Unit 306

Question 1

What is the minimum recommended distribution temperature of hot water supplied by a storage cylinder?

Answer 1

60°C

Question 2

Which Building Regulation relates to the hot water delivery systems in dwellings?

Answer 2

Part G

Question 3

What can be classed as a localised hot water system?

Answer 3

Under-sink single point heater

Question 4

The safety devices within an unvented hot water cylinder are designed to prevent the water from exceeding which temperature?

Answer 4

95°C

Question 5

Where should a secondary return be connected within a hot water storage cylinder?

Answer 5

Halfway down

Question 6

What temperature should the temperature relief valve fitted to an unvented hot water storage vessel be set to discharge at?

Answer 6

90°C

Question 7

Which type of thermostatic mixing valve (TMV) should be installed within NHS and healthcare properties?

Answer 7

TMV3

Question 8

What is the expected temperature difference between the flow and return in a modern sealed CH system incorporating a condensing type boiler, if designed correctly?

Answer 8

20°C.

Question 9

Which pipe within an open vented central heating system allows the system to remain at atmospheric pressure?

Answer 9

Open vent pipe.

Question 10

Which heating system incorporates 2 x two-port valves?

Answer 10

S plan

Question 11

Which type of boiler utilises increased efficiency by recovering latent heat from the flue gases?

Answer 11

c Condensing boiler

Question 12

What is the recommended installation height from the floor for a radiator?

Answer 12

b 150 mm

Question 13

Within a sealed heating system, which component accommodates the expansion of water during heating?

Answer 13

d Expansion vessel

Question 14

Which part of the Building Regulations specifically covers rainwater systems?

Answer 14

Document H

Question 15

What is the recommended clipping distance for PVCu gutters to fascia boards?

Answer 15

750 mm

Question 16

Which of the following British Standards gives specific information on the intensity of rainfall in the UK?

Answer 16

BS EN 12056-3:2000

Question 17

Which building regulation must sanitation systems comply with?

Answer 17

a Part G

Question 18

What is the minimum trap seal depth for a bath?

Answer 18

b 50 mm

Question 19

What is the maximum length of waste pipe from a bath when connecting to a primary vented stack?

Answer 19

b 3 m

Question 20

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

Answer 20

c 900 mm

Question 21

What is the maximum vertical distance below a branch connection into a stack (82 mm to 160 mm in diameter) where no other connection is allowed?

Answer 21

200 mm

Question 22

Which British Standard offers specific guidance on the space requirements for sanitary appliances?

Answer 22

BS 6465-2