Worksheets6035 Cold Water Revision
Total questions: 47
Worksheet time: 24mins
What does WRAS stand for in water regulations?
Water Regulations Advisory Scheme
Water Resource Allocation System
Water Regulation Assessment Service
Water Recycling and Sanitation
Which of the following is a legal requirement for water fittings?
WRAS approval
Corrosion
Contamination
None of the above
What are the stages of the Rainwater Cycle?
Evaporation, Condensation, Precipitation
Photosynthesis, Respiration, Transpiration
Melting, Freezing, Sublimation
Erosion, Deposition, Compaction
Which of the following is an above ground water source?
Wells
Bore Holes
Lakes
Natural springs
Fill in the blank: Mains Water Pipe known as MDPE (Medium Density Polyethylene) is _____
Blue
Red
Green
Yellow
When installing a cold water system, which two factors must be considered?
Pressure and Flow rates at peak times
Temperature and humidity
Pipe color and insulation type
Water taste and odor
Direct System: All cold outlets will be fed from the mains, all points will be _____
drinkable
non-potable
filtered
recycled
Indirect System: All outlets (except Kitchen Tap) will be fed from the CWSC (Cold Water Storage System) in the _____
loft
basement
garage
garden
Fluid Category 1 is defined as:
Wholesome water supplied by the water Undertaker
Non-potable water from industrial sources
Contaminated water containing chemicals
Saltwater from natural sources
Fluid Category 3 has a slight health risk and should ____ be drunk.
not
always
sometimes
frequently
Which Fluid Category is most likely fatal?
Fluid Category 1
Fluid Category 3
Fluid Category 5
Fluid Category 2
Which instrument is used to measure pressure in a cold water system?
Pressure gauge
Thermometer
Flow meter
Hydrometer
Which instrument is used to measure flow rate in a cold water system?
Flow/Weir Cup (Lts/s or Lts/m)
Thermometer
Pressure Gauge
pH Meter
What is a Sure Stop valve?
A diaphragm valve closing under water pressure
A valve used to increase water pressure
A valve that controls gas flow
A manual shut-off valve for electricity
Fullway Gate Valve is used on which type of pressure?
Low Pressure (Gravity)
High Pressure (Hydraulic)
Medium Pressure (Pneumatic)
Vacuum Pressure
If a Fullway Gate Valve becomes defective, what must you do?
Replace complete valve
Repair only the handle
Lubricate the valve
Tighten the bolts
Stop Valve is used on mains pressure (high Pressure) and can be maintained and parts can be replaced if it becomes defective.
True
False
Which valve should be installed before any appliance such as toilets, basin taps, boilers, CWSC?
Isolation/Service Valve
Pressure Reducing Valve
Check Valve
Gate Valve
Drain Off valve is fitted at all ______ points throughout the system to enable emptying the system fully.
low
high
middle
side
Which type of float operated valve is no longer used due to risk of back flow?
Portsmouth Valve
Ball Valve
Gate Valve
Butterfly Valve
Which float operated valve uses a brass diaphragm washer and is suitable for CWSC and Toilet Cistern?
Part 2 – Brass, Diaphragm washer, Top outlet
Part 1 – Plastic, Rubber washer, Side outlet
Part 2 – Plastic, Diaphragm washer, Bottom outlet
Part 1 – Brass, Rubber washer, Top outlet
Plastic, Diaphragm float operated valve can be side or bottom entry, top outlet, but is not suitable in CWSC as it could become brittle.
True
False
What is the function of the Pillar Tap?
It has a rubber washer that closes against the seat.
It is used to measure water pressure.
It is designed to filter impurities from water.
It is used to mix hot and cold water.
When do the discs in a Ceramic Disc Tap open the tap?
When the 2 discs align
When the discs are completely apart
When the discs are perpendicular
When the discs are misaligned
Which items are included in the Byelaw 30 Kit?
Screened vent, Tank Lid, Tank Insulating Jacket, Overflow/warning pipe, Dip Pipe, Screen for overflow, FOV Part 2, Tank connector
Screened vent, Tank Lid, Tank Insulating Jacket, Overflow/warning pipe, Dip Pipe, Screen for overflow, FOV Part 1, Tank connector
Screened vent, Tank Lid, Tank Insulating Jacket, Overflow/warning pipe, Dip Pipe, Screen for overflow, FOV Part 2, Tank insulator
Screened vent, Tank Lid, Tank Insulating Jacket, Overflow/warning pipe, Dip Pipe, Screen for overflow, FOV Part 2, Tank cover
CWSC should be situated on ______ and the boarded should be 150mm all the way round the base of the tank. It should have 350mm minimum above for maintenance access.
Plywood
Concrete
Steel
Plastic
What type of tap has a rising spindle and non rising spindle with a washer and jumper plate, and is used for Bath, Basin and Bidet?
