the kerf may be dished

Question 5

____ is produced by the metal as it burns.

A) Carbon
B) Iron
C) Heat
D) Ash

Question 6

When a left-handed welder is making a cut with a hand torch, the torch should be braced ____.

A) with the left hand
B) with both hands
C) with a clamp
D) with the right hand

Question 7

Which of the following determines the amount of preheat flame required to make a cut?

A) Arc length, material thickness, and cutting tip diameter
B) Amperage, cutting tip diameter, and type of fuel gas
C) Material shape, arc length, and amperage
D) Type of fuel gas and material thickness, shape, and surface condition

Question 8

A machine cutting torch is sometimes referred to as a(n) ____.

A) portable cutting torch
B) line burner
C) hand torch
D) combination torch

Question 9

If the cutting tip seat or the torch head seat is damaged, ____.

A) it must be discarded
B) it can be repaired using a plastic hammer
C) it can be repaired using a reamer
D) it can be cut apart and welded back together

Question 10

When removing a cutting tip, if the tip is stuck in the torch head, ____.

A) cut off the tip and discard it
B) discard the torch head
C) tap the back of the head with a plastic hammer
D) tap the side of the tip with a plastic hammer

Question 11

If a cut is to be started in a place other than the edge of the plate, ____.

A) the inner cones should be held as close as possible to the metal
B) the inner cones should be as far as possible from the metal
C) hold the torch at a right angle and pointing slightly away from the plate
D) hold the torch at a 45 degree angle, pointing slightly toward the plate

Question 12

The kindling temperature of iron is ____.

A) 600 degrees Fahrenheit
B) 1000 degrees Fahrenheit
C) 1200 degrees Fahrenheit
D) 1600 degrees Fahrenheit

Question 13

Most cutting tips are made of ____.

A) copper alloy
B) stainless steel
C) cast iron
D) nickel alloy

Question 14

Which of the following metals are easy to cut using oxyfuel gas cutting?

A) high nickel steels
B) cast iron
C) stainless steels
D) steel with less than 0.3% carbon

Question 15

When metal is burned away, ____.

A) oxygen forms an iron oxide
B) oxygen forms iron dioxide
C) the iron turns to cast iron
D) the iron turns to oxygen

Question 16

The mixing chamber may be located in ____.

A) the torch body or the tip
B) a separate location in the welding shop
C) the portable mixing machine
D) the oxygen tube

Question 17

Acetylene is used in tips having ____ preheat holes.

A) one to three
B) one to six
C) three to five
D) three to eight

Question 18

To start a cut on the edge of a plate, ____.

A) hold the torch at a 45 degree angle
B) hold the torch at a right angle or pointed slightly away from the edge
C) point the torch toward the edge
D) hold the torch at a 10 degree angle, pointed away from the edge

Question 19

The ____ determines the thickness of the metal that can be cut.

A) arc length
B) current
C) cutting tip diameter
D) fuel gas

Question 20

The number of preheat holes determines the ____.

A) amount of preheat flame required
B) type of fuel gas to be used
C) arc length
D) kindling temperature

Question 21

​When mild steel is cut, it forms a light gray colored oxide which primarily consists of ____.

A) ​Fe2O3
B) ​Fe3O4
C) ​Fe2O6
D) ​Fe4O8

Question 22

​What is an advantage of having two oxygen regulators on a machine-cutting torch?

A) ​It allows the cutting pressure to be adjusted without affecting the torch flame.
B) ​It makes it easier to light the torch.
C) ​It allows air to be used instead of oxygen for the flame.
D) ​It makes it possible to change cylinders during a cut without stopping the cut.

Question 23

​What does the term kindling temperature mean?

A) ​It is the temperature at which rapid oxidation occurs.
B) ​It is the temperature at which a metal begins to vaporize.
C) ​It is the temperature when the alloys of metal begin to combine.
D) ​It is the temperature when metal begins to glow bright white.

Question 24

The distance that the bottom of the cut is behind the top is known as the ____________________.

Question 25

____ contains little or no unoxidized iron.

A) Soft slag
B) Hard slag
C) Magnesium
D) Zinc

Question 26

​Which organization has a standard numbering system for sizing cutting tips?

A) ​American Welding Society
B) ​OSHA
C) ​National Bureau of Standards
D) ​There is no standard

Question 27

​All pressure regulators _______.

A) ​can only be attached to a single type of gas
B) ​reduce the high cylinder or system pressure to the proper lower working pressure
C) ​are single or dual stage types
D) ​All of the above

Question 28

​What are some of the various oxyfuel cutting specialties that can be found on a job?

A) ​flame cutting
B) ​gouging
C) ​beveling
D) ​All of the above

Question 29

____ is when metal bends or twists out of shape as a result of being heated during the cutting process.

A) Hardening
B) Bending
C) Dishing
D) Distortion

Question 30

If ____________________ is used in tips designed for other fuel gases, the tip may overheat.

Question 31

The ____________________ may require two oxygen regulators, one for the preheat oxygen and the other for the cutting oxygen stream.

Question 32

The distance from the inner cones of the flame to the surface of the plate is known as the ____________________ distance.

Question 33

​How is a welding tip seal checked for a leak?

A) ​Place your finger over the end of the tip and spray the fitting with a leak detector.
B) ​Once the tip is tight, use a wrench to make ½ additional turn.
C) ​Put the cutting head in the cooling tank and look for bubbles.
D) ​Clean the fitting with a dry clean rag, and tighten the fitting with a 12 in.adjustable wrench.

Question 34

If the pressure setting is too high, ____.

A) the cutting stream may gouge the side of the cut
B) the top edge may be melted or rounded off
C) the cut may be incomplete
D) the sides of the kerf may be dished

Question 35

When cutting pipe freehand, if the pipe is larger than three inches in diameter, ____.

A) the torch tip is always pointed away from the center of the pipe
B) the torch tip is always pointed toward the center of the pipe
C) the torch tip is held straight up and down
D) the torch tip is held straight down

Question 36

​Combination cutting and welding sets are often used in ____________.

A) ​auto body shops
B) ​small welding shops
C) ​schools
D) ​All of the above

Question 37

​Why is the oxygen turned on for a moment after a tip is cleaned?

A) ​To make sure the tip has been cleaned enough.
B) ​To blow out any material loosened during the cleaning.
C) ​So that you can check for leaks.
D) ​All of the above

Question 38

​What color should most steels be at before a cut is started?

A) ​bright red
B) ​white
C) ​dull red
D) ​yellow hot

Question 39

In a cutting torch, ____________________ is mixed with the fuel gas to form a high-temperature preheating flame.

Question 40

Most hand torches will not easily cut metal that is more than ____ inches thick.

A) three to five
B) five to seven
C) seven to ten
D) ten to twelve

Question 41

The ____________________ is the lowest temperature at which a material will burn.

Question 42

____________________ slag is very porous, brittle, and easily removed from a cut.

Question 43

Explain the chemistry of a cut.

Question 44

When cutting ____________________ diameter pipe, the torch tip is held straight up and down and moved from the center to each side.

Question 45

____________________ slag is attached solidly to the bottom edge of a cut and requires chipping and grinding to remove.

Question 46

Describe how the welder should be positioned when hand cutting.

Question 47

When cutting ____________________ diameter pipe, the torch tip is always pointed toward the center of the pipe.

Question 48

Explain why a cutting torch should never be used to open a used can, drum, tank, or other sealed container.

Question 49

Explain the difference between soft slag and hard slag.

Question 50

Explain what distortion is, and how it can be prevented.