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WorksheetsPhase 3 Revision
Total questions: 15
Worksheet time: 8mins
What is the correct ratio of gas and oxygen required for complete combustion
C4 + O2
CH4 + CO2
CH4 + 2O2
CH4 + O2
What three components are required to create fire
Oxygen + Fuel + Ignition
Carbon Dioxide + Fuel + Ignition
Carbon Monoxide + Fuel + Ignition
Nitrogen + Fuel + Ignition
what is the correct ratio for complete combustion when CH4 + 2O2 =
CO + H2S
CH4 + CO2
CO2 + 2H2O
H2S + 2H2O
What is a sign of complete combustion of natural gas
very tight yellow flame
very tight blue flame
vey floppy yellow flame
Very floppy blue flame
Open Flue chimney system operates on what principle
cold air which is more dense than hot air will rises and travel up the flue
hot air which is more dense than cold air will rises and travel up the flue
cold air which is less dense than hot air will rises and travel up the flue
hot air which is less dense than cold air will rises and travel up the flue
what is the definition of a down draught diverter
form of draught break intended to prevent conditions in the main length of flue from interfering with the combustion performance of an open-flued appliance. It allows the appliance to operate without interference from adverse wind conditions and excessive draught.
factory-made counter-balanced flap device admitting air to the flue, from the same space as the combustion air, to prevent excessive variations in the draught. It is usual for these to be in the fluepipe or chimney, but they may be located on the appliance.
what is the definition of a draught stabiliser
is a form of draught break intended to prevent conditions in the main length of flue from interfering with the combustion performance of an open-flued appliance. It allows the appliance to operate without interference from down-draughts that may occur in adverse wind conditions and excessive draught.
is a factory-made counter-balanced flap device admitting air to the flue, from the same space as the combustion air, to prevent excessive variations in the draught. It is usual for these to be in the fluepipe or chimney, but they may be located on the appliance.
what is the height of a flue chimney system next to an adjacent structure
600mm
1200mm
900mm
300mm
what test is used to check flue integrity
flue flow
spillage
what test is used to confirm safe operation of an open flue boiler flue system when it is switched on
flue flow
spillage
what is the fuse rating of a 11kw electric shower
3A
10A
32A
45A
when using electrical tools on-site where the conditions are potentially damp what voltage of tool would be correct
230v ac RCD protected
110 cv reduced voltage supply
wind generation needs to comply with what regulations
building regulations
british standards
gas industry standards
town & country planning regulations
Solar photovoltaic (PV) is used for
generating electricity
generating hot water
is LPG heavier than air
Yes, it sinks and must not be stored near drains
No, it floats and can be stored near drains
