WorksheetsPPT 3 - Pipework & Circulation COL
Total questions: 15
Worksheet time: 8mins
What is the primary function of a vent pipe in a plumbing system?
To increase water pressure
To act as a safety relief if the system overheats
To filter impurities from water
To reduce noise in the pipes
What type of valve is used in a direct plumbing system for full-way control?
Ball valve
Check valve
Gate valve
Pressure valve
Where should the vent pipe be located in relation to the cold feed cistern?
Below the cold feed cistern
At the same level as the cold feed cistern
Above the cold feed cistern in the roof space
Inside the cold feed cistern
How far should the vent pipe terminate above the top of the float valve?
At least twice the internal diameter of the vent pipe
At least the same as the internal diameter of the vent pipe
At least half the internal diameter of the vent pipe
At least three times the internal diameter of the vent pipe
What is the formula to determine the minimum height of the top of a vent pipe above the top of the overflow pipe?
V = 0.04H + 0.15
V = 0.15H + 0.04
V = 0.04H - 0.15
V = 0.15H - 0.04
In what type of circulation system does the minimum height of the vent pipe apply?
Gravity circulation systems
Forced circulation systems
Closed loop systems
Open loop systems
According to British Standards, what should be done if valves are found on the route of the vent pipe?
They must be removed
They must be replaced
They must be adjusted
They must be left as is
What causes one-pipe circulation in plumbing systems?
Hot water rising and cooling near the pipe walls
Cold water rising and heating near the pipe walls
Hot water remaining static in the pipe
Cold water circulating without heating
What is the minimum distance the hot water distribution pipe must be from the top of the cylinder to the vent?
300mm
450mm
600mm
750mm
What is the purpose of having a rise in the pipework?
To increase water pressure
To allow air to escape via the vent pipe
To decrease water temperature
To reduce pipe length
What is used to minimize heat loss in the plumbing system according to Building regulations part 'L'?
Ventilation
Insulation
Filtration
Evaporation
Why is it important to control the length of pipe used to deliver hot water to the outlet?
To increase water pressure
To avoid waste of cold water and cooling of hot water
To reduce noise
To prevent pipe corrosion
According to British Standards, what is the maximum length of a pipe with a diameter of 12–22mm before it becomes a 'dead leg'?
8m
12m
3m
15m
Why must passive dead legs be kept to a minimum length?
To save energy
To prevent Legionella and bacterial growth
To increase water pressure
To reduce noise in the pipes
Where does the return pipe enter the cylinder in a secondary circulation system?
At the top of the cylinder
At the bottom of the cylinder
Approximately one-third of the way down
Halfway down the cylinder
