Combustion of Gas 080302aA

Question 1

What effect does nitrogen have on combustion?

Answer 1

Nitrogen is considered to be a temperature reducing agent

Question 2

What percentage of combustion air is provided by primary air?

Answer 2

30-40%

Question 3

What percentage of excess air is provided to the quantity of primary and secondary air?

Answer 3

50%

Question 4

What happens to nitrogen during combustion?

Answer 4

It does not react

Question 5

What is the max exposure to carbon monoxide you can have over an 8 hour period?

Answer 5

50 ppm

Question 6

What is one of the negative effects of nitric oxide?

Answer 6

Reacts with moisture to produce ozone and acid rain

Question 7

How is sulfer dioxide found found in the products of combustion?

Answer 7

Trace amounts of sulfer in the fuel supply

Question 8

What are the most important by-products of combustion?

Answer 8

Heat and light

Question 9

Atmospheric systems depend entirely on what slightly negative flue pressure?

Answer 9

-0.02 to -0.04” w.c.

Question 10

Where is the fan located on a forced draft appliance?

Answer 10

Upstream of the burner

Question 11

Where is the fan located on an induced draft appliance?

Answer 11

Downstream of the burner

Question 12

What type of combustion air system on a burner is designed to overcome burner resistance only?

Answer 12

Fan-assisted burner