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WorksheetsLevel 2 Cold Water
Total questions: 56
Worksheet time: 28mins
Water is a simple compound consisting of which two elements?
Helium and argon
Carbon dioxide and oxygen
Hydrogen and oxygen
Helium and oxygen
How old roughly is the water on Earth?
3.2 billion years
4.1 billion years
5.2 billion years
4.2 billion years
What is the scientific term for the 'water cycle'?
Microhydro cycle
Hydrological cycle
Heliological cycle
Evapological cycle
Of all the water on earth, which percentage is saline and which is fresh?
97% saline 1% fresh
97% saline 3% fresh
69% saline 31% fresh
97% fresh 3% saline
In litres how much is the fresh water supply for the world?
1350 trillion litres
1350 billion litres
1350 million litres
1530 trillion litres
Which UK agency oversees the watercourses in the UK?
Environment Agency
OFGEN
OFWAT
OFCOM
What is an artesian spring or well?
Water that is pumped from the water bearing rock layer
Water that comes from a shallow well from the first water bearing strata
Water that rises from underground water bearing rock layers under its own pressure, if its well head is below the water table
Man made wells that are dug to a water bearing rock layer
What is a borehole?
Man made wells that are drilled directly to a below groundwater source and the water extracted for use if the connection to a water main is difficult?
Man made wells that are drilled directly to a below groundwater source and the water extracted for use as well as a connection to a water main?
Natural wells that form directly to a below groundwater source, The water extracted for use if the connection to a water main is difficult?
Man made wells that are drilled directly to a below groundwater source and the water pumped directly to a water main?
When did the current UK Water Regulations come into force?
1991
1999
1994
1984
What does the term 'potable' mean?
Unhealthy
Dirty
Drinkable
Hot
How many UK fluid categories are there?
4
3
5
2
If water contains animal waste, butchery and human faecal matter, which UK fluid category does this water come under?
2
4
5
3
What is the difference between fluid category 4 and Fluid category 5?
Fluid category 4 has less effluent than fluid category 5
Exposure to fluid category 4 water may take weeks or months to cause harm, whereas exposure to fluid category 5 water may take hours or days to cause harm?
Fluid category 5 has more germs in it
Fluid category 4 is fresh water, whereas fluid category 5 has its colour or taste changed due to contact with a substance or due to temperature.
What are the two types of water supply in the UK
Water supplied by a water authority, known as a water undertaker, under Section 67 of the Water Act.
Water supplied from a private source, such as a borehole, river or stream.
Water supplied by a bottled spring water manufacturer, under Section 67 of the Water Act.
Water supplied from a private source, such as a borehole, river or stream.
Rain water and sea water
River water and reservoirs
Under the provisions of the Water Act 2003, the UK Government introduced two documents that regulate how plumbers install, commission and maintain water supplies within domestic buildings. They are?
The Water Act 2016 and BS 6700
The Water Act 1945 and the Model Water Byelaws 1986
The Water Supply(Water Fittings) Regulations 1999 and the Private Water Supplies Regulations 2016
The Water Supply(Water Fittings) Regulations 1919 and the Private Water Supplies Regulations 1916
How many litres of water does the average person in the UK use each day?
120 litres
130 litres
80 litres
150 litres
List the three types of ‘unwholesome water’?
grey water, rain water and black water
green water, grey water and rain water
stored water, hot water, cold water
well water, river water, rain water
Which two can we use to help us reduce our freshwater usage?
Black water and rain water
Grey water and black water
River water and pond water
Grey water and rain water
In rainwater harvesting, how much water can be captured to keep rainwater storage cistern in use for a whole year in a typical four-bedroom house?
3000 litres
2400 litres
5000 litres
10,000 litres
How much as a percentage can domestic water consumption be reduced by over the course of one year by installing a rainwater harvesting system?
75%
25%
48%
50%
Before water can be considered clean and fit to drink, which processes must it go through?
filtration, aeration, settlement, purification
sedimentation, filtration, sterilisation, aeration
sedimentation, filtration, purification, aeration
sedimentation, filtration, percolation, aeration
What is meant by the term ‘turbidity’?
dirty water
rain water
black water
cloudiness or haziness
Sedimentation tanks are usually rectangular in shape with a length to width ratio of?
Square 3:1
Circular 5:1
Rectangular 2:1
Triangular 2:1
How long should it be before cleaning of sedimentation tanks takes place?
Every 6 months
Every 12 months
Every 12 months or when their performance begins to deteriorate
Quarterly
What does the filtration process remove from the untreated water?
turbidity and algae
turbidity and floc
floc and algae
turbidity and organic matter
What are the three main types of filtration?
Slow sand filters
Rapid sand filters
Pressure filters
All of the above
What is the 'schmutzedecke' ?
A layer of sand and algae
A film of floating floc
A biological layer of sludge
A layer of faecal matter
Rapid sand filtration is used to mainly remove what from the untreated water?
Floc from coagulated water
Algae from coagulated water
The schmutzdecke layer
The amoeba
How deep is the silica sand layer in a rapid sand filter?
