Boiler Test 5

1.

What are the 3 classifications of oil burners?

Mechanical atomizing burners

Steam atomizing burners

Rotary cup oil burners

All of the above

2. A low gas pressure cutoff switch the_________ burrner from operating when the gas pressure in the supply-line drops below the pressure necessary to maintain a stable flame at the burner'

Promotes

Prevents

Opens

Raises

3. In a multi spud burner each spud is equipped with a ____ valve so thati it may be removed for cleaning

Cleaning

Shutoff

Globe

Regulating

4. By what two methods are ntrogen oxides forme in natural gas fired boilers?

Thermal NO2

Fuel NO2

Or both

5. What is added to the coal in a tvpical FBC unit to ensure that the heated compounds become relatatvly inert?

Coke

Limestone

Sulfur

Calcium sulphate

6. Before coal can be burned in a fluidized bed combustion unit, it is necessary to heat the inert bed materialto about ________deg F

1832

1112

2732

3632

7. Steam atomizing burners require cleaning

More often than the air atomizer'

More often than mechanical atomizers

Less often than mechanical atomizers

UsuallY onlY about twice a Year'

Just as often as mechanical atomizers

8. Using preheated air with pulverized coal

Dries the coal.

Helps reduce ash build uP.

Reduces air Pollution.

Allows lower grades of fuel to be used'

Increases the heating value of the coal'

9. A tvpical time to heat the: bed in a fluidized bed combustion unit to fuet-ignition temperature is _________hours.

4

5

3

1

10. NOX 2 emissions are reduced in a fluidized bed furnace due to the

Removal of nitrogen compounds.

Reduced combustion temperatures.

Levels of excess air.

Increased combustion temperatures.

11. Rhe combustion in a fluized bed combustion: unit can be controlled of a furnace temperature of ____________deg f reduce nox emission

932