6035HWPPT2

Which of the following is NOT a type of cylinder mentioned in the components list?

• Direct

• Indirect

• Triple feed

• Double feed

Which type of cylinder is designed to recover heat quickly?

• Un-lagged cylinder

• High recovery cylinder

• Indirect cylinder

• Double feed cylinder

Explain why a pre-lagged cylinder might be preferred over an un-lagged cylinder in a heating system.

• Pre-lagged cylinders retain heat better, reducing energy loss.

• Pre-lagged cylinders are smaller in size.

• Pre-lagged cylinders are less expensive to manufacture.

• Pre-lagged cylinders require more maintenance.

Which of the following cylinder types does NOT require a vent?

• Unvented cylinder

• Direct cylinder

• Indirect cylinder

• Single coil cylinder

Which of the following is NOT a characteristic of a direct cylinder?

• It has a heat exchanger (coil) inside it.

• Water inside can be heated directly from the boiler.

• Water inside can be heated via an immersion heater.

• It offers no discoloration to the water when using immersion heaters.

What is the main disadvantage of heating water directly from the boiler in a direct cylinder?

• Lack of temperature control and discoloration of secondary water

• High energy efficiency

• Better temperature and time control

• No discoloration to the water

Why is the use of immersion heaters preferred over direct heating from the boiler in direct cylinders today?

• Immersion heaters offer better temperature and time control and prevent discoloration of water.

• Immersion heaters are less expensive to install.

• Immersion heaters require less maintenance.

• Immersion heaters use less electricity.

Explain how the method of heating water in a direct cylinder has evolved and the reasons for this change.

• The method has shifted from direct boiler heating to immersion heaters due to improved temperature and time control and elimination of water discoloration.

• The method has shifted from immersion heaters to direct boiler heating because of cost savings.

• The method has remained the same due to lack of technological advancements.

• The method has shifted to using solar panels for environmental reasons.

Which component in a direct cylinder system is responsible for heating the water?

• Immersion heater

• Cistern

• Primary flow pipe

• Drain off cock

What is the function of the thermostat in a direct cylinder system?

• To control the temperature of the water

• To drain water from the system

• To supply cold water to the cistern

• To heat the water directly