Hot Water Cylinders Quiz

What is the key difference between an indirect hot water cylinder and a direct hot water cylinder?

• An indirect cylinder is heated by immersion heaters, while a direct cylinder is heated by the boiler.

• A direct cylinder has a heat exchanger coil, while an indirect cylinder does not.

• An indirect cylinder is heated by the boiler, while a direct cylinder is heated by immersion heaters.

• There is no difference; both are heated by the boiler.

What is the purpose of an airlock in a primatic hot water cylinder?

• To separate the primary flow and return connections.

• To separate the hot water draw-off from the cold feed.

• To separate the primary and secondary waters.

• To heat the water more efficiently.

Which component is common to both indirect and direct hot water cylinders?

• Immersion heater connection

• Heat exchanger coil

• Airlock

• Cold feed connection

What is a combination cylinder?

• A cylinder that combines both heating and cooling systems.

• A cylinder that operates only under high pressure.

• A combination cylinder with a small cold-water cylinder attached.

• A cylinder used exclusively for storing cold water.

What is the purpose of a thermal store in plumbing systems?

• To store cold water for domestic use.

• To generate electricity for the heating system.

• To work under main pressure and in reverse to a standard indirect cylinder.

• To filter impurities from the water before heating.

Where is the circulating pump placed in a secondary circulation system?

• At the top of the hot water cylinder.

• At the bottom of the cold water cylinder.

• Close to the hot water cylinder, pumping into the vessel.

• Outside the building to prevent noise.

What material should the pump be made from in secondary circulation systems to prevent corrosion?

• Plastic

• Aluminum

• Bronze or stainless steel

• Cast iron

What is the function of the factory-fitted cold feed connection in a combination cylinder?

• To allow for the expansion of hot water.

• To provide a connection for the secondary return.

• To supply cold water to the cylinder for heating.

• To connect the cylinder to the mains water supply.