Cold Water Mock 1 PDF - Multiple Choice Questions

# COLD WATER MOCK 1 ## Multiple Choice **1**. Details of the minimum amount of headroom required above a Cold Water Storage Cistern, to enable maintenance work, can be found in the: - Installation plan - Construction Regulations - Job specification - **Water Regulations Guide.** **2**. The minimu...

# COLD WATER MOCK 1 ## Multiple Choice **1**. Details of the minimum amount of headroom required above a Cold Water Storage Cistern, to enable maintenance work, can be found in the: - Installation plan - Construction Regulations - Job specification - **Water Regulations Guide.** **2**. The minimum diameter of an incoming cold water service pipe to a dwelling is - 15 mm - 12 mm - 22 mm - **28 mm.** **3**. The incoming water flow rate to a property has been confirmed as 6 litres / minute. What is this reading in litres / second? - 0.061/s. - **0.11/s.** - 0.121/s. - 0.61 /s. **4**. Which one of the following is not approved for use in Cold Water Systems installation? - Push fit copper fittings. - **Solder fittings with lead / tin solder.** - Type 'A' compression fittings. - Type 'B' compression fittings. **5**. A Cold Water System where all cold water draw-off points, except the draw-off point at the sink, are fed from a storage cistern is called - a Direct Cold Water System - **an Indirect Cold Water System** - a Combined Cold Water System - a Secondary Cold Water System. **6**. A Cold Water Service pipe to a dwelling should be laid between - 550 mm and 1000 mm below ground level - 650 mm and 1350 mm below ground level - **750 mm and 1350 mm below ground level** - 750 mm and 2000 mm below ground level. **7**. The correct tool for cutting holes in a plastic Cold Water Storage cistern is a - keyhole saw - **hole saw** - pre-heated piece of copper pipe - sharpened piece of steel pipe **8**. The British Standard symbol shown in Figure 1 indicates a - float valve - check valve - **supply stop valve** - drain valve. **9**. With reference to Cold Water Storage cisterns, a common warning and overflow pipe should be used with cisterns of less than which of the following capacities? - 1000 litres. - 1500 litres. - 2000 litres. - **2500 litres.** **10**. Which one of the following should be positioned immediately above the cold water supply stop valve, near the point of entry to a building? - Servicing valve. - **Automatic air release.** - Drain valve. - Float operated valve. **11**. Which one of the following methods of jointing copper tube should not be used for underground service pipe connections? - **Type A, non-manipulative compression fitting.** - Type B, manipulative compression fitting. - Integral solder ring capillary fitting. - Endfeed solder capillary fitting. **12**. When the cylinder cold feed and a cold distributing pipe are connected to the same cold water storage cistern, the - two pipes must be connected on opposite sides of the cistern - two pipes must be connected at the same height from the cistern base - **cylinder cold feed pipe must be lower than the distribution pipe.** - cold distribution pipe must be lower than the cylinder cold feed pipe. **13**. Which one of the following pipes should be connected to a cold water storage cistern by means of a filtered connection? - Vent pipe. - Distribution pipe. - **Cold feed pipe.** - Overflow / warning pipe. **14**. Which one of the following must not be used for making connections between systems pipework and cold water storage cisterns? - Plastic jointing washers. - Lead free solder fittings. - **Oil based jointing compounds.** - Non-manipulative compression fittings. **15**. The Water Regulations require that the soundness test period on accessible copper cold water supply pipes shall be for - two hours, at a test pressure of 1.5 times the working pressure - thirty minutes at a test pressure of twice the working pressure - one hour at a test pressure of twice the working pressure - **one hour, at a test pressure of 1.5 times the working pressure.** **16**. Which one of the following shows the type of soundness test required by the Water Regulations for Cold Water systems? - Air test. - **Hydraulic test.** - Smoke test. - Earth continuity test. **17**. When building or water systems plans are not available, it can be established if the cold water system installed in a dwelling is a direct or an indirect supply system by - checking the diameter of the incoming cold water service - measuring the dimensions of the hot water storage cylinder - **inspecting the pipework connections from the cold water cistern** - checking the time that it takes for the WC cistern to fill. **18**. Major refurbishment is being carried out on a large occupied dwelling. Which one of the following should be advised before the cold water supply to the dwelling is taken out of service? - The customer only. - The foreman bricklayer. - The foreman carpenter. - **The customer and other trades.