APCO FINAL PAPER FULL QUESTIONS
AND CORRECT ANSWERS REVIEW
MATERIAL
●● What are solid lubricants used for
Answer: To provide full film lubrication
●● What is another term for deteriorated grease
Answer: Oxidized grease
●● What causes foaming of oil
Answer: Absorption of air
●● What is emulsification
Answer: Mixing dissimilar fluids (oil and water)
●● What causes furnace to explode
Answer: Delayed ignition
●● Why is superheated steam used in turbine
Answer: Because it is dry and will not damage blades
,●● As temperature and pressure of a steam/water mixture increases,
what happens to their density
Answer: Both of their density's decrease
●● What is specific gravity
Answer: Relative to density of water or air
●● What is the highest temperature that water can exist at a liquid state
Answer: 705.5°F
●● What is the pressure of total vacuum
Answer: 0 psia(0 psia= -14.7 psig)
●● What is a flammable liquid's flash point
Answer: Below 100
●● What is a combustible's flash point
Answer: Above 100
●● What is the purpose of primary air
Answer: Transport, dry, and preheat coal
,●● Where does primary air enter the furnace
Answer: Through the burner tips
●● Where does secondary air enter the boiler
Answer: Through the Wind Box
●● How do you adjust a short flame
Answer: Adjust air registers
●● What is a common method to ensure complete combustion
Answer: To produce turbulence with secondary air
●● What does high Co2 indicate
Answer: Excess air in the boiler(good indication)
●● How much air is required to burn 1 lb. of coal
Answer: 15 lbs.
●● How much of total air is secondary air
Answer: 70%
, ●● What is loss of ignition
Answer: The measure of the % of carbon in ash
●● Where does secondary air come from
Answer: FD Fan
●● What is the highest volume fan
Answer: ID Fan
●● What are the effects of an air heater leakage
Answer: A lower outlet gas temperature and an increase in fan loading
●● How do you find cold in mean temperature
Answer: (gas out + air in)/2
●● What is a riffle
Answer: A device that equally distributes fuel and air in coal pipes
●● What is proper atomization dependent upon
Answer: Atomizing air pressure
●● What is a control valve used for
AND CORRECT ANSWERS REVIEW
MATERIAL
●● What are solid lubricants used for
Answer: To provide full film lubrication
●● What is another term for deteriorated grease
Answer: Oxidized grease
●● What causes foaming of oil
Answer: Absorption of air
●● What is emulsification
Answer: Mixing dissimilar fluids (oil and water)
●● What causes furnace to explode
Answer: Delayed ignition
●● Why is superheated steam used in turbine
Answer: Because it is dry and will not damage blades
,●● As temperature and pressure of a steam/water mixture increases,
what happens to their density
Answer: Both of their density's decrease
●● What is specific gravity
Answer: Relative to density of water or air
●● What is the highest temperature that water can exist at a liquid state
Answer: 705.5°F
●● What is the pressure of total vacuum
Answer: 0 psia(0 psia= -14.7 psig)
●● What is a flammable liquid's flash point
Answer: Below 100
●● What is a combustible's flash point
Answer: Above 100
●● What is the purpose of primary air
Answer: Transport, dry, and preheat coal
,●● Where does primary air enter the furnace
Answer: Through the burner tips
●● Where does secondary air enter the boiler
Answer: Through the Wind Box
●● How do you adjust a short flame
Answer: Adjust air registers
●● What is a common method to ensure complete combustion
Answer: To produce turbulence with secondary air
●● What does high Co2 indicate
Answer: Excess air in the boiler(good indication)
●● How much air is required to burn 1 lb. of coal
Answer: 15 lbs.
●● How much of total air is secondary air
Answer: 70%
, ●● What is loss of ignition
Answer: The measure of the % of carbon in ash
●● Where does secondary air come from
Answer: FD Fan
●● What is the highest volume fan
Answer: ID Fan
●● What are the effects of an air heater leakage
Answer: A lower outlet gas temperature and an increase in fan loading
●● How do you find cold in mean temperature
Answer: (gas out + air in)/2
●● What is a riffle
Answer: A device that equally distributes fuel and air in coal pipes
●● What is proper atomization dependent upon
Answer: Atomizing air pressure
●● What is a control valve used for
