Page 632 - The City and Guilds Textbook: Plumbing Book 1 for the Level 3 Apprenticeship (9189), Level 2 Technical Certificate (8202) and Level 2 Diploma (6035)

The City & Guilds Textbook: Plumbing Book 1

Test your knowledge

1 Which building regulation must sanitation systems comply with?
a Part G
b Part H

c Part F
d Part L
2 What is the correct pressure for the soundness testing of above-ground
drainage systems?

a 21 mm
b 28 mm
c 32 mm
d 38 mm
3 What is the minimum trap seal depth for a bath?
a 25 mm
b 50 mm
c 75 mm
d 100 mm
4 What is the maximum length of waste pipe from a bath when connecting
to a primary vented stack?
a 1.7 m
b 3 m
c 5 m

d 6 m
5 When a stack is installed within 3 m of an openable window, what
minimum distance above that window should it terminate?

a 300 mm
b 500 mm
c 900 mm
d 1000 mm
6 What type of trap is shown in the image on the left?
a Bath trap
b In-line trap
c Waterless trap
d Washing machine trap

7 What problem can be caused by the use of short-radius bends at the
bottom of discharge stacks?
a Compression

b Evaporation
c Excessive velocity
d Induced siphonage

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