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Quiz von Jarmo Tossavainen, aktualisiert more than 1 year ago
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Erstellt von Jarmo Tossavainen
vor etwa 6 Jahre
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Frage 1
Frage
A heating circuit in which the flow and return pipes are completely separated until they connect to the boiler is known as a
Antworten
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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.
Frage 2
Frage
A British Standard that includes detail on the requirements for installing open vented central heating systems in dwellings is
Antworten
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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.
Frage 3
Frage
Which pipe connects to port X in the diagram of an air separator below?
Antworten
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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.
Frage 4
Frage
What is the recommended actual capacity of the feed and expansion cistern
in a small open vented indirect central heating system?
Antworten
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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.
Frage 5
Antworten
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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.
Frage 6
Frage
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?
Antworten
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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.
Frage 7
Frage
What is the recommended maximum clip spacing distance for a vertical 15 mm copper pipe?
Antworten
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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.
Frage 8
Frage
The Domestic Heating Compliance Guide supports which document?
Antworten
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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.
Frage 9
Frage
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
Antworten
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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.
Frage 10
Frage
What type of heat emitter is shown in the following photograph?
Antworten
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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.
Frage 11
Frage
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?
Antworten
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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.
Frage 12
Frage
The minimum size of the cold feed pipe to a fully pumped heating system in a domestic dwelling is
Antworten
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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.
Frage 13
Frage
A three-port mid-position valve can provide heated water to
Antworten
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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.
Frage 14
Frage
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?
Antworten
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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.
Frage 15
Frage
Water in a wet central heating system is normally treated with
Antworten
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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.
Frage 16
Frage
What type of central heating component is shown in the photograph below?
Antworten
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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.
Frage 17
Frage
The method by which panel radiators transmit most of their heat is
Antworten
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a) conduction
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b) convection
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c) radiation
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d) condensation.
Frage 18
Frage
The water level in the feed and expansion cistern of a central heating system should be set to allow sufficient room for
Antworten
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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.
Frage 19
Frage
The normal position for a cylinder thermostat that is strapped to a cylinder is approximately
Antworten
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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.
Frage 20
Frage
The type of heating system that uses 2 x two port motorised valves is known as a
Antworten
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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.
Frage 21
Frage
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?
Antworten
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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.
Frage 22
Frage
A central heating control component which can regulate the on/off periods of two or more zones in a system is known as a
Antworten
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frost thermostat
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room thermostat
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thermo-mechanical valve
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programmer.
Frage 23
Frage
Before you carry out a hydraulic pressure test on a new central heating system you should perform
Antworten
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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.
Frage 24
Frage
The following diagram shows the actions of which component in a heating system?
Antworten
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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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