CENWAT Central Heating System Design

Question 1

What is the primary purpose of a central heating system in a UK domestic property?

Accepted Answer

To distribute heat from a single source throughout the building

Answer

To provide localised heating in individual rooms only

Answer

To solely heat domestic hot water

Answer

To ventilate the property

Question 2

Which pipework layout uses a single pipe that connects all radiators in sequence?

Accepted Answer

One-pipe system

Answer

Two-pipe system

Answer

Microbore system

Answer

UFH manifold system

Question 3

In a sealed central heating system, what component absorbs expansion of water when heated?

Accepted Answer

Expansion vessel

Answer

Feed and expansion cistern

Answer

Pressure relief valve

Answer

Air separator

Question 4

What is the recommended system design working pressure for most sealed domestic central heating systems?

Accepted Answer

1–1.5 bar when cold

Answer

3–4 bar when cold

Answer

0.1–0.3 bar when cold

Answer

5–6 bar when cold

Question 5

Which document provides the primary design guidance for central heating installations in the UK?

Accepted Answer

BS EN 12828

Answer

Part L of Building Regulations

Answer

Gas Safety (Installation and Use) Regulations 1998

Answer

CIBSE Guide B

Question 6

What term describes the difference in temperature between flow and return pipes in a central heating system?

Accepted Answer

Delta T (ΔT)

Answer

System pressure differential

Answer

Hydraulic head

Answer

Mean water temperature