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Cold water mock exam

Total questions: 73

Worksheet time: 37mins

Name
Class
Date
1.

State which regulation set legal requirements for the design, installation, operation and maintenance of plumbing systems, water fittings and water-using appliances, with the specific purpose to prevent misuse, waste, undue consumption or erroneous measurement of water and, most importantly, to prevent contamination of drinking water.

a)

Water Supply (Water Fittings) Regulations 1999

b)

Building Regulations Part G: Sanitation, hot water safety and water efficiency

c)

BS 8558: Guide to the design, installation, testing and maintenance of services supplying water for domestic use

d)

WRAS Materials Guidance 2019

2.

Identify which British standard is the Specification for installations inside buildings conveying water for human consumption.

a)

12056

b)

1010

c)

8000

d)

BS EN 806

3.

Identify which British standard is the Guide to the design, installation, testing and maintenance of services supplying water for domestic use within buildings and their curtilages.

a)

806

b)

1212

c)

6700

d)

8558

4.

State which organisation produces the water regulations and the water fittings and material directory.

a)

Water Regulations Advisory Scheme (WRAS)

b)

Chartered Institute of Plumbing and Heating Engineering (CIPHE)

c)

British Standards Institution (BSI)

d)

Health and Safety Executive (HSE)

5.

Identify what the abbreviation WRAS stands for.

a)

Water requirement and standards

b)

Water regulation advice scheme

c)

Water regulation advisory scheme

6.

Identify the type of well indicated by the arrow in the upper diagram.

a)

Shallow well

b)

Deep well

c)

Artesian well

d)

Land spring

7.

Identify which of the above wells is not wholesome water.

a)

Shallow well

b)

Deep well

c)

Artesian well

d)

Confined aquifer well

8.

Indicate on the pH scale which value represents neutral water.

a)

6

b)

7

c)

8

d)

9

9.

Identify which chemical is in permanent hard water.

a)

Calcium sulphate

b)

Calcium bicarbonate

c)

Sodium chloride

d)

Potassium nitrate

10.

Identify which chemical is in temporary hard water.

a)

Calcium bicarbonate

b)

Calcium sulphate

c)

Magnesium chloride

d)

Sodium carbonate

11.

State the problem with temporary hard water when heated above 65 degrees.

a)

Formation of scale due to precipitation of calcium carbonate

b)

Corrosion of copper pipes due to acidic attack

c)

Increase in water alkalinity causing taste issues

d)

Reduction in dissolved oxygen leading to odor

12.

Describe the easiest way to determine if you have hard or soft water.

a)

Perform a soap lather test and observe ease of forming suds

b)

Measure electrical conductivity with a meter

c)

Evaluate water taste differences

d)

Inspect water color in a clear glass

13.

Identify the system shown: a water treatment plant feeds a network of water mains that supply houses and other buildings through branch services.

a)

Municipal potable water distribution network

b)

Rainwater harvesting and storage system

c)

Sanitary sewer collection network

d)

Fire sprinkler piping layout

14.

Identify the fitting shown and state where it is used: a chain-mounted tool clamped to a live main with a crank and blue handle.

a)

Under-pressure (hot) tapping machine used to make service connections to live water mains without shutting down supply

b)

Gate valve used to isolate an individual fixture within a building

c)

Handheld pipe cutter used to cut copper tube prior to soldering

d)

Fire hydrant head used for emergency fire-fighting connections

15.

Identify the systems shown inside the houses: fixtures feed to a grey water collection and filtration, pumped to an underground storage cistern and returned to a high-level grey water storage cistern for supply.

a)

Domestic greywater recycling system with storage cistern and pump

b)

Central heating (hydronic) loop with boiler and radiators

c)

Ventilation ductwork with mechanical extract fans

d)

Rainwater downpipe and roof drainage system

16.

Identify the type of pipe shown in the trench and how you would confirm that it is carrying water.

a)

Blue MDPE potable water service pipe; confirmed by blue color coding and water-specific markings on the pipe

b)

Orange PVC electrical conduit; confirmed by cable pull strings and electrical hazard labeling

c)

Black polyethylene gas main; confirmed by yellow stripe and gas service tags

d)

Grey PVC soil pipe; confirmed by soil/waste labels and connection to sanitary fixtures

17.

State the minimum and maximum depth for a buried water service pipe.

a)

450450 mm minimum, 900900 mm maximum

b)

600600 mm minimum, 12001200 mm maximum

c)

750750 mm minimum, 13501350 mm maximum

d)

900900 mm minimum, 15001500 mm maximum

18.

Give the name of the pipe that runs from the water main to the boundary stop valve.

a)

Communication pipe

b)

Supply pipe

c)

Service pipe

d)

Distribution pipe

19.

