Seattle boiler exam study guide Questions
with 100% Correct Detailed Verified
Answers latest update 2025
Surface tension on the water in the steam and water drum is
increased by ___. --- correct answers ---impurities that float on the
surface of the water
To protect sewer lines from the high temperature and high pressure
coming from the boiler blowdown lines, ___. --- correct answers ---
blowdown tanks are used
A boiler generating 20,000 lb of steam/hr must be supplied with at
least ___. --- correct answers ---20,000 lb of water/hr
Oxygen and other noncondensable gases are separated form the
feedwater ___. --- correct answers ---in the open deaerator feedwater
heater
The four systems required to operate a steam boiler are ___. ---
correct answers ---steam, feedwater, fuel, and draft
,In order to produce one pound of steam, it is necessary to evaporate
___. --- correct answers ---one lb of water
Steam that has lost its heat and has turned back into water is ___. ---
correct answers ---condensate
Steam is extracted from the turbine after it has passed through some
of the turbine stages to ___ --- correct answers ---be used for process
work and heating
Water from an open deaerating feedwater heater flows ___. ---
correct answers ---to the feedwater pump
A safe and efficient boiler plant should include ___ pump(s). ---
correct answers ---one steam and one electric feedwater
A surface condenser has water ___. --- correct answers ---passed
through tubes to cause steam to condense, causing a vacuum
,On the feedwater line near the boiler is a check valve and a stop valve.
The valve closest to the shell of the boiler is the ___ valve. --- correct
answers ---stop
On a boiler burning low pressure gas, the volume (amount) of gas
burned is controlled by the ___. --- correct answers ---volume of air
passing through the venturi tube
On the fuel oil system, the purpose of the duplex strainers on the
suction line between the tank and fuel oil pump is to ___. --- correct
answers ---allow one strainer to be cleaned without securing the
boiler
A draft fan located between the boiler and chimney is used in a(n) ___
draft system. --- correct answers ---induced
When steam is superheated it has ___. --- correct answers ---more
heat energy, thus producing more work
The vacuum on the exhaust side of the turbine ___. --- correct
answers ---reduces back pressure and steam flow rate
, The open feedwater heater is located ___. --- correct answers ---above
the feedwater pump(s)
No. ___ fuel oil must be heater in order to be pumped. --- correct
answers ---6
Coal stokers were developed because ___. --- correct answers ---hand
firing was inefficient in larger-sized boilers
Pulverized coal has the consistency of talcum powder so that it ___. ---
correct answers ---can come in closer contact with the oxygen for
complete combustion
Draft is defined as a difference in pressure that causes ___. --- correct
answers ---air or gases to flow
Air is mixed inside of the burner register in a(n) ___ gas system. ---
correct answers ---high pressure
Natural draft is produced by a(n) ___. --- correct answers ---
difference in temperature of a column of gas inside the chimney from
a column of air outside the chimney
with 100% Correct Detailed Verified
Answers latest update 2025
Surface tension on the water in the steam and water drum is
increased by ___. --- correct answers ---impurities that float on the
surface of the water
To protect sewer lines from the high temperature and high pressure
coming from the boiler blowdown lines, ___. --- correct answers ---
blowdown tanks are used
A boiler generating 20,000 lb of steam/hr must be supplied with at
least ___. --- correct answers ---20,000 lb of water/hr
Oxygen and other noncondensable gases are separated form the
feedwater ___. --- correct answers ---in the open deaerator feedwater
heater
The four systems required to operate a steam boiler are ___. ---
correct answers ---steam, feedwater, fuel, and draft
,In order to produce one pound of steam, it is necessary to evaporate
___. --- correct answers ---one lb of water
Steam that has lost its heat and has turned back into water is ___. ---
correct answers ---condensate
Steam is extracted from the turbine after it has passed through some
of the turbine stages to ___ --- correct answers ---be used for process
work and heating
Water from an open deaerating feedwater heater flows ___. ---
correct answers ---to the feedwater pump
A safe and efficient boiler plant should include ___ pump(s). ---
correct answers ---one steam and one electric feedwater
A surface condenser has water ___. --- correct answers ---passed
through tubes to cause steam to condense, causing a vacuum
,On the feedwater line near the boiler is a check valve and a stop valve.
The valve closest to the shell of the boiler is the ___ valve. --- correct
answers ---stop
On a boiler burning low pressure gas, the volume (amount) of gas
burned is controlled by the ___. --- correct answers ---volume of air
passing through the venturi tube
On the fuel oil system, the purpose of the duplex strainers on the
suction line between the tank and fuel oil pump is to ___. --- correct
answers ---allow one strainer to be cleaned without securing the
boiler
A draft fan located between the boiler and chimney is used in a(n) ___
draft system. --- correct answers ---induced
When steam is superheated it has ___. --- correct answers ---more
heat energy, thus producing more work
The vacuum on the exhaust side of the turbine ___. --- correct
answers ---reduces back pressure and steam flow rate
, The open feedwater heater is located ___. --- correct answers ---above
the feedwater pump(s)
No. ___ fuel oil must be heater in order to be pumped. --- correct
answers ---6
Coal stokers were developed because ___. --- correct answers ---hand
firing was inefficient in larger-sized boilers
Pulverized coal has the consistency of talcum powder so that it ___. ---
correct answers ---can come in closer contact with the oxygen for
complete combustion
Draft is defined as a difference in pressure that causes ___. --- correct
answers ---air or gases to flow
Air is mixed inside of the burner register in a(n) ___ gas system. ---
correct answers ---high pressure
Natural draft is produced by a(n) ___. --- correct answers ---
difference in temperature of a column of gas inside the chimney from
a column of air outside the chimney