0.6 - 1.0 m depth
0.5 - 1.5 m depth
1.0 - 1.5 m depth
750mm - 1350mm
In a rapid sand filter when should the accumulated solids be removed?
Manually every 24 hrs or automatically when the head loss reaches a predetermined level.
Manually every 12 hrs or automatically when the head loss reaches a predetermined level.
Manually every 36 hrs or automatically when the head loss reaches a predetermined level.
Manually every 48 hrs or automatically when the head loss reaches a predetermined level.
In a rapid sand filter, how are the accumulated solids removed?
By flushing with chlorine
By backflushing with water
By backflushing with ammonia
By staring the solids through a wire mesh
What is meant by the term ‘floc’?
A collection of paper and sticks
A collection of loosely bound particles or materials, bound together by the coagulation process
Loose matter floating on the water surface
Loose matter laying on the sand layer
Small pressure filters are capable of filtering how many cubic metres of water in one hour?
10 m3/h
20 m3/h
15 m3/h
5 m3/h
What two types of material can pressure filters be manufactured from?
Concrete and steel
Aluminsed steel and copper
Cast iron and zinc
Stainless steel and glass reinforced plastic
After passing through the filtration process, how is the water sterilised?
Treated with chlorine and ammonia
Treated with chlorine and potassium sulphide
Treated with ammonia and sulphuric acid
Treated with chlorine and ammonia
What does passing water through UV light achieve?
It destroys the majority of bacteria and viruses that are present in the water
It destroys the minority of bacteria and viruses that are present in the water
It destroys the bacteria but doesn't harm the viruses
It destroyes the viruses but doesn't harm the bacteria
Why is the aeration process used to treat ground water?
To remove floc and algae
To remove bacteria and viruses
To remove dissolved metals and gases like CO2 through chemical reactions and physical mixing
To remove the hair and soap scum and other organic matter
What are the two methods of water distribution in the UK?
gravity and pumped
mains fed and tank fed
filtered and sterilised
mdpe or cast iron
Roughly how many reservoirs are there in the UK?
1500
2000
3000
4000
Which UK Government agency is responsible for these reservoirs?
OFWAT
OFGEN
OFCOM
Environment Agency
What sources of information should be used when undertaking work on water systems in the UK?
statutory regulation
industry standards
manufacturer' instructions
all of the above
Which is the statutory regulation in the UK for Water Supplies?
The Water Supply (Water Fittings) Regulations 1999 and the Private Water Supplies Regulations 2016
The Water Supply (Water Fittings) Regulations 1991 and the Private Water Supplies Regulations 1916
The Model Water Byelaws 1986 and the Private Water Supplies Regulations 2016
The Water Act 2003 and the Private Water Supplies Regulations 2016
Before 1999, which regulations covered the UK water supply?
The Water Industry Act 1991
The Water Act 2003
The Water Act 1945
The 101 Model Water Byelaws 1986
1. Which British Standard is linked to the UK Water Regulations?
BS EN 805
BS EN 806 Parts 1-5
BS 1212
BS 1010
Which other British Standard is linked to BS EN 806 Parts 1-5?
BS 8558
BS 6700
BS 8000
BS EN 430
The Water Supply (Water Fittings) Regulations 1999 were made under which Section of the Water Industry Act 1991?
Section 36
Section 72
Section 74
Section 10
The Water Regulations main aim is to prevent the following five items from happening? These are?
Contamination of water and the wastage of water
Misuse of water and the undue consumption of water
The erroneous metering of water
All of the above
Does the Water Supply(Water Fittings)Regulations 1999 cover water from a private supply?
No
Yes
Which UK regulation covers water from private wells, springs, streams, lakes etc?
The Water Supply (Water Fittings) Regulations 1999
Water Act 2003
Water Industry Act 1991
The Private Water Supplies Act 2016
Under the UK Water Act 2003, who is responsible for the inspection and testing of private water supplies?
The local authority in the area where the private supply is located.
The Environment Agency
DEFRA
OFWAT
These inspections and tests are made in accordance with which regulation?
UK Water Act 2003
The Water Supply (Water Fittings) Regulations 1999
The Private Water Supplies Regulations 2016
Water Industry Act 1991
Which regulation states that a risk assessment be carried out on all private water supplies including the source, storage tanks, any treatment system and the premises using the water supply?
The Water Supply (Water Fittings) Regulations 1999
Water Industry Act 1991
UK Water Act 2003
The Private Water Supplies Regulations 2016
What is the main British Standard for design, installation, commissioning, testing, flushing and disinfection of systems in the UK?
BS EN 806 Parts 1-5
BS 6700
BS 1212
BS EN 805
Which British Standard has this mainly replaced?
BS 8000
BS 512
BS 6700
BS 1010
Which Building Regulation references cold water services and systems?
Approved Document G1- Cold Water Supply and Approved Document G2 - Water Efficiency
Building Regulation Part L1 a
Building Regulation G3
Building Regulation Part A
Which document must we reference when installing appliances and equipment to a cold-water system?
Manufacturer' instructions
Building Regulations
British Standards
All of the above
