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(SW2) BIBS MAR2024 > Gas Cutting(SB-4) > Flashcards

Gas Cutting(SB-4) Flashcards

1
Q

What portion, if any, of a ferrous metal becomes oxidized during the oxygas cutting process?

A

portion directly in the path of the oxygen jet

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2
Q

(True or False) Metals that oxidize readily are best suited for oxygas cutting.

A

false

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3
Q

(True or False) The principal difference between a standard cutting torch and an oxygas welding torch is that the cutting torch has an extra tube for high-pressure oxygen.

A

true

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4
Q

What type of problem(s) can occur during their use if the cutting torch tips and seats are not properly matched and assembled?

A

improper cooling, gas flow, leakage, aota

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5
Q

What action should you take to keep cutting tips in proper working order when they are not in use?

A

store them in container with wooden rack

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6
Q

Which of these basic types of MAPP tips do Steelworkers often use?

A

standard pressure only

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7
Q

What can you use as a tool to clean torch tip orifices when a tip cleaner is not available?

A

soft copper wire

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8
Q

(True or False) The FS type of MAPP gas-cutting tip can be used for machine cutting.

A

true

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9
Q

(True or False) When cleaning the orifices of a tip with a cleaner, you should push the
cleaner straight into the orifices and pull it straight out without twisting.

A

true

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10
Q

With which of these tools can you correct slightly belled orifices by wearing down the end of the tip?

A

emery cloth

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11
Q

(True or False) Before starting to cut with a torch, you should inspect the working area and adjacent areas for combustibles that must be removed or covered to keep sparks or slag from igniting them.

A

true

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12
Q

What device is used to ignite a cutting torch?

A

spark igniter

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13
Q

What type of flame should you use to cut steels that produce a lot of slag?

A

carburizing

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14
Q

What distance in inches should you maintain between the preheating flame and the surface of the metal when using the cutting torch to preheat a mild-carbon steel plate?

A

1/16

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15
Q

How should the shower of sparks fall when you have started a cut properly and the cut is going all the way through the material?

A

opposite side of the material

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16
Q

Which of the following actions can save time when you need to cut a round piece of metal stock with a cutting torch?

A

chiseling a small burr at the starting point on the stock

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17
Q

What type of flame is best for piercing holes in plate?

A

oxidizing

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18
Q

One 70-pound MAPP cylinder can accomplish the work of more than _____ 225-cubic-foot acetylene cylinders.

A

6 and a half

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19
Q

What error are you making when cutting metal plate with an oxygas torch and you cause the top surfaces of the kerf to fuse?

A

advancing the torch too slowly

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20
Q

What effect does moving the cutting torch too fast have on the material during the cutting process?

A

oxidizing flame fails to penetrate completely

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21
Q

In what direction should the tip be angled when cutting a piece of steel 1/8 inch thick?

A

in line with direction of travel

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22
Q

When, if ever, can you place your cutting torch almost vertical to the surface for cutting?

A

cutting steel that is over 1/8 inch thick

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23
Q

When cutting steel greater than 1/8 inch thick, you position the torch so the preheat flames are from 1/16 to 1/8 inch from the plate. You then hold the flame at this position until the steel becomes _____ red.

A

cherry

24
Q

(True or False) To start a cut quickly in thick plate, you should hold the cutting torch so it slants toward the direction of travel.

A

false

25
Q

(True or False) One way you can commence a starting cut is to place an iron filler rod at
the edge of a thick metal plate and begin preheating it.

A

true

26
Q

When cast iron is being cut, what is the preheating temperature?

A

500

27
Q

Which of these tasks are you accomplishing by varying the speed of travel, the oxygen
pressure, and the angle of a large orifice, and by using a low-velocity-jet cutting tip on thesurface of a metal plate?

A

creating gouging countours

28
Q

Which of these actions using a cutting torch can result in a deep, wide gouge on a metal
plate?

A

moving the torch too slow

29
Q

When cutting bevels on a plate instead of cutting straight through on the same plate, you must use (a)_____ oxygen pressure and (b)______ cutting speed.

A

more pressure, slower speed

30
Q

By what component(s) do you adjust a motor-driven cutting torch up and down?

A

gear and rack assembly

31
Q

By performing which of the following actions can you check the clearance of the torch before cutting when using an electric drive carriage on a straight track?

A

releasing the clutch and freewheeling the carriage the full length of the track by hand

32
Q

In what sequence should you secure the machine after the desired cut with the motordriven cutting torch is completed?

A

turn off oxygen, then flame, then current

33
Q

Which of the following actions should an inexperienced operator perform to obtain a smooth bevel on heavy pipe with an oxygas cutting torch?

A

cut the pip off square, then cut bevel

34
Q

(True or False) When cutting pipe, you should always keep the torch pointed toward the centerline of the pipe.

A

true

35
Q

What condition can develop if you do not cut out the punch marks used to mark an outline when fabricating a T-fitting from pipe?

A

cracking

36
Q

What is the desired distance relative to the preheating cones and the metal surfaces when you use the cutting torch to pierce holes in a steel plate?

A

cones are 1/4 inch above metal

37
Q

What procedural step should you take just before slicing off a portion of the head when removing a rivet from a plate with a cutting torch?

A

cut a slot in the rivet head

38
Q

What type of cutting tip with a large diameter cutting oxygen orifice is considered best suited for cutting buttonhead rivets and removing countersunk rivets?

A

low velocity

39
Q

How can you prevent the strands of rope from unlaying when cutting wire rope with a torch?

A

wrap the wire roupe with seizing wire on each side

40
Q

What action should you take before cutting a wire rope with an oxygas cutting torch?

A

fuse the ends to prevent unlaying of the wire

41
Q

Acetylene is extremely dangerous if used above _____ pounds pressure.

A

15

42
Q

What element in an acetylene cylinder can contaminate cutting torch equipment if the
cylinder is not upright when in use?

A

acetone

43
Q

Under what conditions, if any, can you actually rest the cutting tip on the metal you are cutting?

A

never

44
Q

A cast iron kerf is always _____ than a steel kerf due to the presence of oxides and the
torch movement.

A

wider

45
Q

On which metal do you use a semi-circular torch movement along the cutting line?

A

?

46
Q

(True or False) A single-stage regulator’s pressure will decrease as the cylinder pressure decreases.

A

true

47
Q

Which characteristic indicates a good cutting job with an oxygas torch?

A

free of slag, smooth, aota

48
Q

Which characteristics of a drag line indicates proper cutting procedures were followed?

A

short and vertical

49
Q

What minimum distance in feet is permitted between unprotected combustibles and oxygas
cutting equipment that is being used?

A

30

50
Q

Under which of these circumstances can a backfire occur during the operation of an oxygas cutting torch?

A

dirty tip, incorrect pressure, aota

51
Q

What action, if any, should you take to stop a flashback safely with an oxygas cutting torch?

A

close off oxygen first

52
Q

What component(s) of an oxygas cutting torch unit is/are usually responsible for a
flashback?

A

clogged orifices

53
Q

When, if ever, should you weld or cut a container that once held a flammable substance?

A

after cleaning and filling with water

54
Q

What percentage of air space inside a water-filled container should carbon dioxide occupy when it is used in a vessel for additional protection?

A

50

55
Q

What additional safety precaution should you take when doing any hot work on water-filled tanks or containers?

A

vent them

(SW2) BIBS MAR2024 (11 decks)

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