I

III. Refuse Burning1. Which of the following is a problem with melting of aluminum and glass in furnaces?

a. Forms slag on economizer surfaces

b. Blocks grate air passages

c. Increases SO2 emissions

d. Causes degradation of boiler tubes2. Trace metals such as lead become an exposure hazard to personnel that come in contact with _______________.

a. Flue Gas

b. Excess Air

c. Fly Ash & Bottom Ash

d. CEMs3. The mixing and fluffing action of the grate system causes most of the volatiles in the refuse to_______________.

a. Burn in suspension

b. Burn directly on the bed

c. Be removed by the electrostatic precipitators

d. Melt into the ash4. In a balanced draft furnace the _____________ fan(s) control furnace pressure.

a. Forced Draft

b. Underfire Air

c. Overfire Air

d. Induced Draft5. Air heater average cold-end temperature refers to the temperature of the ___________________ the air heater.

a. Air and Gas entering

b. Air and Gas exiting

c. Air entering and Gas exiting

d. Air exiting and Gas entering6. Two common air heater classifications are ________________________.

a. Moving and Stationary

b. Recuperative and Regenerative

c. Once-through and Counter Flow

d. Finned tube and Recuperative7. Reciprocating stoker grates consist of ____________________________.

a. A continuous chain

b. A continuously rotating drum

c. Moving grates installed between stationary grates

d. A grate with no moving parts8. As a field operator on a balance draft boiler, you notice a furnace casing leak. Your response should be to

______________________________.

a. Plug the leak with whatever you find handy

b. Call the supervisor and await instructions

c. Trip the boiler

d. Dowse the leak with a fire hose 9. In what order are the fans started on a balance draft boiler ______________.

a. Primary air fan, Secondary air fan, Induced draft fan

b. Secondary air fan, Induced draft fan, Primary air fan

c. Primary air fan, induced draft fan, secondary air fan

d. Induced draft fan, primary air fan, secondary air fan

10. When a centrifugal fan is started _______________________.

a. The inlet damper should be fully open until reaches full speed

b. The inlet damper should be fully closed until it reaches full speed

c. The inlet damper should be opened only 15% until it reaches full speed

d. None of the Above11. Slag is formed on furnace surfaces when ______________ .

a. Fuel is burned in the presence of excess air

b. Flyash is heated to the ash fusion temperature

c. Steam is over-attemperated

d. Burning wet fuel12. The federal load limit for ash haulers is ____________.

a. 20,000 pounds

b. 40,000 pounds

c. 60,000 pounds

d. 80,000 pounds13. Federal regulations require that all federal haulers be at least ______________________

a. Six feet tall

b. 22 years of age

c. 25 years of age

d. six feet tall and 25 years of age14. A monofill is______________________.

a. Used in disposing mixed waste from various sources.

b. An area of a landfill used in disposing waste from various sources

c. Used in disposing one kind of ash

d. All of the Above15. Federal law requires that all ash haulers that transport ash weighing over ____________ have a federal license.

a. 80,000 lbs.

b. 20 tons

c. 26,000 lbs

d. 80 tons16. What is the density of ash from an incinerator when loaded in the truck, on the average?

a. 2 tons per cubic yard

b. 60 to 65 lbs per cubic ft.

c. 80 lbs. per cubic ft.

d. Greater than 150 lbs. per cubic ft.17. While operating the boiler you notice that the steam pressure is dropping, the flue gas oxygen level is rising, and the flue gas temperature is dropping. What is the most likely problem?

a. Excess primary air

b. Fuel is too dry

c. Fuel feed may have stopped

d. Excessively high Btu fuel18. In a Starved Air incinerator the combustion of volatile gas is achieved in the _____________________.

a. Primary Chamber

b. Secondary Chamber

c. Stack

d. Stoker Area19. Most boiler manufactures recommend a boiler-tube warm-up rate of ____________.

a. 500F to 1000F

b. 1000F to 1500F

c. 1500F to 2000F

d. 2000F to 2500F