cold water 1

A commissioning report would include which of the following?

• Invoice, address and final comments

• Chlorination figures, discharge rates and duration of test pressures

• Service plan, comments on job, manufacturer’s instructions

• Duration of job, list of test techniques, extra costs incurred

Answer explanation

A commissioning report focuses on operational data, making 'Chlorination figures, discharge rates and duration of test pressures' the correct choice, as it details system performance and compliance.

The building control officer should be notified at which stage of a job?

• After

• The beginning

• During

• Before it begins

Answer explanation

The building control officer should be notified before the job begins to ensure compliance with regulations and to address any necessary permits or inspections early in the process.

The Local Authority should be notified in which of the situations listed below?

• When private water supplies are concerned

• When a connection is made to an undertakers supply

• After commissioning

• Before commencing any work relating to a building

Answer explanation

The Local Authority must be notified when private water supplies are concerned to ensure safety and compliance with regulations. This is crucial for monitoring and managing water quality.

What is shown?

• Water Softener

• Reverse Osmosis Machine

• Water Booster Pump

• Power Flusher

Answer explanation

The image depicts a Water Booster Pump, which is designed to increase water pressure in a plumbing system. This distinguishes it from a water softener, reverse osmosis machine, or power flusher, which serve different functions.

A combination bath shower mixer would require which type of protection?

• HC

• DC

• AUK3

• DCV

Answer explanation

A combination bath shower mixer requires HC (High Capacity) protection to ensure safe operation and prevent backflow, making it the correct choice over the other options.

A charge in an accumulator is usually less that the operating pressure in a cold water system by how much?

• 10 bar

• 1.5 bar

• 2.5 bar

• 5 bar

Answer explanation

In a cold water system, the charge in an accumulator is typically set to be 1.5 bar less than the operating pressure. This ensures proper system functionality and efficiency, making 1.5 bar the correct choice.

If a job has been interrupted and the pipework is to be uncommissioned, what must the plumber do?

• Attach Sure-STOPs to every open end.

• Cap off all open ends except primaries

• All open ends must be capped off

• Don't start the work unless you an finish in the same day

Answer explanation

Capping off all open ends is essential to prevent leaks and ensure safety when uncommissioning pipework. This choice ensures that no open ends are left exposed, which could lead to potential hazards.

Pressure switches located upstream and downstream will detect the performance of which device?

• Infrared tap

• Pressure vessel

• Booster pump

• CWSC

Answer explanation

Pressure switches upstream and downstream monitor the pressure changes caused by the operation of a booster pump, which is responsible for increasing fluid pressure in a system.

What would an approved contractor do if microbiological matter were found in a pipework system?

• Remove with reverse osmosis.

• Boil the water in the pipe

• Disinfect the system

• Report the problem to the local authority.

Answer explanation

An approved contractor would disinfect the system to eliminate any microbiological matter found in the pipework. This ensures the water is safe for use, unlike the other options which are not effective solutions.

What is the device shown?

• Water Softener

• Relay Valve

• Sure Stop Valve

• Running Pressure Valve

Answer explanation

The Sure Stop Valve is designed to prevent backflow and ensure safety in plumbing systems. Its distinct features differentiate it from a water softener, relay valve, or running pressure valve.