Pillar Taps
Mixer Taps
Ball Valve Taps
Bib Taps
Which tap is a taller version of a normal Pillar Tap and is used on Kitchen Sinks?
High Neck Pillar Tap
Bib Tap
Angle Valve
Concealed Stop Cock
Which tap contains discs with holes that align to allow water through when turned a quarter, and shuts off water when turned back?
Quarter turn Ceramic Disc Tap
Compression Washer Tap
Ball Valve Tap
Monobloc Mixer Tap
Which type of tap mixes hot and cold water within the body and must have backflow prevention?
Mixer Taps
Pillar Taps
Bib Taps
Ball Valve Taps
Which tap does not mix water in the tap?
Bi flow mixer
Single lever mixer
Wall mixer
Pillar cock
Which tap is wall mounted and mainly used for outside taps or butler sinks?
Bib Tap
Pillar Tap
Mixer Tap
Monobloc Tap
What is the term for when water travels in the opposite direction to which it was designed to travel?
Backflow
Overflow
Evaporation
Condensation
What is the term for when water is drawn backwards via negative pressure (suction)?
Back Siphonage
Reverse Osmosis
Capillary Action
Hydraulic Lift
Which valve is used to protect Fluid Cat. 1 from Fluid Cat. 2 and is used in mixer taps where hot and cold water mix in the body of the tap?
Single Check Valve
Double Check Valve
Pressure Reducing Valve
Ball Valve
Which valve is used to protect Fluid Cat. 1 from Fluid Cat. 3 and is used in outside taps or filling loops on heating systems?
Double Check Valve
Pressure Reducing Valve
Ball Valve
Gate Valve
Which valve is used to protect Fluid Cat. 1 from Fluid Cat. 4, such as in swimming pools?
RPZ Valve Reduced Pressure Zone Valve
Ball Valve
Gate Valve
Check Valve
What does AG stand for in the context of air gaps for protection of Fluid Cat. 1 from Fluid Cat. 2?
Height between FOV and Overflow/Warning Pipe (25mm)
Air Gauge
Automatic Gate
Above Ground
What does AUK 1 refer to in air gaps for protection of Fluid Cat. 1 from Fluid Cat. 2?
Height between the WC pan spill over and WC cistern spill over (300mm)
Distance between the tap outlet and the basin rim (150mm)
Gap between the shower head and the floor drain (200mm)
Space between the storage tank overflow and the tank inlet (250mm)
What does AUK 2 refer to in air gaps for protection of Fluid Cat. 1 from Fluid Cat. 2?
Bath, Basin or over the rim Bidet outlet of tap to the spill over of each appliance
Direct connection of tap to the main water supply
Use of double check valve for all appliances
Installation of a pressure reducing valve
What does AUK 3 refer to in air gaps for protection of Fluid Cat. 1 from Fluid Cat. 2?
Kitchen Sink (Food prep so more risk of contamination so Gap needs to be higher)
Bathroom Sink (Low risk, standard gap)
Outdoor Tap (No air gap required)
Dishwasher (Mechanical backflow prevention only)
What is temporary decommissioning? Fill in the blank: Temporary decommissioning is when a system is isolated for a period of time while work is carried out, after which the system is put back into ________ operation.
normal
manual
limited
emergency
What is permanent decommissioning? Fill in the blank: Permanent decommissioning is when a system or appliance is taken out of use, isolated at the incoming mains stop valve and then ________.
drained
repaired
painted
restarted
What is a dead leg in pipework? Fill in the blank: A dead leg is a section of pipework through which water cannot be ________ off or flow.
drawn
heated
measured
filtered
What is a passive dead leg? Fill in the blank: A passive dead leg is a section of pipework through which water cannot be drawn off or flow. Pipe not being cut back to a branch end or a drop with no DOV can give rise to ________ growth.
bacterial
fungal
algal
mineral
When testing rigid pipework (Copper or LCS), what is the correct procedure? Choose the correct sequence:
Fill the system with water, allow 30 mins for temperature stabilisation, then raise pressure 1½ times the working pressure and leave for 1 hour.
Fill the system with water, allow 15 mins for temperature stabilisation, then raise pressure 2 times the working pressure and leave for 1 hour.
Fill the system with water, allow 30 mins for temperature stabilisation, then raise pressure 1½ times the working pressure and leave for 2 hours.
When testing plastic pipework, what is the correct procedure? Choose the correct sequence:
Fill the system and raise to 1 bar for 45 mins, then raise pressure 1½ times the working pressure and leave for 15 mins. Then reduce pressure to 1/3 and test for a further 45 mins.
Fill the system and raise to 2 bar for 30 mins, then raise pressure 1½ times the working pressure and leave for 30 mins. Then reduce pressure to 1/2 and test for a further 30 mins.
Fill the system and raise to 1 bar for 45 mins, then raise pressure 2 times the working pressure and leave for 15 mins. Then reduce pressure to 1/3 and test for a further 45 mins.
