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Pipefitter License > Prep Test > Flashcards

Prep Test Flashcards

(52 cards)

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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?

Study These Flashcards
A

Safety glasses with the correct tint

22
Q

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

Study These Flashcards
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

25
What is the most abrasive saw cut?
Chop saw
26
Category M fluid service falls under what code?
B31.3
27
What’s another name for a level 18” - 48”?
Framing
28
What is the purpose of a foot pedal on a Rigid 300 threading machine?
Safety
29
What direction is the pressure on a Y type globe?
Bottom of disc
30
When can you safely replace the packing on a valve while under pressure?
Never
31
How do you line up holes in a flange?
Drift pins
32
Why do you wear gloves when handeling threaded pipe?
Threads are sharp
33
After threading a pipe, what would you do to it to make it into a fitting?
Pipe dope
34
With a process piping license, can you work in a steam power plant on high pressure steam?
NO
35
Which test position qualifies a welder to weld in all positions?
6G
36
You arrive at work and find a ladder is broken, what is the first thing you should do?
Remove from Service and clearly mark
37
If the packing nut was loose what part of the valve would leak.
Stem
38
What is the function of a Pressure Relief Valve?
A valve designed to open automatically to relieve pressure and keep it below designated level.
39
CMR 522.16 Temp controls, where would those controls be placed on a boiler?
Any extra outlet in boiler
40
Can you have a close nipple between PSV and a boiler?
Yes, unless it is a 3” fitting and the boiler exceeds 15 PSIG, in that case it must be a flanges connection
41
How much bigger is the outlet of a PSV than the inlet?
One pipe size larger
42
The minimum size for blow-off piping lbs boiler?
1”
43
The maximum size blow-off piping for a boiler
2.5”
44
Name 5 joints used with steel pipe.
Butt weld, socket weld, compression, threaded, flanged
45
Where would you find a strainer installed?
Before a control valve or a check valve, before a pump.
46
What are 3 things steam traps do?
1) removes air or gases and condensate 2) responds to load and pressure change 3) closes before passing live steam
47
What restrictions are there in connections to a boiler vessel?
Welded connections not larger than 2” NPS Threaded, studded or expanded connections hole not larger than 2” NPS
48
List 4 locations a steam trap would be installed in a line.
- drip line - discharge piping - exhaust pump suction piping - pump discharge piping
49
When blowdown piping is below 100 psi what is it made of?
Bronze, ductile, cast iron, steel or malleable iron
50
When blowdown piping is above 100 psi what is it made of?
Sch 80
51
What is the symbol for a boiler?
S
52
What is the max dice of a threaded pipe on the power s of a boiler
2.5” NPS

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