Unit 317 Session 4b Underfloor heating underpinning knowledge

​Underfloor heating

​Open the document by clicking on the the link below and an answer the questions that follow:

Underfloor chapter.pdf

Multiple Choice

Which of the following is a benefit of underfloor heating systems?

• High temperature operation

• Visible heat sources

• Eliminates cold spots

• Requires radiators

Multiple Choice

What is the typical temperature range for underfloor heating in screeded floors?

• 30–35°C

• 40–45°C

• 50–55°C

• 60–65°C

Multiple Choice

What is the main method of heat emission in underfloor heating systems?

• Convection only

• Radiation only

• Conduction and radiation

• Convection and conduction

Multiple Choice

What is the recommended maximum TOG rating for floor coverings used with underfloor heating?

• 1.0

• 1.5

• 2.0

• 2.5

Multiple Choice

Which of the following is NOT a common fuel type used in underfloor heating systems?

• Gas

• Oil

• Coal

• Biomass

Multiple Choice

What is the purpose of using a thermostatic blending valve in an underfloor heating system?

• To increase the water pressure

• To blend the flow water with return water

• To reduce the noise of the system

• To filter impurities from the water

Multiple Choice

Why is zoning with 2-port motorised zone valves beneficial in heating systems?

• It reduces the cost of installation

• It allows for independent time control of heat emitters

• It increases the water temperature

• It simplifies the plumbing layout

Multiple Choice

What is one advantage of underfloor heating systems?

• They are very noisy compared to other systems.

• They have a higher possibility of leaks.

• They allow better positioning of furniture and interior design.

• They require radiators to drain and remove.

Multiple Choice

Which of the following is a disadvantage of underfloor heating systems?

• They are environmentally friendly.

• They have a lower possibility of leaks.

• They can be expensive to install.

• They provide better heat distribution.

Multiple Choice

How is each underfloor heating circuit controlled?

• By a central thermostat for the entire system.

• By a room thermostat that activates a motorised head.

• By manual adjustment of the pipes.

• By a single thermostat for all rooms.

Multiple Choice

What is the primary function of a manifold in an underfloor heating system?

• To increase the temperature of the water

• To distribute heat energy evenly

• To cool down the water

• To add pressure to the system

Multiple Choice

What component is used to mix the flow and return water to the required temperature in underfloor heating circuits?

• Circulating pump

• Isolation valve

• Thermostatic mixing valve

• Pressure gauge

Multiple Choice

Where is the circulating pump located in an underfloor heating system?

• Between the heat source and the manifold

• Between the thermostatic mixing valve and the flow manifold

• At the end of the heating circuit

• Next to the pressure gauge

Multiple Choice

What is the main purpose of the series pattern in underfloor heating systems?

• To ensure an even temperature across the floor

• To create a decorative pattern

• To reduce installation costs

• To increase water flow speed

Multiple Choice

Which pattern is also known as the bifilar pattern?

• The snail pattern

• The series pattern

• The zigzag pattern

• The spiral pattern

Multiple Choice

What is a key consideration when positioning components in underfloor central heating systems?

• Ensuring the efficiency of the system

• Reducing the number of components

• Increasing the size of the components

• Decreasing the water temperature

Multiple Choice

Why is the positioning of the manifold important in underfloor heating systems?

• To balance the length of each circuit

• To increase the water temperature

• To reduce the number of circuits

• To enhance the aesthetic appeal

Multiple Choice

What is a potential problem that may occur where the manifold is located in a plumbing system?

• Increased water pressure

• Potential 'hot spot' due to pipework congestion

• Reduced water flow

• Pipe corrosion

Multiple Choice

What should be considered when setting out the pattern for pipework arrangements?

• The color of the pipes

• The orientation and shape of the room

• The type of water used

• The height of the ceiling

Multiple Choice

What is the recommended design flow temperature for underfloor heating on a solid floor?

• 30°C

• 40°C

• 50°C

• 60°C

Multiple Choice

What is the maximum circuit length for a 15 mm pipe in underfloor heating?

• 80 m

• 90 m

• 100 m

• 110 m

Multiple Choice

What is the maximum heat output for a suspended timber floor system?

• 50 W/m²

• 70 W/m²

• 90 W/m²

• 100 W/m²

Multiple Choice

What is the recommended design flow temperature for a suspended timber floor system?

• 50°C

• 55°C

• 60°C

• 65°C

Multiple Choice

What is the maximum circuit length for a suspended timber floor system using a 15 mm pipe?

• 60 m

• 70 m

• 80 m

• 90 m

Multiple Choice

How much coverage per circuit is provided using a double spreader plate at 225 mm centres?

• 15 m²

• 17 m²

• 19 m²

• 21 m²

Multiple Choice

Diagram of solid floor underfloor heating installation showing components like tiled floor covering, edge insulation, and underfloor heating pipes.

• Wooden floor covering

• Carpet insulation

• Radiator heating system

• Tiled floor covering

Multiple Choice

What is the purpose of double heat spreader plates in underfloor heating installations?

• To provide structural support

• To distribute heat evenly

• To insulate the floor

• To reduce noise

Multiple Choice

In a suspended floor underfloor heating installation, what is placed directly above the underfloor heating pipes?

• Finished floor surface

• Floating floor panels

• Tongued and grooved floor boards

• Wall

Multiple Choice

What component is used in both suspended and floating floor underfloor heating installations to cover the heating pipes?

• Timber joists

• Insulation

• Double heat spreader plates

• Wall

Multiple Choice

What is the recommended design flow temperature for a floating floor heating system?

• 50°C

• 60°C

• 70°C

• 80°C

Multiple Choice

What is the maximum heat output for a floating floor heating system?

• 50 W/m²

• 60 W/m²

• 70 W/m²

• 80 W/m²

Multiple Choice

What is the maximum circuit length for a 15 mm pipe in a floating floor heating system?

• 60 m

• 70 m

• 80 m

• 90 m

Multiple Choice

What should be done before commissioning an underfloor heating system?

• Install the floor panels

• Flush the heating circuits with water

• Connect the hydraulic test pump

• Set the correct temperature at the manifold