Give the name of the pipe that runs from the boundary stop valve to the domestic property.

a)

Communication pipe

b)

Supply pipe

c)

Riser pipe

d)

Branch pipe

20.

State the minimum distance that an uninsulated service pipe must be kept from the external wall where it enters the property.

a)

2525 mm

b)

5050 mm

c)

7575 mm

d)

100100 mm

21.

Identify which type of copper tube can be used underground.

a)

R220 soft copper

b)

R250 half hard

c)

R220 soft coil micro-bore

d)

R290 hard

22.

State the first two fittings that must be installed on the service pipe as it enters the property.

a)

Internal stop valve and drain off valve

b)

Pressure reducing valve and double check valve

c)

Double check valve and water meter

d)

Gate valve and strainer

23.

State where the internal stop valve should be installed.

a)

At the highest point of the system, near the loft tank

b)

Close to the point of entry on the ground floor, readily accessible

c)

Outside the property, beside the boundary box

d)

Next to the boiler inside the plant room

24.

State the two places where the water to the service/supply pipe can be isolated.

a)

At the boundary stop tap and at the internal stop valve

b)

At the water main and at the boiler drain cock

c)

At the kitchen mixer tap and at the shower valve

d)

At the pump isolator and at the PRV gauge

25.

Identify three areas where a water meter may be located.

a)

In a boundary box at the property edge or footpath

b)

Inside near the point of entry by the internal stop valve

c)

In the loft next to the cold water storage tank

d)

In an external wall box or meter chamber

e)

Behind the kitchen plinth under the sink

26.

Identify the BS number that applies to stop valves for domestic water services.

a)

BS 1212

b)

BS 1254

c)

BS 806

d)

BS 1010

27.

State which type a drain off valve must be.

a)

Full-bore drain off valve

b)

Screw-down drain off cock

c)

Spring-loaded check valve

d)

Lever ball non-return valve

28.

State the most cost‑effective procedure to repair a stop valve when the valve jams.

a)

Replace the entire valve body and pipework

b)

Repack the gland and replace/renew the washer and jumper

c)

Install a pressure reducing valve upstream

d)

Fit a strainer to remove debris

29.

Identify where a drain off valve should be installed apart from above the stop valve.

a)

At the highest point of the system

b)

At the lowest point of the installation

c)

On every branch after each tap

d)

Inside the boiler casing

30.

When installing appliances, identify the two key tests that must be carried out.

a)

Static pressure test

b)

Flow rate (discharge) test

c)

Electrical continuity test

d)

Water hardness test

31.

Identify the equipment shown: a small calibrated cup used to measure discharge at a tap.

a)

Flow cup for measuring tap flow rate

b)

Pressure gauge for measuring static pressure

c)

Stop valve spanner

d)

Non-return valve

32.

Identify the equipment shown: a gauge and regulator assembly fitted to a cold water line.

a)

Pressure reducing valve with pressure gauge

b)

Flow cup for measuring discharge

c)

Double check valve

d)

Gate valve with sight glass

33.

Identify factors that may impact the accuracy of flow and pressure measurements.

a)

Partially closed or faulty stop valves

b)

Blocked tap aerators or strainers

c)

Long small‑bore pipe runs and bends

d)

Pressure reducing valve settings or upstream restrictions

e)

Ambient temperature variation only

34.

Using the house plumbing diagram showing a cold water storage cistern supplying bathrooms, a boiler with flow and return to a hot water cylinder, a rising main to the kitchen sink, and vent/safety pipework, select three advantages of the above system.

a)

Provides stored water for continuity during mains interruptions

b)

Reduces backflow risk to the mains by supplying most outlets from the cistern

c)

Gives high mains pressure at all taps including bath and basin

d)

Allows quieter operation because many outlets are not at mains pressure

e)

Requires fewer components because no cistern is needed

35.

Using the same diagram, select three disadvantages of the above system.

a)

Lower outlet pressures at cistern‑fed taps compared with mains

b)

Takes more space for cistern and associated vent/pipework

c)

Increased risk of stagnation or contamination if cistern hygiene is poor

d)

Provides no reserve of water during a supply failure

e)

Cannot be combined with a boiler and hot water cylinder

36.

Using the plumbing layout showing a storage cistern feeding most fixtures (WC, wash basin, bath) and a vented hot water storage vessel, select three advantages of the above system.

a)

Provides reserve water from the cistern during mains interruptions

b)

Balances pressures between hot and cold supplies for bathroom fixtures

c)

Quieter operation because many outlets are gravity‑fed

d)

High mains pressure delivered to all fixtures, including bath and basin

e)

Eliminates the need for a cistern and vent pipework

37.