** **19**. Which one of the following must be carried out prior to commencing work on moving an instantaneous electric water heater, from over a sink to a new position? - Turn off the electrical supply at the water heater, tape over the switch and carry on with the work. - **Isolate the heater from the electrical supply at the consumer unit, by removing and retaining the fuse, and check for safe isolation.** - Check that the electrical supply to the new heater position is of the correct rating. - Ask the customer to turn off the electrical supply and isolate the heater. **20**. The Cold Water supply pipe at the supply stop valve must be cut or disconnected and blanked off - to prevent dirt entering the service pipe when a system is being flushed out - to prevent disinfectant entering the mains through the service pipe during disinfection - **when a system is being permanently decommissioned** - when a soundness test is being carried out on a system. **21**. When a cold water system is temporarily decommissioned to permit maintenance work, it is advisable to place a warning notice saying 'do not turn on' when - a WC float valve, controlled by a service valve is being maintained - **the cold water supply is turned off at the main stop valve to permit the installation of a WC** - a Cold Water Storage cistern float valve is being maintained by isolating the servicing valve - a cold distributing pipe from a storage cistern controlled by an inlet service valve is being replaced. **22**. A record of the decommissioning of a cold water system should be completed for - all Indirect Cold Water Systems in any property - all Direct Cold Water Systems in any property - systems installed in industrial premises - **all systems installed in dwellings.** **23**. Information regarding the maintenance requirements for a shower mixer can be found in - the manufacturer's instructions - the systems installation plan - current Water Regulations - **British Standard 6700.** **24**. Which of the following is most likely to present a water contamination risk? - **Incorrectly linked cold water storage cisterns.** - A WC pan not in regular use. - A 22 mm supply pipe that should have been 15 mm. - A straight run of cold water pipe exceeding 3 m. **25**. Which one of the following trades may require a temporary cold water supply when the main supply is to be isolated for maintenance purposes? - Electrical. - Carpentry. - **Carpet fitting.** - Bricklaying. **26**. Ceramic discs would be required to carry out maintenance on a - spherical service valve - portsmouth type float valve - **quarter turn pillar tap** - screwdown bib tap. **27**. In which one of the following cold water components is it possible to replace the valve seating? - Spherical service valve. - Fullway gate valve. - Quarter turn sink pillar tap. - **Float valve to BS 1212.** **28**. Safe access equipment will usually be required when working on - the mixer tap to a sink drainer - the float valve to a close coupled WC suite - a shower mixer valve and hose - **the float valve to a cold water storage cistern.** **29**. The performance specification for a water softener can be found in the - current Water Regulations - **manufacturer's technical information** - job specification for the installation - system layout plan. **30**. Statutory requirements covering the capacity of WC cisterns can be found in the - Water Supply (Water Fittings) Regulations 1999 - Control of Substances Hazardous to Health Regulations 1992 - Workplace (Health, Welfare and Safety) Regulations - Health and Safety etc Act 1974. **31**. Which one of the following system components is maintained by checking the spindle action for ease of opening and closing after tightening the packing gland? - Float valve. - Fullway valve. - Spherical plug valve. - **Quarter turn pillar tap.** **32**. Which one of the following system components is maintained by checking the opening and closing action and adjusting for correct water level? - Spherical plug valve. - **Quarter turn pillar tap.** - Fullway valve. - Float valve. **33**. A plumber cannot rectify a fault with a plumbing system. On leaving the property, which of the following is the best course of action to avoid a potential complaint from the customer in the future? - Verbally advise the customer of the problem only. - Complete a job record only. - **Advise the customer verbally and complete a job record.