WorksheetsPPT 6 - Installation and backflow prevention
Total questions: 27
Worksheet time: 14mins
Which fluid category represents wholesome water supplied from the water undertaker?
Category 1
Category 2
Category 3
Category 4
What is an example of a fluid in Category 2?
Mains water
Hot water in cylinder
Primary water
Urinal water
Which fluid category includes fluids representing a slight health risk and unsuitable for drinking?
Category 1
Category 2
Category 3
Category 5
Fluids containing toxic substances like microorganisms and pesticides fall under which category?
Category 1
Category 3
Category 4
Category 5
Which category includes fluids with a severe health risk, containing pathogenic organisms and radioactive matter?
Category 2
Category 3
Category 4
Category 5
What is backflow in plumbing?
Water flowing in the intended direction
Water flowing in the opposite direction
Water being heated
Water being filtered
What causes back siphonage in plumbing systems?
Positive pressure
High temperature
Negative pressure (sucking)
Water filtration
What is the purpose of a backflow prevention device in plumbing?
To allow water to flow backwards
To prevent water from flowing backwards
To increase water pressure
To decrease water pressure
What can cause water to flow backwards in a plumbing system?
Increase in water pressure
Sudden loss of pressure at the water main
High temperature
Low temperature
According to the Water Regulations, who is responsible for installing proper backflow protection?
The homeowner
The plumber
The city council
The architect
What are the two types of backflow protection mentioned?
Chemical and biological
Mechanical and non-mechanical
Electrical and manual
Hydraulic and pneumatic
Which of the following is a non-mechanical form of backflow protection?
Single check valve
Double check valve
Air gap
Pressure regulator
What type of valve must be installed to protect category 1 water from category 2 water?
Double check valve
Single check valve
Pressure relief valve
Ball valve
Where should a single check valve be installed in a plumbing system?
After the outlet
Before the outlet
At the water source
At the water meter
What type of valve must be installed to protect wholesome water from a filling loop on a combination boiler?
Single check valve
Double check valve
Pressure relief valve
Ball valve
Where would a double check valve typically be used?
Under a sink with no air gap
On a roof
Inside a refrigerator
In a car engine
Where should the tap outlet be positioned to prevent contamination?
Above the spillover level of the basin
Below the spillover level of the basin
At the same level as the spillover
Far away from the basin
What is the purpose of installing an RPZ valve in a domestic environment?
To prevent chlorinated water from contaminating wholesome water
To increase water pressure in the system
To filter impurities from drinking water
To regulate the temperature of water
What is the purpose of maintaining an air gap in plumbing systems?
To prevent contamination
To increase water pressure
To reduce water temperature
To enhance water flow
What is the height of the AUK1 air gap?
300mm
250mm
200mm
150mm
What does the AG air gap measure?
Height from the warning pipe to the FOV outlet
Height from the WC pan spillover to the cistern spillover
Distance between the overflow and water level
Distance between the FOV and overflow
How far should the overflow be from the water level in an air gap system?
50mm
25mm
75mm
100mm
What is AUK3 in plumbing?
A gap between the outlet of a tap and the spillover level on a sink.
A type of faucet used in kitchens.
A measurement of water pressure in pipes.
A type of sink installation method.
What is used to prevent flexible shower hoses from being submerged in bathwater?
A metal clamp
A rubber restrainer
A plastic cover
A wooden block
What is one of the five main areas of the Water Regulations?
Increasing water temperature
Protecting wholesome water from contamination
Reducing plumbing costs
Enhancing water taste
What is the air gap classification for a basin?
AUK2
AUK1
AG
RPZ
What is the air gap classification for a WC cistern?
AUK1
AUK2
AG
RPZ
