Hot Water Storage phase1 1.1 pt2

What is a key feature of Unvented Hot Water Storage Systems (UVHWSS)?

• They require a vent pipe.

• They require a storage cistern.

• They are supplied directly from the cold water mains supply.

• They have poor flow rates.

What problem can occur when filling a hot water storage system from a pressurised water supply?

• Improved water quality.

• Reduced water pressure.

• Problems with the boiling point and excessive water expansion.

• Increased energy efficiency.

What is the boiling point of water at atmospheric pressure?

• 100°C

• 120°C

• 135°C

• 150°C

At 1 bar pressure, what is the approximate boiling point of water?

• 100°C

• 120°C

• 135°C

• 150°C

What happens to the boiling point of water when the pressure is increased?

• It decreases

• It remains the same

• It rises

• It fluctuates

What is the boiling point of water at 2 bar pressure?

• 100°C

• 120°C

• 135°C

• 150°C

What could occur if a storage vessel ruptures at high pressure?

• Water will freeze

• Water will evaporate slowly

• Water will flash to steam causing an explosion

• Water will remain unchanged

What does the graph represent in terms of temperature and pressure?

• The relationship between temperature and volume.

• The relationship between temperature and bar pressure.

• The relationship between pressure and volume.

• The relationship between temperature and density.

At what temperature does the graph start at 0 bar pressure?

• 50°C

• 100°C

• 150°C

• 200°C

What is the approximate temperature at 5 bar pressure according to the graph?

• 120°C

• 140°C

• 160°C

• 180°C