** - No specific action is required. **34**. A plumber finds that routine servicing and maintenance of a sink mixer valve does not correct a fault in the component. The plumber should - advise the customer that no further action can be taken - **seek advice from his / her supervisor on the next steps** - raise the matter with the Health and Safety Executive - contact the Local Authority for advice and guidance. **35**. It is necessary to carry out maintenance on the cold water supply stop valve in an office block. The work is not expected to take longer than 3 hours, and the system is a Direct Cold Water System. The appropriate action required to minimise cost and inconvenience would be to - **advise the customer that it will be necessary to take all toilet accommodation out of use, and that it would be better to complete the work outside of normal working hours** - take all toilet accommodation out of use and place warning notices on all toilet doors to advise building occupants that the WCs cannot be used until work has finished - install a temporary cold water supply to half of the toilet accommodation - arrange to provide temporary portable toilets for the duration of the work. **36**. The minimum distance below the invert of the warning pipe, at which the water level should be set in a cold water storage cistern after re-washering the float valve, is - 25 mm - 35 mm - 40 mm - **55 mm.** **37**. Which one of the following installation practices helps to reduce noise in copper pipework? - Removing all flux from soldered fittings prior to fixing. - Ensuring that fittings are used instead of pipe bends. - Ensuring that pipework is suitably and securely fixed. - **Using hand bending methods instead of machine bends.** **38**. A supply pipe is leaking where it enters a house in a tiled shower room. The pipe is copper, the leak is just above floor level and the pipe in the area of the leak is green. The most likely cause of the problem would be that the pipe - is from a faulty batch - has been ruptured - **has been corroded by cleaning materials** - has been corroded by air in the water. **39**. When a screw down pillar tap on a sink drainer is opened, there is a high pitched vibration or whistling noise. The probable cause is that - the water pressure is set too high - the packing gland is loose - the tap is not set into the sink top correctly - **a washer is split or loose** **40**. When a cold water sink pillar tap is turned off quickly, there is a loud banging from the pipe duct in which the supply pipe rises to the bathroom, and cold water storage cistern. The appropriate action to rectify this problem is to - cut out the section of pipework and replace with a larger diameter pipe - provide additional fixings to secure the sink drainer to the wooden base - check that the pipework is securely clipped and add additional fixings if required - **re-washer the main stop valve and remove the main system drain valve.** **41**. Water Regulations do not permit the fixing of rigid screw-in type silencer tubes to float valves, because such devices - could become blocked and prevent the cistern from filling - can corrode and fall into the cistern causing contamination - **could cause backflow of water and subsequent contamination of the water supply** - can cause air to be injected into the cistern contents which will cause airlocks. **42**. The amount of noise being caused by a float valve in a storage cistern can be reduced by - changing the valve seating for a smaller diameter valve seating - fitting a larger float - fitting a longer lever arm - **clearing any grit or debris that has accumulated in the valve orifice.** **43**. The renewal of a section of copper pipework to a washbasin has to be left overnight for completion the next day. Which one of the following precautions should be taken in addition to closing the service valves to the wash basin? - Put wooden plugs tightly into pipe ends. - Label the service valves to say 'do not close'. - Ask the customer not to use the bathroom. - **Put 'push-fit' cap ends over any open pipework.** **44**. When renewing a cold feed and expansion cistern to an Indirect Domestic Hot Water System, the isolating valve to the cistern must be closed, and the - fuse for the hot water heating appliance from the consumer unit removed - **main cold water supply stop valve closed and labeled 'do not open'** - domestic hot water storage cylinder drained - main cold feed cistern and pipework drained. **45**. Before removing a section of copper pipework for maintenance purposes, all necessary controls must be closed, appropriate sections of pipework must be drained and - **temporary earth continuity bonding must be applied** - the supply pressure to the all hot and cold pipes checked - checks made that the householder has sufficient water for use during the repair - the Water Undertaker must be notified by phone before removing the pipe.