Unit 331/ 13 Apply design techniques – calculate component size

Multiple Choice

Which of the following is NOT typically considered a component of a cold water system in a single-occupancy dwelling?

• Cisterns

• Pipework

• Radiators

• Pressure vessels

Multiple Choice

Which British Standard replaced BS 6700 for the design, installation, testing, and maintenance of services supplying water for domestic use within buildings?

• BS EN 806 and BS EN 8558

• BS EN 1234 and BS EN 5678

• BS EN 9001 and BS EN 14001

• BS EN 1020 and BS EN 2040

Multiple Select

Which of the following are key points to consider from page 57 of BS 6700 regarding pipe sizing?

• Rate of flow in litres per second

• Maximum velocity of 3.0 m/s

• Use of a weir gauge flow cup

• Pipe material color coding

Multiple Choice

According to BS 6700, what is the maximum velocity that water should travel in pipework?

• 2.0 m/s

• 3.0 m/s

• 4.0 m/s

• 5.0 m/s

Multiple Choice

According to the rule of thumb for everyday domestic pipe runs, what pipe sizes are recommended for supply main and distribution pipework?

• 15 or 22mm for supply main, 22 or 28mm for distribution

• 22 or 28mm for supply main, 15 or 22mm for distribution

• 15 or 28mm for supply main, 22 or 22mm for distribution

• 28 or 22mm for supply main, 15 or 28mm for distribution

Multiple Choice

Based on the table of loading units, which appliances have a loading unit value of 3?

• Shower, Sink tap 1/2, Domestic clothes or dishwashing machines

• WC flushing cistern, Bath tap 3/4, Sink tap 3/4

• Wash basin 1/2, Bath tap 1, Shower

• Toilet, Sink tap 1/2, Bath tap 1

Multiple Choice

What is the total number of loading units calculated for the installation in the example, and which appliance contributes the most to this total?

• 57, Bath

• 57, Shower

• 50, Bath

• 57, Toilet

Multiple Choice

What is the approximate flow rate in litres per second as shown on the chart?

• 0.86 l/s

• 1.2 l/s

• 0.5 l/s

• 1.0 l/s

Multiple Choice

After determining the total loading units and the design flow rate, which columns will you use on the next chart according to the instructions?

• 2, 4, and 5

• 1, 3, and 5

• 2, 3, and 4

• 1, 2, and 4

Multiple Choice

Which two columns must be aligned using the rule before reading the figure in column 5 to determine the size for the incoming main?

• Column 2 and Column 4

• Column 1 and Column 3

• Column 3 and Column 5

• Column 2 and Column 5

Multiple Choice

What is the required diameter for the incoming main pipe if the reading is above 22mm but below 28mm?

• 15mm

• 18mm

• 22mm

• 28mm

Multiple Choice

Based on the installation diagram, which appliances are located on the first floor?

• Toilet and Basin

• Bath, Basin, and Toilet

• Shower and Sink

• Washing machine and Basin

Multiple Choice

Calculate the total loading units for the installation using the given table. What is the total?

• 20

• 35

• 50

• 60

Multiple Choice

What are the main components of a cold water system in a single-occupancy dwelling that you should be able to calculate the size for after this session?

• Cisterns, pipework, pumps, pressure vessels

• Boilers, radiators, thermostats, valves

• Taps, sinks, showers, toilets

• Heaters, filters, faucets, drains