Worksheets214 ppt6 Fluid Categories Quiz
Total questions: 42
Worksheet time: 21mins
What is an example of Fluid Category 1?
Hot water in cylinder
Mains water
Primary water
Washing machines
Which fluid category represents a significant health risk?
Category 1
Category 2
Category 4
Category 5
What type of fluids are included in Fluid Category 5?
Wholesome water
Water with slight health risk
Water with significant health risk
Water with severe health risk
Which of the following is an example of Fluid Category 3?
Mains water
Primary water
Urinal water
Washing machines
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 main purpose of a backflow prevention device in plumbing?
To prevent water from flowing backwards into the main supply
To increase water pressure in the system
To filter impurities from the water
To regulate the temperature of the water
What can cause water to flow backwards in a plumbing system?
Sudden loss of pressure at the water main
Increase in water temperature
Presence of impurities in the water
Excessive water usage
What causes water to flow back towards the water main in a backflow prevention system?
Increased pressure in the main
Gravity due to zero pressure in the main
High temperature in the system
Chemical reaction in the pipes
What can cause a sudden loss of pressure in a water system?
A closed valve
A burst on the water undertaker’s main
A clogged pipe
A faulty water meter
What is one type of non-mechanical backflow protection?
Single check valve
Double check valve
Air gap
Pressure regulator
According to the Water Regulations, who is responsible for installing proper backflow protection?
The homeowner
The plumber
The architect
The city inspector
Which of the following is NOT a concern for a customer regarding backflow?
Dirty bath water in the kitchen tap
WC water in the bath taps
Outside tap water in the CWSC
Clean water in the garden hose
What type of valve must be installed to protect category 1 water from category 2 water?
Ball valve
Single check valve
Gate valve
Butterfly valve
Where should a single check valve be installed in a plumbing system?
After the outlet
Immediately prior to a mixer tap
At the water source
In the drainage system
What is the purpose of a Type EB non-verifiable single check valve in plumbing?
To protect the mains cold water supply
To increase water pressure
To filter impurities from water
To heat the water
In the context of plumbing, what does a single check valve do?
Prevents backflow of water
Increases water flow speed
Reduces water temperature
Adds minerals to water
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 an air gap
On a filling loop for a heating system
Inside a water heater
In a sewage system
What is the purpose of a non-verifiable double check valve in plumbing?
To increase water pressure in cat 2 system
To prevent backflow of cat 3 contaminated water
To reduce cat 1 water temperature
To enhance cat 5water flow speed
Where should the tap outlet be positioned to avoid 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 a potential risk if the tap outlet is below the spillover level of the basin?
Increased water pressure
Contact with contaminated water
Reduced water flow
Higher water temperature
What is installed to prevent chlorinated water from contaminating wholesome water in a domestic environment with a swimming pool?
RPZ valve
Ball valve
Gate valve
Check valve
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
Which of the following is NOT a place where air gaps are found?
Basins
Sinks
Radiators
Shower hoses
What does CWSC stand for in plumbing?
Cold Water Storage Cistern
Central Water Supply Control
Continuous Water Supply Channel
Controlled Water Safety Check
What is the height of the AUK1 air gap?
300mm
250mm
200mm
150mm
What does the AG air gap measure?
Height from the critical water level to the FOV outlet
Height from the WC pan spillover to the cistern spillover
Height from the floor to the ceiling
Height from the overflow to the water level
What is the required distance between the float valve connection and the water level in an air gap system?
50mm
25mm
75mm
100mm
How much distance should be maintained between the FOV and the overflow in an air gap system?
10mm
25mm
50mm
75mm
What is the distance between the overflow and the water level in an air gap system?
15mm
25mm
35mm
45mm
What is an AUK3 air gap?
A gap between the outlet of a tap and the spillover level on a sink.
A gap between the sink and the floor.
A gap between the tap and the wall.
A gap between two taps.
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
Which regulations cover the protection of pipework from freezing and undue heat?
Water Regulations, BSEN806, and BS8558
Plumbing Code, BSEN900, and BS7000
Building Standards, BSEN500, and BS6000
Safety Regulations, BSEN100, and BS2000
What is one of the five main areas of the Water Regulations?
Protecting water from contamination
Increasing water pressure
Increasing water usage
Enhancing water taste
Why is the correct use and positioning of backflow devices important to a plumber?
To prevent water contamination
To increase water temperature
To reduce water flow
To enhance water color
What is meant by backflow?
The flow of water in the intended direction
The reverse flow of water into the clean water supply
The process of water filtration
The increase in water pressure
What is meant by back siphonage?
The forward flow of water
The process of water heating
The reverse flow of water due to a drop in pressure
The increase in water temperature
Which device is used to protect against a water category 2 backflow?
Air gap
Double check valve
Pressure relief valve
Water filter
Which device is used to protect against a water category 3 backflow?
Reduced pressure zone device
Single check valve
Air gap
Water softener
Which device is used to protect against a water category 4 backflow?
Air gap
Double check valve
Pressure relief valve
Water filter
What is the air gap in a basin?
The space between the water outlet and the flood level rim
The distance between the faucet and the sink
The gap between the pipes
The space between the wall and the basin
