Year Two - Plumber/Gasfitter Apprenticeship Level 2
Plumbing Systems Theory
1.What are the two types of floor mounted water closet bowls?:
1. Gravity fed.
2.Siphon jet.
2.What must the surface of a water closet bowl be?: Smooth, hard, corrosion resistant.
3.What is the minimum depth of a water closet trap seal?: 38mm.
4.What is size of a water closet trap according to NPC?: 1 3/4-2"
5.What are the two most common materials water closet bowls are made of?: Viterous
china, stainless steel.
6.A wall mounted water closet bowl has a p-trap. How is the siphon achieved?-
: Blow out jet.
7.Where are blow out water closet bowls typically used?: Large volumes of water is
generate ie healthcare.
8.Which of the following water closet bowls have the quickest flush?
A. Gravity fed.
B. Siphon jet
C. Blowout.: A. Gravity fed.
9. True or False: A wall hung water closet bowl must be a siphon jet or a blowout.: True.
10. What purpose does the water from the flushing rim orifices serve?: To create a
circular flow. Clean the bowl.
11. What tank component must be operated by the user to start the flushing cycle?:
Trip lever.
12. List the valves inside a flush tank.: Fill valve, flush valve.
13. What is used to attach the tank to the bowl?: Tank to bowl bolts.
14. What must every water closet fill valve be equipped with?: Float.
Atmospheric vacuum breaker.
15. On a fluid master fill valve what are the components used to adjust tank water
level?: Adjustment screw.
Slip collar.
, 16. What is the purpose of the refill tube?: To direct water to the overflow to maintain
trap seal.
17. True or False: The atmospheric vent must be submerged in water to function
properly.: False.
18 How would a plumber know where to set the tank water level?: Critical level mark.
19. True or False: All water closet parts are universal.: False.
20. What is the purpose(s) of the overflow tube?: If the water level gets too high it
drains. 21. What is the minimum horizontal distance from the centre line of a water
closet to another fixture?: 15"
22. Water closet flanges are typically ___" from the finished wall, but there are bowls
that will accommodate a ____" and a ____" rough-in.: 12".
10".
14".
23. If a building has DWV piping, what type of material must the flange be made from?:
Brass.
24. What must all screws used to fasten a water closet flange be?: Corrosion resistant.
25. True or False: When tightening a toilet tank to the bowl, each side must be tightened
evenly.: True.
26. Why would a plumber wait until after the water closet has been tested before
cutting bowl bolts?: In case there's a leak. You don't have to struggle with the threads.
27. True or False: When cutting bowl bolts, it is optimal to cut through only halfway
then snap off the rest.: False.
28. What are three materials used for water closet supplies?: 1. Flex/braided.
2.
Copper/chrom
e 3. PVC.
29. What could happen if the bowl seal is too high when tightening bowl to flange?: It
could leak out the bottom of the bowl. Crack the bowl.
30. What type of water closet seat must be installed in a public washroom?: Open front.
31. This is a file used for during a new water closet instillation?: To remove any burs
caused from removing test seal.
Plumbing Systems Theory
1.What are the two types of floor mounted water closet bowls?:
1. Gravity fed.
2.Siphon jet.
2.What must the surface of a water closet bowl be?: Smooth, hard, corrosion resistant.
3.What is the minimum depth of a water closet trap seal?: 38mm.
4.What is size of a water closet trap according to NPC?: 1 3/4-2"
5.What are the two most common materials water closet bowls are made of?: Viterous
china, stainless steel.
6.A wall mounted water closet bowl has a p-trap. How is the siphon achieved?-
: Blow out jet.
7.Where are blow out water closet bowls typically used?: Large volumes of water is
generate ie healthcare.
8.Which of the following water closet bowls have the quickest flush?
A. Gravity fed.
B. Siphon jet
C. Blowout.: A. Gravity fed.
9. True or False: A wall hung water closet bowl must be a siphon jet or a blowout.: True.
10. What purpose does the water from the flushing rim orifices serve?: To create a
circular flow. Clean the bowl.
11. What tank component must be operated by the user to start the flushing cycle?:
Trip lever.
12. List the valves inside a flush tank.: Fill valve, flush valve.
13. What is used to attach the tank to the bowl?: Tank to bowl bolts.
14. What must every water closet fill valve be equipped with?: Float.
Atmospheric vacuum breaker.
15. On a fluid master fill valve what are the components used to adjust tank water
level?: Adjustment screw.
Slip collar.
, 16. What is the purpose of the refill tube?: To direct water to the overflow to maintain
trap seal.
17. True or False: The atmospheric vent must be submerged in water to function
properly.: False.
18 How would a plumber know where to set the tank water level?: Critical level mark.
19. True or False: All water closet parts are universal.: False.
20. What is the purpose(s) of the overflow tube?: If the water level gets too high it
drains. 21. What is the minimum horizontal distance from the centre line of a water
closet to another fixture?: 15"
22. Water closet flanges are typically ___" from the finished wall, but there are bowls
that will accommodate a ____" and a ____" rough-in.: 12".
10".
14".
23. If a building has DWV piping, what type of material must the flange be made from?:
Brass.
24. What must all screws used to fasten a water closet flange be?: Corrosion resistant.
25. True or False: When tightening a toilet tank to the bowl, each side must be tightened
evenly.: True.
26. Why would a plumber wait until after the water closet has been tested before
cutting bowl bolts?: In case there's a leak. You don't have to struggle with the threads.
27. True or False: When cutting bowl bolts, it is optimal to cut through only halfway
then snap off the rest.: False.
28. What are three materials used for water closet supplies?: 1. Flex/braided.
2.
Copper/chrom
e 3. PVC.
29. What could happen if the bowl seal is too high when tightening bowl to flange?: It
could leak out the bottom of the bowl. Crack the bowl.
30. What type of water closet seat must be installed in a public washroom?: Open front.
31. This is a file used for during a new water closet instillation?: To remove any burs
caused from removing test seal.
