Power Engineering 3B1 Chapter 8 Questions
and Answers| Latest Update
1. 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
a. steam
b. metal
c. water
d. internals Correct Ans-c
2. The Gas Recirculation method is used to maintain the desired steam temperature at
________ loads.
a. high
b. partial
c. over
d. no Correct Ans-b
3. Gas bypass method involves the separation of the convection section of the boiler into
two, or more, _________ gas passes.
a. reverse
b. crossing
c. parallel
d. counter Correct Ans-c
4. At high loads when the steam temperature tends to go above the desired value, the
tilting burners are tilted ___________.
a. downwards
b. upwards
c. tangents
d. sideways Correct Ans-a
5. At low loads when the steam temperature drops, the tilting burners are tilted
_________.
a. downwards
, b. upwards
c. tangents
d. sideways Correct Ans-b
6. Programming controls:
a. Function during operation
b. Function during start up and shut down
c. Function during start up
d. Function during shut down
e. Function during emergency situations Correct Ans-b
7. On a semi-automatic boiler the programming controls are activated by:
a. Pressure
b. The operator
c. Temperature
d. W ater level
e. Temperature and pressure Correct Ans-b
8. Purging a furnace means:
a. Ensuring the furnace is pressurized with air
b. Ensuring air is flowing through the furnace
c. Ensuring fuel is entering the furnace
d. Causing air to flow for no more than five seconds
e. Ensuring the air flow to the furnace has stopped Correct Ans-b
9. Pilot gas valve and ignition transformer should be energized:
a. Before pre purge
b. During post purge
c. After pre purge
d. On program start
e. after the pilot burner is lit Correct Ans-c
10. A small automatic oil-fired boiler may light:
1. From an interrupted pilot
2. Directly from the igniter
and Answers| Latest Update
1. 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
a. steam
b. metal
c. water
d. internals Correct Ans-c
2. The Gas Recirculation method is used to maintain the desired steam temperature at
________ loads.
a. high
b. partial
c. over
d. no Correct Ans-b
3. Gas bypass method involves the separation of the convection section of the boiler into
two, or more, _________ gas passes.
a. reverse
b. crossing
c. parallel
d. counter Correct Ans-c
4. At high loads when the steam temperature tends to go above the desired value, the
tilting burners are tilted ___________.
a. downwards
b. upwards
c. tangents
d. sideways Correct Ans-a
5. At low loads when the steam temperature drops, the tilting burners are tilted
_________.
a. downwards
, b. upwards
c. tangents
d. sideways Correct Ans-b
6. Programming controls:
a. Function during operation
b. Function during start up and shut down
c. Function during start up
d. Function during shut down
e. Function during emergency situations Correct Ans-b
7. On a semi-automatic boiler the programming controls are activated by:
a. Pressure
b. The operator
c. Temperature
d. W ater level
e. Temperature and pressure Correct Ans-b
8. Purging a furnace means:
a. Ensuring the furnace is pressurized with air
b. Ensuring air is flowing through the furnace
c. Ensuring fuel is entering the furnace
d. Causing air to flow for no more than five seconds
e. Ensuring the air flow to the furnace has stopped Correct Ans-b
9. Pilot gas valve and ignition transformer should be energized:
a. Before pre purge
b. During post purge
c. After pre purge
d. On program start
e. after the pilot burner is lit Correct Ans-c
10. A small automatic oil-fired boiler may light:
1. From an interrupted pilot
2. Directly from the igniter
