Hot Water Power point 4

What does a standard, gravity-fed hot water system require for optimal performance?

• High head height between the cold water storage cistern and the hot water cylinder

• Low head height between the cold water storage cistern and the hot water cylinder

• High temperature difference between the cold and hot water

• Low temperature difference between the cold and hot water

What is the total measurement from the bottom of the CWSC to the cold feed position?

• 50mm

• 25mm

• 75mm

• 100mm

What is the purpose of having the hot water stop first?

• To avoid scalding people

• To save energy

• To reduce water usage

• To increase water temperature

Which pipe is an exception to the slight fall rule?

• Hot water draw off

• Cold water feed

• Main supply pipe

• Overflow pipe

Why is it important to stop the flow of water to the hot water system?

• To increase water temperature

• To allow maintenance

• To reduce energy consumption

• To prevent overflow

In what location is a service valve typically installed?

• Near the water heater

• Just prior to the float operated valve

• At the end of the pipe

• Near the main water source

Which valve in the diagram is used to control the cold water supply?

• Service valve

• Fullway gate valve

• Pressure relief valve

• Ball valve

What is the function of the service valve in the plumbing system?

• To shut off water supply

• To heat the water

• To mix hot and cold water

• To increase water pressure

Which component ensures the water level is maintained in the tanks shown in the diagram?

• Fullway gate valve

• Float operated valve

• Service valve

• Pressure relief valve

What is the minimum length required for the initial part of the hot distribution pipe?

• 300mm

• 450mm

• 600mm

• 750mm