3B1 - Power engineering - practice
questions with complete solutions
1.2.3.5.6.
chp 2 - correct answer ✔✔Which of the following are functions of the auxiliary fuel burners in a
Black Liquor Recovery Boiler:
1. Stabilize conditions during upsets in the black liquor feed
2. Produce extra steam
3. Burn out the char bed when shutting down
4. Maintain furnace temperatures
5. Sustain a stable ignition while establishing a char bed
6. Raise steam during startup
Leveling
chp 2 - correct answer ✔✔Vibrating grates serve to aid combustion by _______ out the bed of
burning biomass.
Intermittently
Chp 8 - correct answer ✔✔With On - Off boiler feed water control, water is supplied
_____________ to the boiler, either by fully opening or fully closing a valve in the feedwater
line.
, Water ( not steam)
Chp 8 - correct answer ✔✔The ______ ,used in the spray desuperheater, must be of the highest
quality since any solids carried over will cause deposits in superheater tubes and on turbine
blades.
Partial
Chp 8 - correct answer ✔✔The Gas Recirculation method is used to maintain the desired steam
temperature at ________ loads.
Downwards ...
Chp 8 - correct answer ✔✔At high loads when the steam temperature tends to go above the
desired value, the tilting burners are tilted ___________.
FW
Chp 8 - correct answer ✔✔The three-element feedwater control system overcomes the effects
of swell and shrinkage and also responds to _________ flow.
Outlet
Chp 8 - correct answer ✔✔A pressure controller maintains a constant furnace pressure in a
boiler, at all loads, by adjusting the position of the ______ dampers.
Feedback ( not proportional)
questions with complete solutions
1.2.3.5.6.
chp 2 - correct answer ✔✔Which of the following are functions of the auxiliary fuel burners in a
Black Liquor Recovery Boiler:
1. Stabilize conditions during upsets in the black liquor feed
2. Produce extra steam
3. Burn out the char bed when shutting down
4. Maintain furnace temperatures
5. Sustain a stable ignition while establishing a char bed
6. Raise steam during startup
Leveling
chp 2 - correct answer ✔✔Vibrating grates serve to aid combustion by _______ out the bed of
burning biomass.
Intermittently
Chp 8 - correct answer ✔✔With On - Off boiler feed water control, water is supplied
_____________ to the boiler, either by fully opening or fully closing a valve in the feedwater
line.
, Water ( not steam)
Chp 8 - correct answer ✔✔The ______ ,used in the spray desuperheater, must be of the highest
quality since any solids carried over will cause deposits in superheater tubes and on turbine
blades.
Partial
Chp 8 - correct answer ✔✔The Gas Recirculation method is used to maintain the desired steam
temperature at ________ loads.
Downwards ...
Chp 8 - correct answer ✔✔At high loads when the steam temperature tends to go above the
desired value, the tilting burners are tilted ___________.
FW
Chp 8 - correct answer ✔✔The three-element feedwater control system overcomes the effects
of swell and shrinkage and also responds to _________ flow.
Outlet
Chp 8 - correct answer ✔✔A pressure controller maintains a constant furnace pressure in a
boiler, at all loads, by adjusting the position of the ______ dampers.
Feedback ( not proportional)
