Unit 331 / 15 Commission cold water systems and components

Multiple Choice

Which of the following is a potential consequence of inadequate commissioning and maintenance of cold water systems?

• Blue-water corrosion

• Increased water pressure

• Reduced pipe diameter

• Lower water temperature

Multiple Select

Which documents must be consulted to ensure correct commissioning procedures for cold water systems?

• Water Supply (Water Fittings) Regulations 1999

• British Standard BS 6700 and BS EN 806

• Building Regulations Approved Document G1 and G2

• Manufacturer’s instructions of equipment and appliances

Multiple Choice

During a visual inspection of a boosted cold water system, which of the following should be checked to ensure installation meets industry standards?

• That all open ends are capped off and all valves are isolated

• That the water temperature is above 60°C

• That the system is painted blue

• That the system is connected to the gas supply

Fill in the Blanks

A pressure booster pump installation that draws more than

litres per minute from the supply pipe must be notified to the water undertaker.

Multiple Choice

In the diagram of a pressure booster pump system, what is the purpose of the protected break cistern?

• To separate the booster pump from the incoming supply pipe

• To increase the water temperature

• To filter the water

• To reduce noise in the system

Multiple Choice

What is the main reason for filling a plumbing system in stages during the initial fill?

• To check for leaks at each stage

• To save water

• To speed up the process

• To reduce water pressure

Multiple Select

Which of the following are recommended practices to avoid airlocks during the filling of cistern-fed supplies?

• Filling each stage slowly and methodically

• Allowing cisterns to fill to capacity before opening gate valves

• Trickle filling the system

• Opening all valves at once

Fill in the Blanks

Before soundness testing a cold water system, a thorough visual inspection should include checking that all open ends are

off and all valves are isolated.

Multiple Choice

What is the main safety precaution that should be taken before conducting a pressure (soundness) test on a plumbing system?

• Carry out a risk assessment and use PPE

• Open all valves

• Increase water pressure rapidly

• Bypass the safety valves

Multiple Choice

Which of the following should be checked before starting a soundness test on a plumbing system?

• Availability of operatives

• Type of pipe material

• Water temperature

• Presence of insulation

Multiple Choice

According to the UK Water Regulations, what is the minimum internal water pressure a system should withstand during a soundness test?

• Equal to the maximum operating pressure

• 1.5 times the maximum operating pressure

• Twice the maximum operating pressure

• 1.5 times the maximum pressure to which the installation is subjected in operation

Multiple Choice

After testing a system containing no plastic, what important step should be taken?

• Flush the system

• Keep a careful record of the test carried out

• Replace all valves

• Increase the water pressure

Fill in the Blanks

Regulation 12 states that the test for non-elastomeric pipes should continue for one hour without further

and without any visible leakage or pressure loss.

Multiple Select

Which of the following are steps involved in Test type A for soundness testing?

• Raise pressure to 1 bar and check for leaks

• Increase pressure to 1.5 times normal operating pressure

• Release pressure to 1/3 of previous pressure

• Maintain pressure for 2 hours

Multiple Choice

Which of the following is NOT a circumstance that requires the disinfection of water piping systems according to the British Standard?

• In new installations (except private dwellings occupied by a single family)

• Where large extensions or alterations to systems have been undertaken

• Where the system has been regularly flushed and maintained

• Where underground pipework has been installed

Multiple Choice

Which of the following issues can result from poor installation techniques in plumbing systems?

• Noise

• Undue warming of cold water systems

• Leakage

• All of the above

Fill in the Blanks

Commissioning records for large cold water systems should include the

, time, and the name(s) of the commissioning engineer(s).

Multiple Select

Select all the types of information that should be included in a commissioning record for large cold water systems.

• The type of pressure test carried out and its duration

• The disinfection chemicals used and the disinfection readings

• The color of the pipes used

• The accumulator pressure

Multiple Choice

Which of the following is NOT one of the objectives of this session on cold water system planning and design?

• Carry out visual inspections

• Install heating systems

• Conduct soundness tests

• Complete commissioning records

Multiple Choice

Why is it important to commission cold water systems and components in plumbing installations?

• To ensure the system operates efficiently and safely

• To increase the cost of installation

• To reduce the lifespan of the system

• To avoid using any safety checks