Test Your Knowledge
Write your answers on a separate sheet of paper.
Do not write in this book.
1. Installation of all piping within the walls,
floors, and ceilings of a finished building is
called _____.
A. first rough
B. fixture installation
C. rough-in
D. second rough
2. When measuring to determine the length of
pipe required to connect two fittings, the
method that requires an allowance be made
for laying length is _____.
A. center-to-center
B. face-to-face
C. shoulder-to-shoulder
D. None of the above.
3. Water hammer arrestors should be installed
near the stub-out for fixtures or appliances
with _____ valves.
A. ball
B. gate
C. compression
D. quick-closing
4. If the outlet of a T/P relief valve is nomi-
nally 3⁄4″, the discharge pipe joined to it
must be _____.
A. 3⁄4″
B. 1″
C. 1⁄2″
D. 1⁄8″
5. When facing the location of a fixture, the
hot water pipe should be installed _____ the
cold water pipe.
A. to the left of
B. to the right of
C. above
D. below
6. If the face-to-face distance between a 3⁄4″
CPVC tee and a 3⁄4″ elbow is 18″, what
length of 3⁄4″ CPVC pipe is required to prop-
erly connect the two fittings?
A. 19″
B. 191⁄8″
C. 191⁄4″
D. 191⁄2″
7. The first step in the process of joining
plastic pipe is to _____ the pipe and fitting.
A. clean
B. apply solvent cement to
C. caulk
D. apply joint tape to
8. When making cemented connections in
plastic piping, what practice ensures even
distribution of the solvent cement?
A. Cleaning the inside of the fitting.
B. Twisting the fitting 1⁄4 turn as it is
installed.
C. Applying a thick coating of cement on
the inside of the joint.
D. Applying a thick coating of cement on
the end of the pipe.
9. The plumber can be assured that a
cemented plastic pipe joint is correctly
made if a(n)___ of cement forms completely
around the fitting.
10. If the face-to-face distance between a 1⁄2″
copper ell and a 1⁄2″ copper tee is 61⁄2″, the
length of the connecting copper pipe is
_____.
A. 61⁄2″
B. 7″
C. 71⁄4″
D. 71⁄2″
11. The minimum recommended bend radius
in PEX is _____ times the outside diameter
of the tube.
A. 18
B. 4
C. 10
D. 8
12. Horizontal runs of PEX should be
supported every _____ inches.
A. 16
B. 24
C. 32
D. 48
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Section 3 Plumbing System Design and Installation