NEW
Font size
Worksheets9189PH3HWPPT3
Total questions: 40
Worksheet time: 20mins
Why is testing and commissioning a hot water system considered important?
It is a legal requirement.
It proves the correct and effective operation of the system.
It is only necessary for large systems.
It is a manufacturer's preference.
What must the system comply with during testing and commissioning?
Only the manufacturer’s instructions.
Only the regulations.
Both the manufacturer’s instructions and the regulations.
The personal preferences of the technician.
What is the outcome of correct commissioning and set-up of a hot water system?
It guarantees the system will never need repairs.
It ensures the system meets aesthetic standards.
It makes the system work to the specification or fail to meet the requirements.
It increases the energy consumption of the system.
What can incorrect commissioning, system flushing, system set-up, and poor maintenance lead to in a plumbing and domestic heating system?
Improved system performance
Decreased energy costs
System's performance issues and health implications
Faster water heating
Which of the following documents is NOT mentioned as one to be followed for testing and commissioning in plumbing and domestic heating?
The Water Supply (Water Fittings) Regulations
BSEN806 (and BS8558)
Approved Document G3
The Plumbing and Heating Installation Manual
During a visual inspection of a plumbing system, what should be inspected regarding the expansion vessel?
Check the color of the expansion vessel.
Check the pre-charge in the expansion vessel if not required.
Check the pre-charge in the expansion vessel if required.
Check the expansion vessel for decorative purposes.
Why should the system be filled in stages during the initial fill process?
To allow the cistern to fill to capacity
To ensure maximum pressure
To allow checks for leaks
To ensure the correct operation of valves
What is the purpose of filling an open vented system slowly and methodically?
To check the pre-charge pressure in the expansion vessel
To ensure maximum pressure and avoid airlocks
To test the D1 and D2 valves
To draw water from each hot outlet
Before filling an unvented system, what should be checked?
The temperature of the water
The pressure relief valves
The pre-charge pressure in the expansion vessel
The capacity of the cistern
What should be done to ensure the correct operation of temperature and pressure relief valves in an unvented system?
Open all hot taps and fill the system
Briefly open them to test their correct operation
Fill the cistern to capacity
Draw water from each hot outlet
What should be done once the system is filled according to the initial fill procedure?
The system should be left as it is.
A thorough visual inspection should be conducted.
The system should be immediately used.
The system should be drained and refilled.
What is the next step after conducting a visual inspection during the initial fill procedure?
Begin using the system for its intended purpose.
The system should be ready for pressure testing.
The system should be emptied and checked for leaks.
The system should be painted.
Where are the procedures for soundness testing outlined?
In the Water Supply (Water Fittings) Regulations and BSEN806.
Only in the Water Supply (Water Fittings) Regulations.
Only in BSEN806.
In the manufacturer's manual.
Under British Standards, what must be used to flush each system irrespective of its size or type?
A) A chemical cleaning agent
B) Clean water directly from the mains
C) A mixture of water and antifreeze
D) Distilled water
What additional step may be included when flushing water from every outlet until clear?
A) Adding a coloring agent to the water
B) Heating the system up to temperature and flushing through
C) Using a filtration device while flushing
D) Flushing twice with a time gap
According to BSEN806 Part 4 6.2.1, when should the installation be flushed with drinking water?
A) After the system has been in use for a month
B) As soon as possible after installation and pressure tested immediately before commissioning
C) Before the installation process begins
D) Once every year as part of maintenance
According to BSEN806 Part 4 6.3.1, in which scenario is disinfection usually not necessary?
In public buildings
For single dwellings and minor extensions or alterations in a premise
When the water system has been unused for a long period
In commercial premises
What initial concentration of chlorinated water should be used to fill the system for disinfection?
30ppm
50ppm
100ppm
20ppm
How long should the system be filled with chlorinated water at the initial concentration for the disinfection process?
30 minutes
1 hour
2 hours
24 hours
What is the indicator of a successful disinfection process after one hour?
The free residual chlorine level is no less than 50ppm
The free residual chlorine level is no less than 30ppm
The free residual chlorine level is no more than 30ppm
The free residual chlorine level is no more than 50ppm
What should be done once the plumbing system is filled and flushed correctly?
The system should be drained and refilled.
The system should be heated to temperature.
The system should be left alone for a few hours.
The system should be immediately tested for leaks.
What is used to measure the flow rates at each outlet?
A pressure gauge
A flow/weir cup
A thermometer
A stopwatch
How are flow rates measured?
In gallons per hour
In cubic meters per second
In litres per minute
In barrels per day
What is placed on each individual outlet to show the pressure in the system?
A flow/weir cup
A thermometer
A pressure gauge
A stopwatch
What instrument is used to check outlet temperatures according to the learning material?
Pressure gauge
Weir cup
Thermometer
Flow meter
What should be done with the readings of flow rates, pressure, and temperature after they are taken?
They should be discarded.
They should be kept for a short period and then discarded.
They should be recorded and included in the Benchmark certificates, compiled, and handed over to the customer.
They should be kept confidential and not shared with the customer.
Why is it important to keep a record of all the details regarding flow rates, pressure, and temperature readings?
To ensure the system is decommissioned properly.
To provide evidence for legal disputes.
To make sure the system continues to meet the design specification during maintenance and repair.
To use them for marketing purposes.
Which of the following is NOT typically required information to be included in the commissioning process of plumbing and domestic heating systems?
Date, time and name of commissioning engineer
Location of the installation
Color of the pipes used in the installation
Manufacturer, and type of equipment and components
What type of readings should be taken from the outlets during the commissioning process?
Electrical conductivity readings
Flow and pressure readings
Sound level readings
Air quality readings
Who should sign the Benchmark certificate?
The customer
The apprentice
The commissioning engineer
The supplier
When commissioning a hot water system, what can sometimes be identified?
Customer preferences
System enhancements
Faults within the system
New regulations
Why is the customer considered an important source of information when identifying faults in a hot water system?
They provide the warranty information.
They describe the fault and its characteristics.
They are responsible for the repair costs.
They have technical knowledge about the system.
Who can be consulted if the booster pumps and accumulators are incorrectly set up?
The system designer.
The local plumbing authority.
The manufacturer's technical team.
The building manager.
What can incorrectly clipped pipework lead to in high pressure systems?
Decreased water flow
Improved system performance
Water hammer and component failure
Quieter operation
According to the Water Supply (Water Fittings) Regulations, what is the maximum water flow speed to avoid noise?
1m/s
2m/s
3m/s
4m/s
When should a leakage have been detected in a property?
After health problems occur
During a soundness test
Once visible damage is present
After the mould has grown
What should be checked to ensure the incorrect temperature fault is avoided?
Water pressure
Electrical circuits
Thermostats settings
Pipe insulation
What should be included in the file handed over to the customer after the installation of a system?
Warranty and insurance documents
Manufacturer's installation, operation and servicing manuals
A list of potential future customers
Marketing materials for other services
What should be checked with the customer regarding the controls of the system?
If the color matches their preference
If the controls are easy to use
If the timings on the controls suit their requirements
If the controls are brand new
What should be provided to the customer when outlining the maintenance and servicing requirements?
A discount for future services
Your contact details
A list of competitor service providers
A brochure of new products
