WorksheetsMTL2 Cold Water Mock Test
Total questions: 40
Worksheet time: 20mins
Which of the following types of water source is most likely to be used for the provision of a private water supply?
River
Reservoir
Bore-hole
Mains water supply
Harvested rainwater should not be used for:
Washing clothes
Watering the garden
Flushing toilets
Drinking
What the minimum and maximum depth of cover for a cold water supply pipe?
450mm-1350mm
600mm-1100mm
750mm-1350mm
900mm-1100mm
What size of pipe is normally used to feed an indirect cold water system from the cold water storage cistern?
15mm
22mm
28mm
35mm
What type of backflow into the cold mains supply is caused by the expansion of water?
Back siphonage
Reverse pressure
Back pressure
Reverse flow
The backflow prevention method used for the appliance in the picture is a:
Double check valve
Air gap
Non-return valve
Break tank
What is the name of component with the empty arrow of this BS1212 part 2 float operated valve?
Water inlet
Lever arm
Water outlet
Diaphragm
If a direct cold supply water system is to be used, what must the property have?
Cold water storage cistern
High level service valve
An adequate incoming supply pressure
Overflow pipe
Which of the following should be used where cold water pipes pass through a wall?
Pipe sleeve
Insulation
Wall plug
Grommet
What hand tool is shown in the picture?
Pipe wrench
Adjustable spanner
Pump pliers
Water pump
What is the name of this measuring device?
Flow gauge
Pressure gauge
Weir gauge
Level gauge
On a cold water storage cistern, where should the outlet be positioned?
From the base of the cistern
From the top
From the side
From the overflow
What must be used to reinforce the fitting of a float operated valve on a plastic storage cistern?
Back plate
Support bracket
Washer
Gasket
In which of the following types of structure is it possible to embed cold water pipes in chases?
Internal wall
Timber floor
External wall
Roof space
Which of the following must be installed on the cold water supply pipe to a WC cistern?
Stopcock
Drain valve
Service valve
Check valve
It is necessary to insulate a cold water storage cistern installed in a heated space to prevent:
Freezing
Heat absorption
Condensation
Pressure loss
What documentation would contain maintenance information for a water softener?
Installation certificate
User guide
Manufacturer’s servicing instructions
Building regulations
What steps should be taken to check the operation of a double check valve on a cold water supply system as part of a periodic maintenance inspection?
Test the inlet pressure
Remove and clean the valve
Replace both check valves
All of the above
During a routine inspection a plastic cold water storage cistern is found to be supported on two ceiling joists. What remedial action is needed?
Add insulation
Fully support the cistern base
Fit a larger overflow
Replace the cistern
Which of the following items of information is required on a maintenance record for terminal fittings on cold water systems?
Date installed
Maintenance activities carried out
Manufacturer’s name
Installer’s name
A working method which can help to save time during work to renew cold water systems pipework and draw-off fittings is:
Pre-fabrication
Insulation
Prefilling
Commissioning
Which document should be given to the plumber to enable them to identify what part of a cold water system is to be decommissioned?
Work instruction
Risk assessment
Specification
Permit to work
Which two components are used to temporarily decommission sections of cold water installations?
Isolation and stop valves
Stop and drain valves
Service and drain valves
Gate and check valves
Which of the following actions must be undertaken first when permanently decommissioning cold water supply pipework?
Drain the system
Isolate the incoming supply
Remove terminal fittings
Label the system
Prior to filling a cold water system with water for testing, checks should be made to ensure that:
All valves are closed
Pipework is adequately supported
The cistern is filled
The test gauge is fitted
Which of the following steps must be taken prior to the initial filling of a cold water system for the purpose of leak testing?
Carry out a visual inspection of the system
Flush the pipework
Fill the cistern
Open all valves
Which type of pipe material should be tested for soundness at 1.5 times the normal operating pressure without loss of pressure?
Plastic
Flexible
Rigid
Composite
Cold water systems must be flushed with cold water following the completion of:
New installations
Repairs
Alterations
All work activities
What action should be taken when pipework support bracketing is defective?
Tighten the screws
Replace the damaged brackets
Add insulation
Reposition supports
The cover of a cold water storage cistern must provide adequate protection against:
Heat and light
Dust and air
Light and insects
Water vapour
What is the component shown ?
Non-return valve
Double check valve
Backflow preventer
Service valve
What component(s) makes connecting water supply pipes to pedestal wash basins easier?
Copper tails
Flexible hoses
Plastic pipe
Compression joints
A BS1212 type 2 float operated valve in a cold water storage cistern is causing the warning pipe to continually overflow. Which of the following remedial work tasks is required?
Replace the diaphragm
Replace the float
Adjust the lever
Fit a new washer
If the water mixes in the body of a mixer tap, what must be provided to protect the cold supply from risk of backflow?
Break tank
Air gap
Double check valve
Non-return valve
Which water treatment process involves adding a chemical coagulant to bind particles together and remove colour, turbidity, and algae?
Sedimentation
Filtration
Flocculation
Chlorination
What is the clipping distance for 22mm copper pipe?
1.2m Horizontal
1.8m Vertical
1.2m Horizontal
2.4m Vertical
1.8m Horizontal
2.4m Vertical
0.8m Horizontal
1.2m Vertical
What is the clipping distance for 15mm copper pipe?
1.2m Horizontal
1.8m Vertical
1.8m Horizontal
2.4m Vertical
1.2m Horizontal
2.4m Vertical
0.8m Horizontal
1.2m Vertical
What is the maximum depth allowed for a notch in a joist that is 200mm deep?
25mm
37.5mm
75mm
12.5mm
According to Building Regulations Part A, what is the maximum depth a joist can be notched to?
1/4
1/6
1/8
2/8
According to Building Regulations Part A, To work out the maximum diameter of a hole you can drill in the joist you divide the depth of the joist by what measurement ?
1/4
1/6
1/8
2/8
