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

Fill in the Blanks

Fill in the blank: Table 3 in BS 6700 gives the rate of flow in

per second to various appliances.

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

Fill in the Blanks

Fill in the blank: According to the appliance supply table, a dishwasher is assumed to have a heating element and is supplied only with

water.

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

Fill in the Blanks

The reading for the pipe size is above

mm, but below 28 mm.

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