WorksheetsCold Water System Basics
Total questions: 28
Worksheet time: 14mins
What is the minimum requirement for a water supply outlet in each dwelling?
One cold water tap
Two cold water taps
One hot water tap
Two hot water taps
In a home, where is the potable water supply outlet normally located?
Kitchen sink
Bathroom sink
Garden hose
Laundry room
Where must drinking water be provided in addition to homes?
Public parks
Shopping malls
Schools
Offices
How can outlets be connected to the mains water supply?
A Directly
B Indirectly
Both A and B
None of the above.
What type of valve should the water supply terminate with when entering a property?
Screw-down stop valve
Lever action valve
Spherical plug valve
Flanged gate valve
The water main should be between _______ mm and _______ mm below ground.
The water main should be between 750 mm and 1350 mm below ground.
The water main should be between 250 mm and 435 mm below ground.
The water main should be between 800 mm and 1200 mm below ground.
The water main should be between 325 mm and 675 mm below ground.
According to the diagram, how far should the water main be from the building wall?
.75 meter
2 meters
3 meters
4 meters
What is the source of water for all cold water taps in a direct cold water system?
The main water supply
A water tank
A well
A reservoir
Which type of cold water system is most commonly used in modern domestic properties?
Gravity-fed system
Direct system
Indirect system
Combination system
What is one advantage of a direct cold water system?
It provides a stored supply of water.
It is more energy efficient.
It requires less maintenance.
It is cheaper to install.
What is the typical size of the cistern used for supplying cold water to the hot water cylinder in a direct cold water system?
100-litre
150-litre
200-litre
250-litre
In a direct cold water system, when is a feed cistern not necessary?
When the hot water is supplied via a combi boiler
When the incoming pressure is high
When the hot water is supplied via a storage tank
When the cold water is supplied directly from the mains
Fill in the blank: In a direct cold water system, both hot and cold water supplies are now fed directly from the _______.
mains
tank
reservoir
well
What is the recommended pipe size for a rising main to supply most cold water demands for a three-to-four bedroom home?
10mm
15mm
20mm
25mm
If a hot water storage cylinder is installed, what size cold feed is required to the cylinder from a 150-litre cold water storage cistern?
15 mm
22 mm
28 mm
35 mm
Larger installations may require a ___ rising main, but this is dependent again on the system requirements.
22mm
15mm
28mm
35mm
What is the main function of the cold water storage cistern in an indirect system?
To store hot water for heating purposes
To provide a reserve of cold water for the system
To filter impurities from the water
To regulate the temperature of the water
In an indirect system, the cold water main feeds the outlets indirectly via a cold water storage cistern. True or False?
True
False
Which of the following statements is true about indirect systems?
The cold main connects directly to the outlets.
The cold main connects to the cistern in the roof space.
All outlets are directly fed from the main.
What is the minimum capacity for the water cistern in an indirect water system?
150 liters
100 liters
175 liters
200 liters
In the indirect water system diagram, which component is fed directly from the main?
Cold Water Storage Cistern
Hot Water Cylinder
Boiler
Expansion Vessel
What must all appliances, whether a bath, wash hand basin, or dishwasher, be provided with?
A means of isolation
A water filter
A heating element
A drainage system
What type of valve is most suitable for providing isolation to appliances?
Slotted ball valve
Pressure relief valve
Check valve
Gate valve
Flexes for WC and wash hand basin connections may have built-in ________ or they may be installed separately on rigid pipework.
service valves
pressure regulators
flow restrictors
check valves
What is the usual pipe size for connecting washbasins?
10mm
15mm
20mm
25mm
Which of the following is a method of boosting cold water?
A Direct boosting systems
B Indirect boosting systems
Both A and B
None of the above
Where is a storage cistern typically located in a building?
Basement
Roof
Garden
Garage
Fill in the blank: A Float Operated Valve is used to control the _______ in a cistern.
water level
pressure
temperature
flow rate
