P99 LOW PRESSURE BOILERS,
FUEL SYSTEM EXAM QUESTIONS
AND THEIR EXPECTED ANSWERS
When burning No.6 fuel oil, the strainers should
be cleaned at least once every _____ hours.
24
When cleaning a fuel oil strainer, the ____ must
be carefully replaced to prevent air from entering
the system.
gasket
The ____ pump draws fuel oil from the fuel oil
tank.
fuel oil
The _____ valve protects the fuel lines and pump
from excessive pressure.
relief
A high vacuum on fuel oil suction gauge
normally indicates ________ .
cold fuel or a dirty strainer
Fuel oil burners are designed to provide fuel oil
to the furnace in a ______ .
fine spray
The rotary cup burner uses ______ to atomize
the fuel oil.
a spinning cup and high velocity air
, In a low pressure gas burner, gas is mixed with
air in the ____________ .
mixing chamber before the burner register
In a high pressure gas burner, the gas mixes
with the air on the inside of the ________ .
burner
A ____ is a narrowed portion of the tube.
venturi
On a low pressure gas system, the manual reset
cannot be opened until the _________ .
pilot is lit
________ coal is a hard coal.
Anthracite
In a high pressure gas system, the plant
pressure ________ valve reduces gas pressure
to the line pressure used in the system.
regulating
_______ coal is coal that is ground to a fine
powder.
Pulverized
A _______ is a mechanical device for feeding
coal consistently to the burner.
stoker
A(n) _______ is an air pressure-activated switch
that closes after proving sufficient pressure of
combination air from the forced draft fan.
air proving switch
FUEL SYSTEM EXAM QUESTIONS
AND THEIR EXPECTED ANSWERS
When burning No.6 fuel oil, the strainers should
be cleaned at least once every _____ hours.
24
When cleaning a fuel oil strainer, the ____ must
be carefully replaced to prevent air from entering
the system.
gasket
The ____ pump draws fuel oil from the fuel oil
tank.
fuel oil
The _____ valve protects the fuel lines and pump
from excessive pressure.
relief
A high vacuum on fuel oil suction gauge
normally indicates ________ .
cold fuel or a dirty strainer
Fuel oil burners are designed to provide fuel oil
to the furnace in a ______ .
fine spray
The rotary cup burner uses ______ to atomize
the fuel oil.
a spinning cup and high velocity air
, In a low pressure gas burner, gas is mixed with
air in the ____________ .
mixing chamber before the burner register
In a high pressure gas burner, the gas mixes
with the air on the inside of the ________ .
burner
A ____ is a narrowed portion of the tube.
venturi
On a low pressure gas system, the manual reset
cannot be opened until the _________ .
pilot is lit
________ coal is a hard coal.
Anthracite
In a high pressure gas system, the plant
pressure ________ valve reduces gas pressure
to the line pressure used in the system.
regulating
_______ coal is coal that is ground to a fine
powder.
Pulverized
A _______ is a mechanical device for feeding
coal consistently to the burner.
stoker
A(n) _______ is an air pressure-activated switch
that closes after proving sufficient pressure of
combination air from the forced draft fan.
air proving switch
