cold water ppt 2

Between which temperatures does Legionella bacteria thrive?

• 10°C and 20°C

• 20°C and 37°C

• 37°C and 50°C

• 5°C and 15°C

At what temperature does Legionella bacteria multiply rapidly?

• 20°C

• 25°C

• 37°C

• 40°C

What is the maximum temperature that cold water systems should be designed to prevent exceeding?

• 15°C

• 20°C

• 25°C

• 30°C

According to BS EN 806-2: 2005 Section 3, for how many years should all pipes and joints of a CW system be designed for a service life?

• 10 years

• 20 years

• 50 years

• 100 years

What is a sentinel outlet in a cold water system?

• The outlet closest to the water heater

• The outlet with the highest pressure

• The outlet furthest from the source of supply

• The outlet with the largest diameter

What should be done with low-use outlets in a cold water system?

• They should be insulated

• They should be disconnected and dead ends removed

• They should be painted

• They should be expanded

What is the minimum recommended capacity for a cistern supplying both hot and cold water in a small house?

• 100 litres

• 150 litres

• 230 litres

• 300 litres

For a large house, what is the recommended cistern capacity per bedroom?

• 50 litres

• 75 litres

• 100 litres

• 150 litres

Which of the following factors must be considered when ensuring correct pipe sizing?

• The color of the pipe

• The volume flow rate required

• The material of the pipe

• The temperature of the room

What is the recommended flow velocity range according to BS EN 806?

• 0.1m/s to 0.3m/s

• 0.5m/s to 2m/s

• 2.5m/s to 4m/s

• 3m/s to 5m/s