WorksheetsHot Water - PPT 8 - Install hot water systems and components
Total questions: 34
Worksheet time: 17mins
Which British Standard covers the installation of hot water pipework?
BS EN 1057
British Standard 8558
BS EN 1234
British Standard 9001
Which British Standard covers plumbing materials, like copper tubes and plastic pipework?
BS EN 1057
British Standard 8558
BS EN 1234
British Standard 9001
What materials are usually used for hot water systems to prevent contamination?
PVC pipes
Copper tubes and polybutylene pipes
Steel pipes
Aluminum tubes
What is the maximum temperature hot water should reach in these systems?
100°C
95°C
90°C
85°C
The pipework should withstand how many times the normal operating pressure?
One time
One and a half times
Two times
Three times
What is a key consideration when installing hot and cold water pipework side by side?
Ensuring the hot water pipework is above the cold water pipework
Ensuring the cold water installation is not adversely affected by the hot water pipework
Ensuring both pipeworks are of the same material
Ensuring the hot water pipework is insulated
What should be done before pressure testing open-vented cylinders?
Increase the pressure gradually
Ensure the cylinder is full of water
Ensure the maximum pressure the cylinder can withstand is not exceeded
Ensure the cylinder is empty
What action should be taken if necessary before testing commences?
Increase the water temperature
Disconnect the cylinder and cap the pipework
Fill the cylinder with water
Insulate the pipework
What should you visually check for before conducting soundness testing in plumbing?
The color of the pipes
The temperature of the water
For open ends, soldered joints, tight compression joints, and clips in place
The length of the pipes
What types of pipes require different soundness tests according to the document?
Metal and glass pipes
Rigid pipe (copper) and plastic pipe
Flexible and rigid pipes
Steel and aluminum pipes
What is the first step in the testing and decommissioning process?
Set up equipment
Test period
Visual inspection
Final check
What is the first step in the hydrostatic pressure testing of metal piping systems?
Apply the test pressure
Slowly fill the system with water
Arrange for the system to be vented
Check for leaks
How long should the test pressure be applied using a hydraulic test bucket? [Metal Pipework]
5 minutes
10 minutes
15 minutes
20 minutes
What should be done if there is a pressure loss during the test?
Stop the test immediately
Increase the pressure
Maintain the system at the test pressure until leaks are identified
Decrease the pressure
What should be done after filling the system with water during the hydrostatic pressure test?
Apply the selected test pressure.
Check visually for leaks.
Reduce the pressure by bleeding water.
Seal all air vents and outlet valves.
How long should the test pressure be applied using the hydraulic test bucket? [Plastic pipework]
15 minutes
45 minutes
30 minutes
60 minutes
What indicates a leak in the system during the visual check?
Increase in pressure
Pressure drop
Constant pressure
Temperature rise
Why should hot water systems be flushed as soon as possible after installation?
To increase water pressure
To remove potential contaminants
To improve water taste
To reduce water temperature
What should be done to ensure the water runs completely clear and free of discoloration?
Use a water filter
Fill the system and run water at every outlet
Add cleaning chemicals
Increase water temperature
How long should disinfectant be added to the system during the flushing and disinfecting process?
30 minutes
2 hours
1 hour
15 minutes
Which disinfectant is used to flush the system?
Sodium chloride
Sodium hypochlorite solution or Chlorine
Hydrogen peroxide
Ammonia
Why should thermostats and high-limit thermostats be checked?
To ensure they are not damaged.
To ensure they are operating correctly.
To ensure they are turned off.
To ensure they are replaced regularly.
What should be checked against the specification and manufacturer’s instructions?
The color of the water.
The flow rates, pressures, and water temperatures.
The size of the pipes.
The type of heat source.
What tool is used to measure flow rate?
Pressure gauge
Weir cup
Thermometer
Hydrometer
How should pressure be checked ?
Using a thermometer
Using a pressure gauge
By visual inspection
By listening for sounds
What should be handed over to the customer once the plumbing system has been proved?
User manual, installation guide, and warranty
Manufacturer’s instructions, benchmark certificate, and warranty
Installation guide, benchmark certificate, and user manual
Warranty, user manual, and installation guide
What is the first step in decommissioning a hot water system?
Heat source safely isolated
Customer informed
Fuses removed
System drained to safe location
Which of the following actions ensures safety during the decommissioning of a hot water system?
Leaving open ends uncapped
Placing a warning notice on the heat source
Keeping fuses intact
Leaving dead legs
If the float operated valve is stuck in the off position, what is the recommended solution?
Check and replace immersion heater
Check the boiler for correct operation
Check and clean or replace the float operated valve as necessary
Increase the temperature setting to 60°C
What should be done if the water is flowing cold due to immersion heater failure?
Drain down the cylinder and refill the system
Check and replace immersion heater
Check and open isolation valve/stop valve
Increase the temperature setting to 60°C
What is a recommended solution if the water is only lukewarm due to a thermostat issue?
Check and open isolation valve/stop valve
Drain down the cylinder and refill the system
Increase the temperature setting to 60°C and check the correct operation
Check and replace immersion heater
What is a probable cause of poor flow rate in plumbing systems?
Cold water feed/storage cistern too low
Cold feed pipe and/or hot water draw-off blocked with scale
Failure of the immersion heater thermostat
Incorrect pipe installation
What is the recommended solution for poor pressure due to a low cold water feed/storage cistern?
Descale the hot water draw-off
Raise the cistern to increase the distance to hot water outlets
Replace the immersion heater
Install a new thermostat
What should be checked and tested if very hot water is discharging into the cold water feed/storage cistern from the open vent?
Cold feed connection
Hot water draw-off
Thermostat and energy cut-out
Water pressure
