1) What primary legislation governs an employee's safety at work? a) ACOP b) HASAWA c) COSHH d) HSAWR 2) Why must gloves be worn when handling lead? a) It improves grip b) It prevents lead from damage c) Prevent absorption of lead through the skin d) Prevent long term corrosion the sheet lead 3) What colour coding indicates 110V for electrical equipment on site? a) Blue b) Red c) Yellow d) White 4) What substance can lead to the development of Mesothelioma? a) Asbestos b) Flux c) Lead d) LPG 5) Which are the duties of operatives on a construction site? a) Check competence, cooperate with others and report obvious risks b) Order materials, report obvious risks and check competence of appointee's c) Secure site, supply PPE and report obvious risks d) Secure the site, supply PPE and check welfare facilities. 6) What is the correct isolation of a shower? a) Isolate at consumer unit or remove fuse place warning notice, inform customer b) Identify circuit check circuit is dead, inform customer, and place notice. c) Identify circuit, check for continuity, lock off isolator, place notice d) Isolate at consumer unit, remove fuse, check circuit is dead. Lock off isolator, place notice. 7) What type of extinguisher is suitable for all items listed 1,2,3,4, and 5. 1 Wood, 2 Oil, 3 Propane, 4 Aluminium, 5 Electrics a) Foam b) CO2 c) Water d) Powder 8) What is the safe step to take once exposed asbestos material is dismantled? a) Take to recycling centre ensuring prior notification b) Take to recycling centre ensuring it is single bagged c) Take to recycling centre ensuring it is Doubled bagged d) Take to recycling centre to be disposed of in landfill 9) A fire has started in a boiler, why should a cream fire extinguisher not be used? a) Moisture content can lead to electric shock b) Excessive inhalation of gas suppressant from fire extinguisher c) Excessive contact of powder from extinguisher will cause dermatitis d) Content of extinguisher will react with boiler flue gasses 10) Identify the component shown. a) Expanding metal cavity fixing b) Spring toggle fixing c) Self- cutting fixing d) Rawl bolt 11) What is the diameter pipework clipped at 1.2m horizontally and 1.8m vertically? a) 10mm b) 15mm c) 22mm d) 28mm 12) Why is the component shown installed in soil pipework? a) To comply with building regulation F b) To stop the ingress of vermin c) Reduce the risk of fire d) Prevent fire leaving the room it originated 13) What risk would occur installing a plastic float operated valve in a CWSC in a loft? a) Increase pressure at the inlet b) Freezing temperatures would freeze the plastic c) Higher temperature will distort the plastic d) Water hammer at the tap outlets 14) Identify the figure shown.  a) Press fit elbow b) Push fit elbow c) Integral solder elbow d) Compression elbow 15) What enables solder to be drawn into copper fittings during the soldering process? a) Gravity attraction b) Oxidisation c) Capillary action d) Dezincification 16) Which metal is known to be ferrous? a) Copper b) Iron c) Zinc d) Lead 17) What shows a brass fitting is subject to dezincification? a) The fitting becomes black b) It becomes noisy when used c) Pitting occurs on the surface d) White powdery coating is visible on the surface of the fitting 18) Calculate energy required to heat 140 litres of water from 4°c to 80 °c a) 44,539.04 KJ b) 46,883. 2 KJ c) 4, 166.4 KJ d) 45,768.02 KJ 19) What is the expansion rate of water when it turns from a liquid to a gas? a) 160 times b) 1600 times c) 16,000 times d) 160, 000 times 20) Which 6m length of pipe will offer the greatest resistance to the flow of water? a) 15mm pipework with 4 elbows b) 15mm pipework with 4 machine bends c) 15mm pipework with 2 machine bends and 2 elbows d) 22mm pipe reducing to 15mm halfway along it's length 21) There is no insulation on a cold-water storage cistern what may this lead to? a) Increased risk to bacterial growth during hot temperatures b) Fluid category 1 at the outlets during hot temperatures c) Increased risk of legionella during cold temperatures d) Water changing to PH7 during cold temperatures 22) A crack appears where pipework passes through a wall, what caused the damage? a) Incorrect type of plaster used b) Pipework not painted c) No sleeve on the pipework to allow for heat movement d) No pipe covers were used to prevent cracking 23) What would cause a 10 year guttering system to become brittle or weak? a) Deterioration of plastic from exposure to wind and rain b) Deterioration of plastic from exposure to ultraviolet rays c) Corrosion due to air pollution d) Conduction from the flue outlet 24) A 3m length of copper tube is raised form 15°c to 60°c. Coefficient of copper is 0.000017 m/m°C, What length would the pipework increase by? a) 0. 2295mm b) 0.459mm c) 2.295mm d) 45.9mm 25) What is the correct definition of a direct current? a) Circuit reverses direction intermittently through the circuit b) Where electrons flow from positive to negative c) Current reverses direction constantly through the circuit d) Electrons always flow from negative to positive 26) An overcurrent protection device of 5a is installed on a 230v supply. What is the maximum load allowed on the circuit? a) 0.SW b) 115 W c) 1. 