A S S I G N M E N T
7
Textbook Assignment:
“Mechanical Systems and Plan.” Pages 8-1 through 8-24.
“Electrical
Systems and Plan.”
Pages 9-1 through 9-19.
“Construction Drawings.”
Pages 10-1 through 10-33.
7-1.
7-2.
7-3.
7-4.
7-5.
The system of pipes, fixtures, and
appurtenances used inside a
building for supplying water and
removing wastes is known by what
general term?
1.
Mechanical systems
2.
Plumbing
3.
Water distribution
4.
Piping
When working with mechanical plans,
you must become familiar with which
of the following codes?
1.
National Plumbing Code and
National Electrical Code®
2.
National Plumbing Code and
local NAVFAC codes
3.
Local codes and National
Plumbing Code
4.
Local codes and ANSI codes
Copper is widely used for tubing in
piping systems for which of the
following reasons?
1.
It is less costly than other
types of pipe
2.
It is available in two wall
thicknesses and is faster to
install
3.
It does not rust and is
resistant to scale particles in
the pipe
4.
Fittings are screwed to the
pipe which allows for faster
completion of the piping system
Which of the following types of
copper tubing is frequently used as
replacement piping because of its
flexibility?
1.
Type K
2.
Type L, hard tempered
3.
Type M
4.
Type L, soft tempered
Which of the following advantages
does plastic pipe have over metal?
1.
Flexibility
2.
High resistance to rupture and
total resistance to rust
3.
It can be installed either
above or below ground
4.
All of the above
7-6.
What type of polyvinyl chloride
pipe can be used in both cold-water
and hot-water systems?
1.
PVC
2.
APVC
3.
CPVC
4.
PVC-C
7-7.
Galvanized steel pipe sizes are
based on what nominal size?
1.
Inside diameter
2.
Outside diameter
3.
Wall thickness
4.
Inside radius
7-8.
What type of fitting
for joining straight
should be used
runs of
dissimilar metal pipe that require
easy disconnection?
1.
Union
2.
Coupling
3.
Dielectric union
4.
Dielectric coupling
7-9.
For what type of pipes should
(a) solvent welded and (b) sweated
joints be used?
1.
(a) Galvanized (b) plastic
2.
(a) Plastic
(b) copper
3.
(a) Plastic
(b) galvanized
4.
(a) Copper
(b) plastic
IN ANSWERING QUESTIONS 7-10 THROUGH 7-13,
SELECT THE TYPE OF VALVE FROM THE
FOLLOWING LIST THAT BEST MATCHES THE
DESCRIPTION GIVEN IN THE QUESTION.
7-10.
This valve has a wedge-shaped,
movable plug that fits tightly
against the seat when closed.
1. A
2. B
3. C
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