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WorksheetsPP 8 Installation of Hot Water Pipework
Total questions: 39
Worksheet time: 20mins
Under which British Standard is the installation of hot water pipework covered?
British Standard 1057
British Standard 8558
British Standard 100°C
British Standard 95°C
Which materials are usually used for hot water pipes and fittings
PVC and rubber
Copper tubes to BS EN 1057 and polybutylene pipes
Steel and iron
Aluminium and zinc
What is the maximum temperature that hot water should never be allowed to reach in the pipework?
95°C
100°C
105°C
85°C
The pipework should be capable of withstanding how many times the normal operating pressure of the system?
One time
One and a half times
Twice
Three times
How are the installation methods for low pressure hot water systems compared to those for low pressure cold water systems?
Completely different
Very similar
Not related
Only similar in the use of materials
What should be ensured when pressure testing open-vented cylinders?
That the temperature is consistent
That the cylinder is fully operational
That the maximum pressure the cylinder can withstand is not exceeded
That the cylinder is disconnected
What should be done if necessary before pressure testing commences?
The cylinder should be heated up
The cylinder should be disconnected and the pipework capped
The pipework should be replaced
The pressure should be increased
Why should care be taken when installing hot and cold water pipework side by side?
To prevent the hot water pipework from cooling down
To ensure easy maintenance
To avoid the cold water installation being adversely affected by the hot water pipework
To make the installation look more organized
What types of pipes have different soundness tests according to the provided plumbing material?
PVC and PEX
Rigid pipe (copper) and plastic pipe
Steel and iron
Flexible hose and rigid hose
What is the first step in the process of testing and decommissioning according to the Level 2 Technical Certificate in Plumbing?
Set up equipment
Visual inspection
Test period
Final check
How long should the test pressure be maintained during the hydrostatic pressure testing of metal piping systems?
5 minutes
10 minutes
15 minutes
20 minutes
What should be done if there is a pressure loss during the hydrostatic pressure test?
Stop the test immediately
Reduce the test pressure
Maintain the test pressure until leaks are identified
Increase the test pressure above the maximum design pressure
What is the test pressure (TP) set to during a hydrostatic pressure test of metal piping systems?
Equal to the maximum design pressure (MDP)
1.1 x MDP
0.9 x MDP
2 x MDP
What is the first step in the hydrostatic pressure testing procedure of plastic piping systems for water tightness?
Fill the system with water
Arrange for the system to be vented
Apply the selected test pressure
Check visually for leaks
What should the test pressure (TP) be set to during the hydrostatic pressure testing of plastic piping systems?
0.5 x MDP (maximum design pressure)
1.0 x MDP (maximum design pressure)
1.1 x MDP (maximum design pressure)
2.0 x MDP (maximum design pressure)
How long should the pressure be maintained after reducing it during the hydrostatic pressure test?
15 minutes
20 minutes
30 minutes
45 minutes
What indicates that the plastic piping system is leak-tight after reducing the pressure in the hydrostatic pressure test?
The pressure is below 0.5 x the operating pressure
The pressure is equal to or greater than 0.5 x the operating pressure
No visual leaks are detected
The pressure is equal to or greater than 1.0 x the operating pressure
What is the requirement of the British Standards regarding the flushing of hot water systems?
Flushing with dirty water
Flushing with clean water, direct from the water undertaker's main supply
Flushing is not required
Flushing with recycled water
What is the purpose of flushing the systems as per the installation standards?
To test the water pressure
To make the water taste better
To remove potential contaminants like flux residues, PTFE, excess jointing compounds, and swarf
To check for leaks
What indicates that the system has been properly flushed?
The water runs with slight discoloration
The water runs completely clear and free of any discoloration
The water runs with a strong chemical smell
The water temperature increases
What should be done with hot water storage vessels and cold water storage cisterns during system flushing?
They should be filled to the brim
They should be insulated
They should be drained down completely
They should be disconnected
What should be done after refilling the system during the flushing and disinfecting process?
Add disinfectant to the system immediately.
Open the kitchen tap and allow water to run until clear of debris/colour.
Drain the system from the highest point.
Close all taps and outlets and leave the system for 1 hour.
For how long should disinfectant be added to the system during the disinfecting process?
30 minutes
1 hour
2 hours
Until the water runs clear
What should be checked to ensure that they are operating correctly after the hot water system has been filled and flushed?
Only the flow rates
Only the water temperatures
Thermostats and high-limit thermostats
Thermostats, high-limit thermostats, flow rates, pressures, and water temperatures
Against what should the flow rates, pressures, and water temperatures be checked after ensuring the correct operation of thermostats and high-limit thermostats?
The manufacturer's instructions
The system's initial design
The local plumbing codes
The personal judgment of the technician
What instrument is used to measure flow rate in plumbing checks?
Pressure gauge
Weir cup
Thermometer
Stopwatch
What should be done to ensure draw-off points are functioning correctly?
Lubricate all draw-off points
Open all draw-off points making sure they open and shut off properly
Close all draw-off points tightly
Inspect visually without operating
What is the method for checking pressure in plumbing checks?
Using a thermometer
Using a flow meter
Using a pressure gauge
Using a level
What is the responsibility of a plumber regarding thermostats and TMV's
Replace all thermostats regularly
Ensure correct temperature setting and inform customer
Disconnect thermostats when not in use
Install new thermostats at every visit
What should be handed over to the customer once the plumbing system has been 'proved'?
Manufacturer's instructions, benchmark certificate, warranty
User manual, service agreement, receipt
Installation guide, quality assurance certificate, product registration
Operating manual, compliance document, guarantee
What is the purpose of walking the customer around the system after it has been 'proved'?
To show them where the system can be upgraded
To demonstrate how to dismantle the system
To show them all the settings and valves
To instruct them on how to install additional components
What is the first step in decommissioning a hot water system for maintenance and replacement of components?
Heat source safely isolated
Customer informed
Warning notice placed on heat source
Fuses removed
What should be done to the heat source during the decommissioning of a hot water system?
Customer informed
System drained to safe location
Heat source safely isolated
Open ends capped
During the decommissioning process, what is placed on the heat source as a safety measure?
Fuses removed
Customer informed
Open ends capped
Warning notice placed on heat source
What is important for decommissioning a hot water system?
think legionella
(a)
During the process of temporary decommissioning, how is the water in the system discharged?
The system is refilled and tested.
The customer is informed.
The part is replaced.
A hose pipe is connected to a suitable drain point and the water is discharged to a below-ground drain.
When is the customer informed during the temporary decommissioning process?
After the system is refilled and tested.
Before the system is safely isolated and labeled.
After the hose pipe is connected to the drain point.
Both before the process begins and after it is completed.
What is the recommended solution for poor pressure in plumbing due to a low cold water feed/storage cistern?
Check and test the thermostat and energy cut-out and replace
Check the cold feed connection and the hot water draw-off and descale as required
Raise the cistern to increase the distance to hot water outlets
Failure of the immersion heater thermostat and energy cut-out
What should be checked if there is very hot water discharging into the cold water feed/storage cistern from the open vent?
The cold feed connection and the hot water draw-off
The distance between the cistern and hot water outlets
The immersion heater thermostat and energy cut-out
The level of the cold water feed/storage cistern
