AC 2.46 Mixing Valves in Gravity Showers Quiz

Why does brass expand more quickly than invar steel in a bi-metallic coil?

• Brass is a better conductor of electricity

• Brass has a higher thermal expansion rate

• Brass is lighter than invar steel

• Brass is more flexible than invar steel

What do bath/shower mixing valves rely on to work effectively?

• Equal pressures of both hot and cold supplies

• Different pressures of hot and cold supplies

• Only hot water supply

• Only cold water supply

What feature do bath/shower mixers have to prevent back-siphonage?

• Inbuilt air gap

• Pressure regulator

• Temperature sensor

• Flow restrictor

What is the inbuilt air gap in bath/shower mixers known as?

• HC Diverter

• Pressure Valve

• Flow Controller

• Temperature Gauge

Which of the following is a type of shower pump?

• Double impeller outlet type

• Single impeller outlet type

• Triple impeller inlet type

• Quad impeller outlet type

Which type of shower pump has twin impellers?

• Single impeller outlet type

• Twin impeller inlet type

• Triple impeller outlet type

• Quad impeller inlet type

What is the main benefit of using a shower pump?

• Increased water temperature

• Increased water pressure

• Decreased water usage

• Decreased water pressure

How many impellers do twin impeller shower pumps have?

• One

• Two

• Three

• Four

What is the purpose of having the cold feed connection to the cylinder higher than the cold for the shower?

• To ensure the cold water runs out first

• To ensure the hot water runs out first

• To prevent air bubbles from forming

• To reduce water pressure

What is an alternative connection method to the cylinder mentioned in the diagram?

• Using a T-joint

• Using an Essex flange

• Using a Y-connector

• Using a straight pipe