Using the same diagram, select three disadvantages of the above system.

a)

Lower delivery pressures at cistern‑fed outlets

b)

Requires additional space for cistern, supports, and pipework

c)

Potential for stagnation or contamination if the cistern is not maintained

d)

No stored water is available during supply failure

e)

Hot and cold supplies cannot be balanced

38.

Describe the easiest way to determine if the system is direct or indirect.

a)

Observe whether most outlets (except the kitchen sink) are supplied from a storage cistern rather than directly from the mains; if so, it is an indirect system

b)

Measure the temperature of water leaving the boiler

c)

Count the number of fixtures connected to the system

d)

Check whether the kitchen sink is supplied by a pump

39.

Identify the reasons for using approved water fittings in cold water plumbing systems.

a)

Prevent contamination and protect public health by ensuring materials are safe for potable water

b)

Ensure compliance with water regulations and legal requirements

c)

Improve aesthetic appearance of bathrooms

d)

Reduce leakage and enhance reliability through tested performance

e)

Increase water bills

40.

Identify the fitting shown: a brass stop valve with a T-handle installed inline. Where would you typically find it?

a)

Main water supply stopcock at a property entry

b)

Under-sink appliance isolation on a flexible hose

c)

External hose connection backflow protection

d)

Drain point at a hot-water cylinder or heating circuit

41.

Identify the fitting shown: a chrome lever-operated ball valve with compression ends. Where would you typically find it?

a)

Isolation valve on appliance or fixture supply pipework

b)

Low-pressure gravity hot-water main control

c)

Double check valve on outside tap supply

d)

Pressure-reducing valve on incoming main

42.

Identify the fitting shown: a small brass angled valve body with cap. Where would you typically find it?

a)

Drain-off cock used to drain heating circuits or cylinders

b)

Main stopcock on incoming cold main

c)

Double check valve for hose bib

d)

Automatic leak-detection shut-off valve

43.

Identify the fitting shown: a small chrome inline valve with a screwdriver slot on the body. Where would you typically find it?

a)

Service isolation valve under a basin, toilet, or appliance

b)

Gate valve on low-pressure systems

c)

Double check valve serving an outside tap

d)

Automatic electric shut-off valve on main

44.

Identify the fitting shown: a chrome inline body with a central bulge. Where would you typically find it?

a)

Double check valve on an external hose tap or appliance connection

b)

Service isolation valve under a sink

c)

Gate valve on gravity hot-water

d)

Drain-off cock at the base of a cylinder

45.

Identify the fitting shown: a brass gate valve with a red handwheel. Where would you typically find it?

a)

On low-pressure gravity-fed hot-water or heating circuits

b)

As a double check valve for hose outlets

c)

As an automatic leak-detection shut-off device

d)

As an under-sink service isolation valve

46.

Identify the fitting shown: a white wall module with a wired actuator connected to an inline valve on copper pipe. Where would you typically find it?

a)

Automatic leak-detection shut-off on the incoming main

b)

Manual stopcock at property boundary

c)

Outside hose bib backflow preventer

d)

Drain-off cock for heating circuits

47.

Which of the above fittings is used on low pressure systems?

a)

Gate valve with red handwheel

b)

Lever-operated ball valve

c)

Service isolation valve (screwdriver slot)

d)

Double check valve

48.

In the stop valve cross-section shown, which component seals against the seat to stop the flow?

a)

Washer (jumper)

b)

Olive

c)

Compression nut

d)

Spindle thread

49.

In the stop valve cross-section shown, what is the stationary surface the washer seals against?

a)

Valve seat

b)

Gland packing

c)

Compression fitting

d)

Handle

50.

In the stop valve cross-section shown, which part the handle turns to raise and lower the washer?

a)

Spindle

b)

Olive

c)

Body casting

d)

Drain port

51.

In the stop valve cross-section shown, which component prevents leakage around the spindle?

a)

Gland packing

b)

Washer (jumper)

c)

Seat

d)

Compression nut

52.

In the compression fitting diagram, what is the name of the soft metal ring compressed to make the seal?

a)

Olive

b)

Ferrule nut

c)

Washer

d)

Seat

53.

Identify the tap type shown: pair of individual chrome pillar taps for hot and cold at a basin.

a)

Pillar taps

b)

Bib taps

c)

Outside hose bibcock

d)

Single-lever mixer tap

54.

Identify the tap type shown: wall-mounted chrome taps with star handles, one marked blue and one red.

a)

Bib taps

b)

Pillar taps

c)

Single-lever mixer tap

d)

Outside hose bibcock

55.

Identify the tap type shown: a brass outdoor tap with hose connector and T-handle.

a)

Outside hose bibcock

b)

Pillar taps

c)

Single-lever mixer tap

d)

Bib taps (indoor)

56.

