13737687
Descripción
Creado por Jarmo Tossavainen
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Creado por Jarmo Tossavainen
hace más de 8 años
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Pregunta 1
Pregunta
A heating circuit in which the flow and return pipes are completely separated until they connect to the boiler is known as a
Respuesta
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a) one pipe system
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b) two pipe system
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c) sealed system
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d) gravity system.
Pregunta 2
Pregunta
A British Standard that includes detail on the requirements for installing open vented central heating systems in dwellings is
Respuesta
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a) BS EN 12056
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b) BS 6700
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c) BS EN 12828
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d) BS 5449.
Pregunta 3
Pregunta
Which pipe connects to port X in the diagram of an air separator below?
Respuesta
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a) Open vent pipe.
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b) Primary flow to system.
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c) Primary flow from boiler.
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d) Cold feed pipe.
Pregunta 4
Pregunta
What is the recommended actual capacity of the feed and expansion cistern
in a small open vented indirect central heating system?
Respuesta
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a) 6 litres
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b) 18 litres
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c) 52 litres
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d) 100 litres.
Pregunta 5
Respuesta
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a) Temperature relief valve.
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b) Pressure relief valve.
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c) Pressure regulating valve.
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d) Thermostatic radiator valve.
Pregunta 6
Pregunta
Which one of the following gas boilers overcomes the need for a cold water
storage cistern, feed and expansion cistern and hot water storage vessel?
Respuesta
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a) Back-boiler.
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b) Traditional.
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c) Combination.
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d) Room-heater.
Pregunta 7
Pregunta
What is the recommended maximum clip spacing distance for a vertical 15 mm copper pipe?
Respuesta
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a) 1200 mm.
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b) 1800 mm.
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c) 2000 mm.
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d) 2500 mm.
Pregunta 8
Pregunta
The Domestic Heating Compliance Guide supports which document?
Respuesta
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a) British Standard 8000.
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b) The Water Supply (Water Fittings) Regulations.
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c) British Standard 5449.
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d) Building Regulations Approved Document L1.
Pregunta 9
Pregunta
Minimum controls which must be provided when replacing a gravity fed cylinder supplied from a gas boiler, as laid down in the Domestic Heating Compliance Guide, is
Respuesta
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a) a thermo-mechanical thermostat
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b) no minimum control required
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c) fully motorised two port valve
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d) electronic thermostat.
Pregunta 10
Pregunta
What type of heat emitter is shown in the following photograph?
Respuesta
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a)Hospital radiator.
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b) Panel radiator.
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c) Column radiator.
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d) Skirting heater.
Pregunta 11
Pregunta
The drawing below shows the connection arrangements to a feed and expansion cistern, pump, open vent and cold feed pipe. What is the likely outcome of positioning the system in the left shown?
Respuesta
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a) The cold feed pipe is at the point of highest positive pressure.
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b) The system will be largely under negative pressure.
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c) A neutral pressure will be maintained in all system pipework.
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d) The system will pump over the open vent pipe.
Pregunta 12
Pregunta
The minimum size of the cold feed pipe to a fully pumped heating system in a domestic dwelling is
Respuesta
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a) 15 mm
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b) 22 mm
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c) 28 mm
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d) 35 mm.
Pregunta 13
Pregunta
A three-port mid-position valve can provide heated water to
Respuesta
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a) only the heating circuit
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b) only the hot water circuit
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c) both the heating and hot water circuit, but not both together
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d) both the heating or hot water circuit and both together.
Pregunta 14
Pregunta
What type of central heating control component is normally used in conjunction with a frost thermostat to conserve energy when exposed parts of a central heating system are required to be protected against frost damage?
Respuesta
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a) Room thermostat
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b) Pipe thermostat.
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c) Automatic bypass valve.
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d) Frost relief valve.
Pregunta 15
Pregunta
Water in a wet central heating system is normally treated with
Respuesta
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a) sodium hypochlorite
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b) corrosion inhibitor
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c) caustic soda solution
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d) disinfectant.
Pregunta 16
Pregunta
What type of central heating component is shown in the photograph below?
Respuesta
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a) Programmer.
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b) Timer.
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c) Motorised valve.
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d) Room thermostat.
Pregunta 17
Pregunta
The method by which panel radiators transmit most of their heat is
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a) conduction
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b) convection
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c) radiation
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d) condensation.
Pregunta 18
Pregunta
The water level in the feed and expansion cistern of a central heating system should be set to allow sufficient room for
Respuesta
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a) thermal expansion of the water
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b) coping with pumping over
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c) air venting
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d) reduction of noise when filling.
Pregunta 19
Pregunta
The normal position for a cylinder thermostat that is strapped to a cylinder is approximately
Respuesta
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a) at the top of the cylinder
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b) a third of the way down the cylinder from the top
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c) half way down the cylinder
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d) a third of the way up from the bottom of the cylinder.
Pregunta 20
Pregunta
The type of heating system that uses 2 x two port motorised valves is known as a
Respuesta
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a) A thermostatic radiator valve.
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b) A lockshield type valve.
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c) A wheelhead type valve.
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d) An electro mechanical valve.
Pregunta 21
Pregunta
Which component is used in a heating system fitted with a low water content boiler to ensure that a minimum water flow rate is maintained through the boiler heat exchanger at all times?
Respuesta
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a) Automatic bypass valve.
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b) Pressure relief valve.
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c) Pressure reducing valve.
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d) Lockshield gate valve.
Pregunta 22
Pregunta
A central heating control component which can regulate the on/off periods of two or more zones in a system is known as a
Respuesta
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frost thermostat
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room thermostat
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thermo-mechanical valve
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programmer.
Pregunta 23
Pregunta
Before you carry out a hydraulic pressure test on a new central heating system you should perform
Respuesta
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a) a full disinfection of the system
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b) a hot flush of the system and add corrosion inhibitor
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c) a visual inspection of the system
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d) a heat loss calculation of the system.
Pregunta 24
Pregunta
The following diagram shows the actions of which component in a heating system?
Respuesta
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a) Boiler fan.
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b) Circulating pump.
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c) Shower pump.
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d) Diverter valve.
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