What is the primary purpose of central heating in dwellings?

To create a thermally comfortable environment

What happens if the humidity level is below 40%?

The atmosphere becomes damp and clammy

What is the average temperature difference between men and women for comfort?

Women prefer temperatures 2°C higher than men

Women prefer temperatures 1°C higher than men

Women prefer temperatures 3°C higher than men

Women prefer temperatures 4°C higher than men

What is the definition of full central heating?

The simultaneous heating of all spaces in a dwelling so as to maintain specified temperatures based upon calculated heat losses.

The simultaneous heating of some of the spaces in a dwelling so as to maintain specified temperatures based upon calculated heat losses.

The simultaneous heating of all or some of the spaces in a dwelling to temperatures below those specified based upon calculated heat losses.

The use of a single circuit of pipework that runs from the boiler and back to the boiler, connecting each radiator in turn.

Why is background heating no longer acceptable under Building Regulations Document L1a?

Because of efficiency and environmental issues

Because it heats all spaces in a dwelling

Because it uses a single circuit of pipework

What is a characteristic of one pipe systems?

They use a single circuit of pipework that runs from the boiler and back to the boiler, connecting each radiator in turn.

They are extremely rare for domestic properties.

They are designed to best practice conditions as recommended in the Domestic Heating Compliance Guide.

They are used to reduce the risk of condensation in certain rooms.

What are the two circuits used in two pipe systems?

Flow circuit and return circuit

Supply circuit and exhaust circuit

Heating circuit and cooling circuit

Main circuit and secondary circuit

What is one advantage of two pipe systems over one pipe circuits?

They reduce the heating time of the building

What is the primary function of the boiler management control in a central heating system?

To manage the operation of the boilers

To regulate the temperature of the hot water cylinder

What is the role of the expansion vessel in a central heating system?

To accommodate the expansion of water as it heats up

To manage the operation of the boilers

To regulate the temperature of the hot water cylinder

What is the function of the zone valves in a central heating system?

To control the flow of water to different zones

To manage the operation of the boilers

To regulate the temperature of the hot water cylinder

To accommodate the expansion of water as it heats up

What is the function of an open vent in a heating system?

To prevent heating systems from exceeding 100°C and assist with accommodating the expansion of water due to the water being heated.

To create an airgap between the heating system and the water main.

To use very small pipework to the radiators.

To allow multiple pipe connections in one.

What is the purpose of a manifold in a heating system?

To allow multiple pipe connections in one.

To prevent heating systems from exceeding 100°C.

To create an airgap between the heating system and the water main.

To use conduction for heating water.

What is the purpose of a feed and expansion cistern in a low-pressure heating system?

To allow water to expand when heated and to fill the system with water

To store hot water for immediate use

To provide a backup water supply in case of a system failure

To filter impurities from the water before it enters the system

What should be done with the filling loop after the filling, venting, and pressurization tasks are completed?

It should be left in place for future use

It should be cleaned and stored

It should be connected to the hot water supply

Which of the following is a characteristic of a one pipe low pressure system?

Pumped heating with gravity hot water (semi-gravity)

Fully pumped, 3 port valve (mid position/diverting) (Y/W plans)

Fully pumped, 2 x two port valves (S plan)

Which type of heating system uses modern installation techniques, materials, and controls to make better use of the energy they generate?

Fully pumped low pressure systems

What was a significant development in the late 1950s that improved the heat-up time of gravity systems?

Development of the central heating circulating pump

Introduction of underfloor heating

Installation of combination boilers

In domestic dwellings, what was the main system used for heating?

Pumped heating with gravity hot water (semi-gravity) system

In a pumped heating with gravity hot water (semi-gravity) system, where is the circulating pump installed?

On the return part of the pipework loop

On the supply part of the pipework loop

At the hot water storage cylinder

What is the main reason for connecting the flow pipe to the top connection on the radiator in a gravity circulation system?

To reduce the resistance to flow

To improve the aesthetic appearance

To decrease the water temperature

What is a detrimental feature of the gravity circulation system mentioned in the text?

Each successive radiator is fed with cooler water

The water in the system heats up too quickly

The system requires a lot of maintenance

What is the net effect of the cooler water mixing with the pipework loop in a gravity circulation system?

The radiators become larger in proportion to the heat output

The radiators heat up more quickly

The water temperature remains constant

The system becomes more energy efficient

What is the main benefit of the two pipe low pressure (semi gravity) system?

It ensures that each radiator has its own circuit to and from the boiler

It reduces the overall cost of the system

It increases the water pressure in the system

It makes the system easier to install

What is the main disadvantage of the two pipe system mentioned in the text?

It lacks secondary hot water circulation

It is more expensive to install

Central Heating Systems Quiz

Authored by Huw Evans

Professional Development

11th Grade

Used 10+ times

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Central Heating Systems Quiz

What is the maximum heat output covered by the unit for central heating systems?

The correct choice is 40kW, which is the maximum heat output covered by the unit for central heating systems.

What is the diameter of the pipework covered by the unit for central heating systems?

The correct diameter of the pipework covered by the unit for central heating systems is up to 32mm.

What do modern central heating systems use to provide the best possible heating?

Modern central heating systems use energy-saving appliances and boilers to provide the best possible heating, ensuring efficiency and cost-effectiveness.

What percentage of heat from a radiator is convected heat?

80% of the heat from a radiator is convected heat, making it the correct choice.

At what temperature does the radiator operate in the diagram?

The radiator operates at 70°C as indicated in the diagram.

What happens to the hot air in a radiator heating system?

In a radiator heating system, hot air rises due to convection, creating a cycle of warm air circulating and heating the room.

What is the temperature of the cooler air as it descends in the diagram?

The temperature of the cooler air as it descends in the diagram is 21°C, which is the correct answer choice provided.

What is the primary purpose of central heating in dwellings?

The primary purpose of central heating in dwellings is to create a thermally comfortable environment.

What is the ideal humidity range for humans to feel comfortable?

The ideal humidity range for humans to feel comfortable is 40-60%, as it helps prevent dry skin, respiratory issues, and static electricity buildup.

What happens if the humidity level is below 40%?

The eyes and throat become dry

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