Why do industrial/commercial heating systems require greater capacity compared to domestic heating systems?

• They are cheaper to install.

• They need to cope with larger spaces and multiple floors.

• They are easier to maintain.

• They use less energy.

What is one of the benefits of heating a building in addition to providing thermal comfort?

• It increases the building's value.

• It prevents surface condensation and mould growth.

• It reduces the need for insulation.

• It makes the building look more modern.

Which of the following is NOT a type of heating system used in commercial and industrial buildings?

• Two-pipe parallel return

• Two-pipe reverse return

• Pumped primary and secondary

• Single-pipe direct return

Why might some industries require their products to be maintained at a certain temperature?

• To reduce energy costs.

• To ensure product quality and safety.

• To comply with building codes.

• To improve employee comfort.

What are the two pipework networks in a two-pipe parallel return system?

• Flow and return

• Supply and demand

• Inlet and outlet

• Hot and cold

What determines the size of the pipes in a two-pipe parallel return system?

• The temperature of the water

• The mass flow rate of the emitters

• The length of the pipes

• The type of material used

How do the flow pipes change as they progress through the system?

• They get larger

• They stay the same size

• They get smaller

• They change shape

What determines the frictional resistance of each section of pipe?

• The temperature of the water

• The length and diameter of the pipe

• The type of material used

• The pressure of the water

What determines the duty of the pumps in a two-pipe parallel return system?

• The total resistance of the system

• The temperature of the water

• The size of the emitters

• The length of the pipes

What valves are used to facilitate system balancing in a two-pipe parallel return system?

• Check valve and gate valve

• Control valve and lockshield valve

• Ball valve and butterfly valve

• Pressure valve and relief valve