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Pipefitter License > Prep Test > Flashcards

Prep Test Flashcards

1
Q

For pipe sizes up to 12 inches, nominal size is an approximation of the _______ of a schedule 40 pipe.

A

Inside diameter

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2
Q

For pipe sizes 14 inches and more the nominal size is an approximation of the _______ of a schedule 40 pipe.

A

Outside diameter

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3
Q

Which way does a hacksaw cut?

A

Forwards

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4
Q

What stamp is needed to change a valve on a pressure vessel?

A

PP stamp (power piping)

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5
Q

What speed do you thread stainless?

A

Machine has one speed

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6
Q

At what temperature does brazing wire melt?

A

840°F

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7
Q

What is a 10” short radius 90 take out?

A

10”

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8
Q

What is a 10” long radius takeout?

A

15” (1.5x)

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9
Q

What does the stem of a valve attach to?

A

Disc

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10
Q

What part of a valve do you put in a vise to work on it?

A

Bonnet

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11
Q

What part of a valve directly affects flow?

A

Disc

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12
Q

OD 4” carbon steel pipe?

A

4.5”

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13
Q

Tube measures _______ diameter

Pipe measures ________ diameter

A

Tube - OD
Pipe - ID up to 14” then OD

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14
Q

What mixture of gasses is MAPP gas made up of?

A

Acetylene/propane

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15
Q

What tubing bender is the most efficient?

A

Spring compression bender

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16
Q

What is a hickey?

A

Tubing bender made by rigid

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17
Q

What are alternative ways to connect tubing without brazing, soldering or welding to connect pipe without leaking?

A

Flared

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18
Q

What do you NOT use to test high purity pipe?

A

Compressed air

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19
Q

What pipe do you use for the least amount of corrosion?

A

Stainless

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20
Q

What color symbol is used for Type K copper?

A

Green - K

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21
Q

What do you use to prevent flash burn?

A

Safety glasses with the correct tint

22
Q

When taking an on-site quantity performance weld test, what is it testing?

A

Ability to weld & welder operator

23
Q

What temperature does the fusible plug on top and bottom acetylene tank disc rupture?

24
Q

Besides thickness of steel what determines the size of tip for fuel cutting

A

Type of fuel

25
Q

What is the most abrasive saw cut?

26
Q

Category M fluid service falls under what code?

27
Q

What’s another name for a level 18” - 48”?

28
Q

What is the purpose of a foot pedal on a Rigid 300 threading machine?

29
Q

What direction is the pressure on a Y type globe?

A

Bottom of disc

30
Q

When can you safely replace the packing on a valve while under pressure?

31
Q

How do you line up holes in a flange?

A

Drift pins

32
Q

Why do you wear gloves when handeling threaded pipe?

A

Threads are sharp

33
Q

After threading a pipe, what would you do to it to make it into a fitting?

34
Q

With a process piping license, can you work in a steam power plant on high pressure steam?

35
Q

Which test position qualifies a welder to weld in all positions?

36
Q

You arrive at work and find a ladder is broken, what is the first thing you should do?

A

Remove from Service and clearly mark

37
Q

If the packing nut was loose what part of the valve would leak.

38
Q

What is the function of a Pressure Relief Valve?

A

A valve designed to open automatically to relieve pressure and keep it below designated level.

39
Q

CMR 522.16 Temp controls, where would those controls be placed on a boiler?

A

Any extra outlet in boiler

40
Q

Can you have a close nipple between PSV and a boiler?

A

Yes, unless it is a 3” fitting and the boiler exceeds 15 PSIG, in that case it must be a flanges connection

41
Q

How much bigger is the outlet of a PSV than the inlet?

A

One pipe size larger

42
Q

The minimum size for blow-off piping lbs boiler?

43
Q

The maximum size blow-off piping for a boiler

44
Q

Name 5 joints used with steel pipe.

A

Butt weld, socket weld, compression, threaded, flanged

45
Q

Where would you find a strainer installed?

A

Before a control valve or a check valve, before a pump.

46
Q

What are 3 things steam traps do?

A

1) removes air or gases and condensate
2) responds to load and pressure change
3) closes before passing live steam

47
Q

What restrictions are there in connections to a boiler vessel?

A

Welded connections not larger than 2” NPS

Threaded, studded or expanded connections hole not larger than 2” NPS

48
Q

List 4 locations a steam trap would be installed in a line.

A
  • drip line
  • discharge piping
  • exhaust pump suction piping
  • pump discharge piping
49
Q

When blowdown piping is below 100 psi what is it made of?

A

Bronze, ductile, cast iron, steel or malleable iron

50
Q

When blowdown piping is above 100 psi what is it made of?

51
Q

What is the symbol for a boiler?

52
Q

What is the max dice of a threaded pipe on the power s of a boiler

A

2.5” NPS

Pipefitter License (10 decks)

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