# Cast Iron Fibreglass Glass Lead and Historic Piping

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 Author: iLLian ID: 288742 Filename: Cast Iron Fibreglass Glass Lead and Historic Piping Updated: 2014-11-14 00:23:36 Tags: Plumbing 1st Period Folders: Plumbing Description: Tools and Materials Show Answers:

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1. What are three methods of joining cast iron pipe are approved by the National Plumbing Code of Canada - 2005?
• caulked oakum and lead/PC4
• mechanical joint
• compression joint
2. List five purposes of the yarn or oakum in a cast iron caulked joint.
• centres the pipe in the bell hub
• seals the joint
• holds the lead
• gives the joint flexibility
• retains the lead
3. How much lead (by weight) must be packed into each of the following sizes of caulked cast iron joints?
a) 2"
b) 6"
c) 3"
d) 4"
e) 10"
f) 8"
• a) 2" x 3/4 lbs/inch = 1 1/2 lbs
• b) 6" x 3/4 lbs/inch = 4 1/2 lbs
• c) 3" x 3/4 lbs/inch = 2 1/4 lbs
• d) 4" x 3/4 lbs/inch = 3 lbs
• e) 10" x 3/4 lbs/inch = 7 1/2 lbs
• f) 8" x 3/4 lbs/inch = 6 lbs
4. When installing bell and spigot cast iron soil pipe, in which direction should teh sewage flow through the pipe?
Out of the spigot into the hub
5. The lead used for caulking cast iron joints has a melting point of __________
The lead used for caulking cast iron joints have a melting point of 327 °C (620 °F)
6. What tool is essential when pouring a horizontal caulked joint, but is not necessary when pouring a vertical joint?
a running rope
7. The weight of oakum in a caulked joint is based on what ratio to the weight of lead?
10% of lead weight
8. List the two purposes of the lead in a  caulked cast iron joint.
• makes the joint rigid
• creates a good seal
9. What depth does the National Plumbing Code specify that the lead in a caulked cast iron joint shall be?
25 mm (1") Sentence 2.3.2.1(2)
10. Before you dip a ladle into molten lead, the ladle should be _________ and __________.
Dry and Prewarmed
11. List two materials that may be used instead of lead for caulking cast iron joints.
• PC4
12. What is the relationship between  the weight of lead in a caulked joint and the diameter of the pipe?
3/4 pound of lead per inch of diameter
13. List the weight of cast iron approved for use in Alberta.
18 kn
14. In what way does Duriron differ from gray cast iron?
Silicone is added, increased corrosion resistance, more brittle and has a higher rate of expansion.
15. List two advantages of cast iron over copper tube for use in a drainage, waste of vent system.
• lower expansion rate
• greater corrosion resistance
16. List two methods of cutting cast iron
• snap cutters
• hammer and chisel
17. List two disadvantages of cast iron pipe as opposed to copper pipe
• heavier
• poor resistance to shock
18. How does C.I. pipe differ from steel pipe?
higher carbon content, greater resistance to corrosion
19. When cast iron pipe is installed in its permanent position, how can the grade of pipe be identified and how can this be ensured
The grade of pipe can be identified by the manufacturer's marking on the pipe and it is ensured by being installed so that the pipe markings are readily readable.
20. By what two other names is silicon iron known?
• Duriron
• Corrosiron
21. What color is the characteristic fracture of the following cast iron pipes?
a) gray iron
b) silicon iron
• gray iron - gray
• silicon iron - silver white
22. List four characteristic properties of cast iron.
• hard
• brittle
• good wear resistance
• good corrosion resistance
23. In addition to the characteristic properties of cast iron, what are the two properties of silicon iron?
• very brittle
• better corrosion resistance
24. The sketch below shows cast iron pipe joints in section; indicate the direction of flow of liquid through these pipes
25. Chemical Symbol for Lead_____
Specific weight for Lead _____
• Chemical Symbol for Lead__Pb___
• Specific weight for Lead __11.3___
26. Sheet lead used for flashing must weigh at least _____ pounds per ________. This is the equivalent to a thickness of ____/64".
Sheet lead used for flashing must weigh at least _5_ pounds per _square foot_. This is the equivalent to a thickness of _5_/64".
27. The minimum dimensions of flashing allowed in Alberta are _____ x _____.
The minimum dimensions of flashing allowed in Alberta are _20"_ x _20"_.
28. If ten 4 inch CJ joints are to be caulked with lead and oakum, the weight of lead would be ______ pounds and the oakum would be _______ percent of the weight of the lead.
If ten 4 inch CJ joints are to be caulked with lead and oakum, the weight of lead would be _10 x 4 x 3/4 = 30_ pounds and the oakum would be _10_ percent of the weight of the lead.
29. Where a lead closet stub is used, the length of the stub below the floor shall be at least ________________.
Where a lead closet stub is used, the length of the stub below the floor shall be at least _3" minimum (75mm)_. Sentence 2.3.3.8(6)
30. How is glass pipe joined together?
Glass pipe is joined by use of glass mechanical joint couplings
31. What is the advantage of glass pipe?

(Any of the following would be correct)
• product purity
• transparent
• high heat resistance
• low expansion rate
32. What is glass pipe primarily used for?
Glass pipe is primarily used for the handling of corrosive waste for laboratories.
33. What are two methods of joining fibreglass pipe?

(Any of the following would be correct)
• butt and strap
• bell and spigot
• flanged
• threaded and bonded
• O-ring bell and spigot
34. What is the safety concern when using lead?
35. Name four of the historical piping systems.

(Any of the following would be correct)