the flame sensor is sensitive to ___
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infrared, visible, or ultraviolet light
air used to atomize fuel oil is ___ air
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primary
The air-fuel ratio can be maintained by ___
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an air damper, butterfly valve, or modulating motor and linkage
A steam trap usually has a _____ installed on the inlet line.
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Steam strainer
Fuel oil with a low flash point would be ___
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dangerous to use
opacity smoke indicator alarms can be used to ___ in the gases of combustion
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Indicate an unexpected amount of particulate matter
A solenoid valve is a direct-acting valve in the gas system used ___
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, as an automatic gas shutoff valve
___ is biological material used as a renewable energy fuel
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Biomass
The flow of steam maintained through a super heater should never be less than _____%
of boiler capacity.
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25
nonlinear flow means that the percent a valve or damper is open does not necessarily
correspond to ___
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percent of flow
An economizer uses the heat energy from the gases of combustion leaving the boiler
to heat the _____.
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, feed water
One reason to perform a bottom blowdown is to ___
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remove sludge from the bottom of the boiler
Deposits of calcium and magnesium carbonates on the boiler surface cause ___
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scale
___ efficiency is the ratio of the heat absorbed by the boiler (output) to the heat
available in the fuel (input).
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Thermal
Air supplied to the burner that is more than the theoretical amount needed to burn a
fuel is ___ air
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Give this one a try later!
infrared, visible, or ultraviolet light
air used to atomize fuel oil is ___ air
Give this one a try later!
primary
The air-fuel ratio can be maintained by ___
,Give this one a try later!
an air damper, butterfly valve, or modulating motor and linkage
A steam trap usually has a _____ installed on the inlet line.
Give this one a try later!
Steam strainer
Fuel oil with a low flash point would be ___
Give this one a try later!
dangerous to use
opacity smoke indicator alarms can be used to ___ in the gases of combustion
Give this one a try later!
Indicate an unexpected amount of particulate matter
A solenoid valve is a direct-acting valve in the gas system used ___
Give this one a try later!
, as an automatic gas shutoff valve
___ is biological material used as a renewable energy fuel
Give this one a try later!
Biomass
The flow of steam maintained through a super heater should never be less than _____%
of boiler capacity.
Give this one a try later!
25
nonlinear flow means that the percent a valve or damper is open does not necessarily
correspond to ___
Give this one a try later!
percent of flow
An economizer uses the heat energy from the gases of combustion leaving the boiler
to heat the _____.
Give this one a try later!
, feed water
One reason to perform a bottom blowdown is to ___
Give this one a try later!
remove sludge from the bottom of the boiler
Deposits of calcium and magnesium carbonates on the boiler surface cause ___
Give this one a try later!
scale
___ efficiency is the ratio of the heat absorbed by the boiler (output) to the heat
available in the fuel (input).
Give this one a try later!
Thermal
Air supplied to the burner that is more than the theoretical amount needed to burn a
fuel is ___ air
Give this one a try later!
