Page 442 - 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 What is the minimum recommended distribution temperature of hot
water supplied by a storage cylinder?
a 48°C
b 55°C
c 60°C
d 65°C
2 Which Building Regulation relates to the hot water delivery systems in
dwellings?
a Part F
b Part G

c Part P
d Part L
3 Which one of the following is classed as a localised hot water system?
a Under-sink single point heater
b Thermal store
c Combination boiler
d Open vented
4 Within an open vented hot water system, which of the following are the
correct connection methods for the open vent pipe off the draw-off pipe?
a Open vent a minimum of 15 mm diameter connected within 450 mm
of the draw-off connection from the cylinder
b Open vent a minimum of 15 mm diameter connected within at least
450 mm of the draw-off point from the cylinder
c Open vent a minimum of 22 mm diameter connected within 450 mm
of the draw-off connection from the cylinder
d Open vent a minimum of 22 mm diameter connected within at least
450 mm of the draw-off point from the cylinder

5 The safety devices within an unvented hot water cylinder are designed to
prevent the water from exceeding which of the following temperatures?
a 60°C
b 65°C

c 95°C
d 100°C
6 Where should a secondary return be connected within a hot water storage
cylinder?
a A quarter of the way down
b Halfway down
c Two-thirds of the way from the bottom
d A quarter of the way up

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