What is the correct ratio of gas and oxygen required for complete combustion
Phase 3 Revision

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Science
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Professional Development
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Medium
Rob Anderson
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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
C4 + O2
CH4 + CO2
CH4 + 2O2
CH4 + O2
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What three components are required to create fire
Oxygen + Fuel + Ignition
Carbon Dioxide + Fuel + Ignition
Carbon Monoxide + Fuel + Ignition
Nitrogen + Fuel + Ignition
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
what is the correct ratio for complete combustion when CH4 + 2O2 =
CO + H2S
CH4 + CO2
CO2 + 2H2O
H2S + 2H2O
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
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
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
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
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
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.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
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.
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