問題一覧
1
It is one of man's essential needs
Water
2
Water is a mixture of
Hydrogen, Oxygen
3
It is ___ times heavier than air but is ___ times lighter in its gaseous state
830, 133
4
Where can we get water?
Rainwater, Natural surface water, Underground water
5
Water is conveyed from the source to household through a ______________
System of pipes
6
Water distribution for commercial buildings are conveyed through _____
Pipes
7
2 types of pipes
PVC, Cast iron or G.I. pipes
8
PVC
Polyvinyl Chloride
9
It became as common replacement for metal piping
PVC
10
PVCs _____, _______, _______, and ______ have made it one of the most widely used plastics in the world
Strength, Durability, Easy installation, Low cost
11
One of the most widely used plastics in the world
PVCs
12
Pipes used for water line distribution systems may be classified as:
Steel and wrought iron pipe, Cast iron pipe, Seamless brass and copper pipe, Special pipes such as PVC, Aluminum, Stainless steel pipes, CPV'C
13
Common issues with cast iron
Corrosion, Very heavy, Clogged and slow drains, Sewer backup into homes, Expensive and messy repairs
14
This is almost always the first issue that will take place, often from the pipe's interior that you can't see
Corrosion
15
This can lead to sinking in ground and can cause cracking
Very heavy
16
Sewer backup into homes. This can lead to:
Water damage, Unsanitary conditions, Pest manifestations, Can allow mold to grow
17
You may even have to remove the slab in places to replace it
Expensive and messy repairs
18
CPV'C
Chlorinated Polyvinyl Chloride
19
It is a sturdy, stiff vinyl thermoplastic, featuring excellent corrosion resistance even at high temperatures
CPV'C
20
With its ability to be machined, manufactured and welded, along with its chemical resistance, flame resistance, and exceptional tensile strength
CPV'C
21
Offers rust resistance and weight savings at the cost of strength and general corrosion resistance
Aluminum
22
Offers superior corrosion resistance and tensile strength at the cost of added weight
Stainless steel
23
Refers to a type of pipe made from wrought iron, which is a specific form of iron with a low carbon content
Steel and wrought iron pipe
24
It is known for its exceptional strength, durability and corrosion resistance
Steel and wrought iron pipe
25
Rusting is exposed to
Air, Moisture
26
Corrosion is exposed to
Air, Chemicals