Page 559 - The City and Guilds Textbook: Plumbing Book 1 for the Level 3 Apprenticeship (9189), Level 2 Technical Certificate (8202) and Level 2 Diploma (6035)

Chapter 8 Rainwater systems

Test your knowledge

1 What are the most important factors to be considered when sizing and
selecting a guttering system?
a Drainage connection, rainfall direction, durability
b Rainfall intensity, roof area, gutter fall
c Material type, height, drainage system type
d Environmental factors, weight, labour availability
2 On completion of the installation of a rainwater gutter system, how would
you check that the system does not leak?
a Return on a day when it is raining to visually check
b Carry out a visual inspection

c Discharge water on the roof with a hosepipe
d Use a manometer and weir cup
3 What type of gutter profile is shown in the image on the left?
a Half round
b Deep flow
c Ogee
d Square
4 Which is the most suitable gradient of fall for a standard gutter
installation?
a 2 mm/m b 8 mm/m
c 10 mm/m d 60 mm/m
5 A south-facing gutter 20 m long is subjected to a 30°C temperature
rise. What is the expansion of the gutter when the coefficient of linear
expansion of the gutter is 0.06 mm/m/°C?
a 12 mm b 18 mm
c 36 mm d 42 mm
6 Which part of the Building Regulations specifically covers rainwater
systems?
a Document G
b Document H
c Document J
d Document P
7 What is the recommended clipping distance for PVCu gutters to fascia
boards?
a 650 mm
b 750 mm
c 800 mm
d 1000 mm

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