Identify the tap type shown: a single chrome body with one lever controlling mixed flow.

a)

Single-lever mixer tap

b)

Pillar taps

c)

Bib taps

d)

Outside hose bibcock

57.

Label the following diagrams for the cold water storage cistern float-operated inlet valve. Which valve type is illustrated in both diagrams?

a)

Float-operated (ballcock) valve

b)

Gate valve

c)

Non-return (check) valve

d)

Pressure-reducing valve

58.

State the main considerations when installing a cold water cistern to section 2 schedule 7 paragraph 16, based on the diagram. Select all that apply.

a)

Provide a screened vent with a neoprene sealing grommet around the vent pipe

b)

Fit a service valve on the cold feed to allow isolation

c)

Ensure a screened overflow/warning pipe that discharges below the water level

d)

Position the preferred cold distribution pipe connection low on the cistern to promote circulation

e)

Omit the float-valve connection to reduce turbulence

59.

Label the diagram below. Item A on the plastic cold water cistern most likely indicates which feature?

a)

Screened overflow/warning outlet on the cistern wall

b)

Removable access lid/cover

c)

Vent boss for the vent pipe

d)

Cold feed outlet at the base

60.

Label the diagram below. Item B on the plastic cold water cistern most likely indicates which feature?

a)

Service valve location

b)

Cold feed outlet spigot

c)

Mounting lug or bracket on the cistern body

d)

Float valve connection boss

61.

Label the diagram below. Item C on the plastic cold water cistern most likely indicates which feature?

a)

Removable access lid/cover

b)

Vent boss for the screened vent pipe

c)

Overflow outlet

d)

Cold distribution pipe connection

62.

Label the diagram below. Item D on the plastic cold water cistern most likely indicates which feature?

a)

Removable access lid/cover secured with screws

b)

Float valve connection boss

c)

Drain plug

d)

Warning pipe clip position

63.

State the requirements for a 1000 L1000\,\mathrm{L} cold water cistern. Select all that apply.

a)

Close-fitting insulated lid with access hatch

b)

Screened vent and screened overflow/warning pipe

c)

Rigid, level support base capable of carrying the full tank weight when full

d)

Service valve on the cold feed and accessible isolation for maintenance

e)

Use of solvent-based jointing compounds on plastic connections

64.

Identify the tool used for drilling holes into the cold water cistern.

a)

Hole saw with arbor

b)

Wood chisel

c)

Cold chisel and hammer

d)

Twist drill without pilot

65.

State which jointing material shouldn’t be used with plastic cold water cisterns.

a)

PTFE tape

b)

Rubber gasket

c)

Solvent-based jointing compound (petroleum/oil-based paste)

d)

Silicone sealant rated for potable water

66.

Identify in the diagram where you would install the distribution pipe to prevent stagnation.

a)

High-level connection near the float valve

b)

Mid-level connection just below the normal water line

c)

Low-level connection at the base of the cistern, opposite the inlet

d)

External bypass pipework

67.

Identify the types of FOV below.

a)

Portsmouth (piston type)

b)

Equilibrium diaphragm type

c)

Bottom-entry piston type

d)

Top-entry diaphragm type

68.

Identify the type of FOV shown.

a)

Equilibrium diaphragm type

b)

Portsmouth (piston type)

c)

Bottom-entry piston type

d)

Top-entry ball valve type

69.

Describe the key contamination issues in plumbing systems. Select all that apply.

a)

Backflow allowing contaminated water to enter wholesome supply

b)

Cross-connections between potable and non‑potable circuits

c)

Stagnation leading to microbial growth in stored or rarely used sections

d)

Excessive water pressure causing noise and wear

70.

Select the protective device you would install to protect category 1 water from category 2 fluids (e.g., hot water in a cylinder, discharge from a combi tap, softened water).

a)

Single check valve on the supply

b)

Double check valve on the supply

c)

Reduced pressure zone (RPZ) backflow preventer

d)

Type AG air gap above the receiving vessel

71.

Select the protective device you would install to protect category 1 water from category 3 fluids (e.g., primary bath or shower water).

a)

Single check valve on the supply

b)

Double check valve on the supply

c)

Reduced pressure zone (RPZ) backflow preventer

d)

Type AG air gap above the receiving vessel

72.

Identify which of the above taps would not require single check valves, and explain why.

a)

Twin‑flow mixer tap, because hot and cold remain separated within the spout until discharge

b)

Bi‑flow mixer tap, because hot and cold mix within the body before discharge

c)

Both taps, because neither allows mixing before discharge

d)

Neither tap, because both mix streams before reaching the outlet

73.

AUK3: This air gap is the distance between the outlet of a tap and the spillover level on a sink. Identify on which appliance this should be fitted to provide the air gap.

a)

Bath

b)

Wash basin

c)

Kitchen sink

d)

Bidet