15 KW d) 11.5 KW 27) Which item is used for temporary continuity bonding when cutting into copper pipe? a) b) c) d) 28) Which Statement best describes a borehole? a) A well drilled directly to below ground water source b) Water that rises from underground water bearing rock layers c) A hand dug well penetrating the first water bearing strata d) Water collected from guttering filtered and cleaned before use in WC's 29) What statement describes rainwater harvesting a) Water collected when a boiler is condensing. Filtered, cleaned used for WC's b) Water from a borehole filtered, cleaned used on WC's c) Water collected from wash basins filtered, cleaned used to flush WC's d) Water collected from guttering, filtered, cleaned used to flush WC's 30) On what method of water treatment can a Schmutzdecke be found? a) Sedimentation b) Reverse osmosis c) Slow filtration d) Rapid sand filtration 31) What do the water regulations 1999 prevent? a) Contamination of water b) Condensation of bathrooms c) Poor efficiency of stored water d) Boiler cycling when not required 32) Why must the visibility of MDPE pipework be limited? a) Will decompose exposed to ultraviolet light in daylight b) Less ductile than other materials c) Becomes toxic when exposed to ultraviolet light in daylight d) Less malleable than other materials 33) What is an advantage of an indirect cold-water system? a) Less risk of backflow b) Less pipework c) Smaller size pipes d) Cheaper to install 34) Water is discharging from pipework penetrating the facia board. What is the likely fault? a) Siphon washer is split b) Tap washer not sealed correctly c) Split diaphragm washer on float operated valve d) Blocked bath trap due to excessive hair 35) A water main bursts an electric shower is submerged creating back siphonage. How can this be prevented in the future? a) Shower must be fed vis a shock arrestor b) Shower must have a double check valve installed c) Shower must have a RPZ valve installed d) Shower must be fed via a cold-water booster pump 36) what hot water system is shown? a) Single feed indirect b) Direct open vented c) Double feed indirect d) Unvented 37) When would a expansion vessel not be needed on a under sink storage water heater? a) Where the correct discharge pipework is used b) Where an expansion relief valve is installed c) Where a pressure reducing valve is installed d) Where the water heater has an open vented tap 38) What is the maximum for a bath in building regulations part G? a) 38°c b) 43°c c) 48°c d) 65°c 39) What material is a circulator (pump) made from used on a secondary circuit? a) Bronze and stainless steel b) Iron and stainless steel c) Tin and copper d) Iron and copper 40) Why must hot and cold water be balanced when installing a shower mixer valve? a) To reduce maintenance and installation time reducing costs b) To ensure no dead legs t prevent bacterial growth c) To reduce flow rates to prevent undue consumption d) To ensure equal flow rate and pressure to prevent scalding 41) What is the test pressure and duration of rigid pipework? a) 1.5 times working pressure for 3 hours b) 2 times working pressure for 1 hour c) 2 times working pressure for 3 hours d) 1.5 times working pressure for 1 hour 42) When replacing a set of taps the appliance isolation valve fails to work. What action must be taken? a) Isolate at the main stop cock b) Isolate at the open vent c) Isolate at the filling loop d) laolate at the primary flow pipework 43) The installation of which appliance will give poor hot water pressure in a flat? a) Sealed solar thermal hot water system b) Unvented hot water system c) Combination boiler d) Fortic combination cylinder 44) A soundness test is 30 minutes in the pressure drop is 0.2 bar, but there is no leak. What could be the cause? a) System is stabilising b) Test pressure is too high c) Test pressure is too low d) System pipework is blocked 45) Which statement describes the system shown? a) System installed correctly with correct installation of feed & expansion pipework. b) System installed incorrectly creating negative pressure in system c) System creates water pumping over the vent d) System installed correctly 46) What is the figure shown? a) Shock arrestor b) Expansion vessel c) Anti-gravity valve d) Magnetic filter 47) What type of heating system is shown? a) S Plan b) S Plan plus c) Y Plan d) C Plan 48) What is the advantage of using natural gas instead of LPG in a domestic property? a) It has higher pressure b) Costs less to purchase c) It has no smell d) It is a carbon neutral 49) What is the procedure for decommissioning a central heating system? a) Notify manufacturer's drain system, isolate water, and electrics cap pipework b) Isolate water, drain system, notify manufacturer cap open ended pipework c) Notify customer, isolate water, and electrics, drain system cap open pipework d) Cap open pipework, drain system, isolate water and electrics. Notify customer 50) What is the maximum distance between each bracket for PVC Guttering? a) 0.6m b) 0.8m c) 1.0m d) 1.2m 51) All radiators in a recent installation are hot except one. What action do you take? a) Turn off the system immediately b) Add more inhibitor c) Replace the radiator d) Check for air in the radiator 52) What type of guttering is shown? a) Half round b) High capacity c) Square d) Ogee 53) How is a leaking PVCu guttering joint maintained? a) Remove defective fitting, clean and silicone the joint b) Replace the defective fitting like for like c) Replace defective fitting, clean, apply plumbers' putty d) Replace the section of the downpipe 54) A tap is leaking after being re- washered. What action should be taken? a) Replace the diaphragm washer b) Re-seat the tap c) Replace the tap d) Remove the fibre washer 55) What faut has led to a central heating system having to be power flushed? a) Radiators hot when boilers operating for hot water only b) Number of radiators on the downstairs are only lukewarm c) Boiler interlock prevents boiler operating when manually controlled d) Dis-coloured water appearing at hot taps 56) Why is connection to the shaded area prohibited on a primary ventilated stack? a) System would corrode on opposite connection b) Would cause compression in the stack c) Cause trap seal loss at opposite end of connection d) Would cause leakage over prolonged use 57) Water discharged from a basin forms a plug of water creating a vacuum pulling the water from the trap. What does this statement describe? a) Self -siphonage b) Capillary action c) Wavering out d) Evaporation 58) What is the maximum length 32mm waste pipe can be installed? a) 1.2m b) 1.7m c) 4.0m d) 6.0m 59) What type of trap is shown? a) P trap b) S trap c) Running trap d) Bottle trap

Plumbing final exam 3.

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