Cold Water Systems Quiz L3P2U5,2.4:6

What type of valves do gravity fed showers use to blend cold water and hot water?

• Bath/shower mixing taps

• Thermostatic mixing valves

• Both A and B

• Manual-type mixing valves

What is the main difference between manual-type mixing valves (non-thermostatic) and thermostatic mixing valves?

• Thermostatic valves require stable hot water supply temperature

• Manual valves adjust water temperature for flow and temperature fluctuations

• Thermostatic valves rely on equal pressure and flowrate of hot and cold supplies

• Manual valves maintain showering temperature despite flowrate fluctuations

What are the two types of thermostatic mixing valves?

• Wax Capsule and Bi-metallic coil

• Manual-type and Thermostatic

• Gravity fed and Bath/shower mixing

• Single impeller and Twin impeller

What type of backflow prevention device is built in to a bath/shower mixer tap?

• Hose retaining ring

• EC/ED backflow prevention device

• EA/EB Back flow prevention devices

• HC Diverter

Where is a single impeller shower pump fitted?

• Before the shower valve

• After the shower valve

• At the shower head

• At the cold water mains supply

What should be fitted to electric showers to prevent back flow?

• EC/ED backflow prevention device

• Hose retaining ring

• EA/EB Back flow prevention devices

• HC Diverter

What is the power source for instantaneous electric showers?

• Electricity

• Cold water supply

• Hot water supply

• Gravity

What is the purpose of an EC/ED backflow prevention device in an electric shower?

• To maintain showering temperature

• To boost the mixed water from the valve to the shower head

• To prevent back-siphonage

• To control the flow of hot water

What is the temperature range for a showering temperature in a thermostatic mixing valve?

• 0oC to 100oC

• 38oC to 42oC

• 55oC to 100oC

• 15oC to 55oC

What is the purpose of a twin impeller shower pump?

• To boost the mixed water from the valve to the shower head

• To maintain showering temperature

• To boost the individual low pressure hot and cold supplies to the shower mixing valve

• To prevent back-siphonage