3e451 Volume 3 Plumbing Systems
- 1.(401) What wall thicknesses are available in copper tubing for drinking water?
- A.
A, B, C, D
- B.
N, O, P, DWV
- C.
K, L, M, DWV
- D.
Schedule 40 and 80
- 2.(401) Galvanization provides a pipe with what benefit?
- A.
Makes the pipe easier to bend
- B.
Increases pipe thickness
- C.
Increases pipe strength
- D.
Reduces corrosion
- 3.(402) What fitting joins pipes so they can be taken apart later?
- A.
Union
- B.
Nipple
- C.
Adapter
- D.
Coupling
- 4.(402) How do street elbows and standard elbows differ?
- A.
Standard elbows have male threads
- B.
Street elbows have recessed threads
- C.
Standard elbows have tapered threads
- D.
Street elbows have one female and one male end
- 5.(402) hows do copper pressure fittings differ from copper drain, waste, and vent (DWV) fittings?
- A.
DWV fittings are threaded
- B.
Pressure fittings are threaded
- C.
DWV fittings have a short radius sweep
- D.
Pressure fittings have a deeper solder pocket
- 6.(403) What is the smallest increment on most of the tape measures in our trade?
- A.
Sixty-fourth inch
- B.
Thirty-second inch
- C.
Sixteenth inch
- D.
Eighth inch
- 7.(403) What is the next largest sixteenth-inch mark after 3/4?
- A.
15/16ths
- B.
13/16ths
- C.
10/16ths
- D.
9/16ths
- 8.(404) Convert 7 feet to inches.
- A.
60 inches
- B.
72 inches
- C.
84 inches
- D.
96 inches
- 9.(405) What kind of tape measurer can you use to determine the travel when the offset angle is known to be 45 degrees?
- A.
Angle rule
- B.
Travel rule
- C.
Standard rule
- D.
Plumber's rule
- 10.(406) How do you determine the center of a fitting?
- A.
By reading the branch, then the run
- B.
By determining the angle of the branch
- C.
By dividing the length of the fitting by 2
- D.
By finding where lines drawn through the fitting intersect
- 11.(406) An end-to-center measurement is made from the?
- A.
Middle of the pipe to end of fitting
- B.
End of pipe to center of fitting
- C.
Center of pipe to end of fitting
- D.
End of face to center of back
- 12.(407) When cutting tubing with a tubing cutter, how far do you turn the handle after each revolution?
- A.
1/8 turn
- B.
1/4 turn
- C.
1/2 turn
- D.
1 full turn
- 13.(407) To remove the burr from inside a piece of pipe, operate the handle of the reamer with?
- A.
Short, even, counterclockwise strokes
- B.
Long, even, counterclockwise strokes
- C.
Long, even, clockwise strokes
- D.
Short, even, clockwise strokes
- 14.(408) What diameter steel pipe sizes are you able to thread with a nonadjustable ratchet style hand threader
- A.
1/8 - 2 inches
- B.
1/8 - 4 inches
- C.
1/2 - 2 1/2 inches
- D.
1/2 - 3 inches
- 15.(408) When threading steel pipe with a hand threader, how often do you apply oil to the pipe dies?
- A.
When the dies squeak
- B.
Before and after cutting threads
- C.
Every two or three downward stokes of the die handle
- D.
Once, at the halfway point of the threading operation
- 16.(408) What is the purpose of oiling while threading the steel pipe?
- A.
Allows the pipe dies to turn freely inside the die holder
- B.
Prevents the dies and threads from overheating and becoming damaged
- C.
The oil penetrates the pipe walls, slows down the corrosion process, and allows increased pipe life
- D.
The oil maintains a thin protective coating on the pipe and prevents flying debris from injuring the user
- 17.(409) When threading a fitting on a pipe, what happens if you overtighten a fitting?
- A.
Leaks will be stopped completely
- B.
The wrench you are using might break
- C.
Overall pipe length decreases by 1 inch
- D.
The fitting stretches and the joint leaks
- 18.(409) What size pipe wrench do you use on a 1/4 inch pipe?
- A.
4 inch
- B.
8 inch
- C.
10 inch
- D.
12 inch
- 19.(410) What preparation must you make to produce a good bond between the base metal and the solder in a copper soldered joint?
- A.
The solder must be lead free
- B.
The pipe must be reamed and cut
- C.
The solder must be 95/5 solder
- D.
The metal surfaces must be perfectly clean at the joint
- 20.(410) How much solder is needed to solder a 1/2 inch connection
- A.
1/2 inch
- B.
3/4 inch
- C.
7/8 inch
- D.
1 inch
- 21.(411) When using a lever type tubing bender, you can make angles up to how many degrees?
- A.
45 degrees
- B.
90 degrees
- C.
120 degrees
- D.
180 degrees
- 22.(411) What action creates an watertight and airtight seal on a ferruled joint?
- A.
Tighten the nut which crimps the ferrule into the tubing and against the fitting
- B.
The capillary action between the components
- C.
Squeezing the ferrule into the nut
- D.
The compression of the tapered threads
- 23.(412) What is one disadvantage of the no-hub drainage system?
- A.
No-hubs have a tendency to leak
- B.
More tools are required to make this type of joint
- C.
Support around the pipe may be required
- D.
The pipe ends must be reinforced to ensure they do not crush under pressure
- 24.(412) When solvent welding plastic pipe, how do you insert the pipe into the fitting?
- A.
Put the pipe halfway into the fitting to allow for expansion and contraction
- B.
Quickly insert the pipe into the fitting with a one-quarter turning motion
- C.
Insert the pipe into the fitting and give the pipe a full turn
- D.
Thread the pipe into the fitting until no threads show
- 25.(412) How is large underground plastic pipe joined?
- A.
Solvent welding
- B.
O-ring joints
- C.
Tig welding
- D.
Threading
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