COMPLETE QUESTIONS AND CORRECT DETTAILED
ANSWERS|| And Practice Tests Newest With Complete
Questions And Correct Detailed Answers| Brand New
Version!! Latest Update 2026-2027
ANSWERS: a
On a coal fired unit using a stoker and obtaining good combustion
efficiency we would probably use:
a. Steam flow-air flow control
b. Fuel flow-air flow control
c. Air flow-fuel flow control
d. Direct control
e. Positioning control
ANSWERS: c
By measuring and comparing the steam and the ________, it is possible to
obtain efficient combustion in a boiler by maintaining a proper steam to
airflow ratio.
a. feedwater
b. fuel
c. airflow
d. drum level
ANSWERS: a
In coal fed to the furnaces, the airflow is measured and maintained in a
predetermined ratio with the steam flow.
a. True
b. False
,ANSWERS: a
The furnace pressure controller will adjust the boiler ____ dampers to
keep the pressure constant at all boiler loads.
a. outlet
b. inlet
c. air
d. burner
ANSWERS: c
In a fuel flow - airflow combustion control system, the fuel and airflows
are measured directly and are converted to ______ signals by means of
square root extractors.
a. digital
b. parallel
c. proportional
d. output
ANSWERS: c
In a fuel flow - airflow combustion control system, the fuel flow signal
makes the final adjustment to the _.
a. feedwater
b. fuel
c. airflow
d. drum level
ANSWERS: a
When increasing the firing rate manually it is best to:
a. Increase air flow before fuel flow
b. Increase fuel flow before air flow
c. Increase air and fuel together
d. It really doesn't matter
e. Decrease fuel flow before increasing air flow
,ANSWERS: b
Before making adjustments or altering the fuel-air ratio of a combustion
control system, we would:
a. Measure fuel flow
b. Analyze flue gas
c. Increase air flow
d. Decrease firing rate
e. Measure steam flow
ANSWERS: c
When master controller output goes directly to a fuel valve and a
modulating relay we have:
a. Multi-element control
b. Air flow-fuel flow control
c. Fuel flow-air flow control
d. Steam flow-air flow control
e. Positioning Control
ANSWERS: b
In a airflow-fuel flow combustion control, airflow signal becomes the set
point of the __ controller.
a. feedwater
b. fuel
c. airflow
d. drum level
, ANSWERS: 1,2,4,6,8
LIst the main components of a multi-element combustion system:
1. hand/automatic transfer station
2. square root extractor
3. digital conditioner
4. low select signal relay
5. signal coupler
6. high select signal relay
7. local controller
8. master pressure controller
ANSWERS: a
An increase in boiler load will cause the airflow to increase first and the
increase in gas flow will follow.
a. True
b. False