1|Page
DC Third Class Stationary Boilers (323) Verified Exam
ACTUAL EXAM COMPLETE QUESTIONS AND
CORRECT ANSWERS LATEST EXAM!!!
Where is high temperature vapor found? - Answer-At the
discharge of the compressor or condenser
What stays are used to support the burner chamber in a
scotch marine boiler? - Answer-Diagonal Stays
What type of safety valve is this? - Answer-( Full) Crosby
nozzle-type safety valve. Page 365 BOG
What type of safety valve is this? - Answer-( Full) Crosby
nozzle-type safety valve. Page 365 BOG
Where do you found superheat reading? - Answer-Take
suction line pressure
Cross reference using a P/T Chart
Get tail coil Temperature
Subtract cross references temperature from tail coil
temperature
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Result will be superheat
Name the wire that connects all component of a system to
a physical ground or water pipe? - Answer-Grounding
Electrode Conductor
Where do get sub-cooling reading? - Answer-Take liquid
line pressure
Cross reference to temperature using a P/T Chart
Get liquid line temperature
Subtract actual temperature from cross referenced
temperature
Result is sub-cooling
On the boilers that have both Quick opening and Screw
type blow down valves, the Quick opening valve must be
located? - Answer-Closest to the boiler and followed by
the screw type valve
High pressure boilers equipped with Quick opening and
Screw type valves are blown down how? - Answer-By
opening the Quick opening valve first and closing it Last.
Page 403 BOG
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ASME Code defines a slow opening valve as what? -
Answer-One requiring at least 5 full 360 degree turns
between full open and close position. Page 374
A 300 Horsepower boiler operating at 100psi has an
average load of 75% with 80% condensate return and 5%
blow down. The treatment provides a chemical which
costs $8.75 per gallon, and will treat 600 gallon. Find the
amount of the chemical needed for the day period, and the
cost of the chemical for a 30 days period? - Answer-Water
In = Water Out
Makeup + Condensate Return = Evaporator + Blow Down
Average Evaporator Rate = 300 x 34.5 pph x .75% load =
7762, 50 pph
1 Month + .8( 7762.50 pph) = 7762.50 pph + 0500 m
1 Month + 6210 pph = 7762.50 pph + .0500 m
-6210 -6210
1 Month = 1552.5 pph + .0500
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.9500 m = 1552.5 pph
.9500m .9500
1Month = 1,634.21 pph
Gallons per Month = 1634..33 x 24 x 30 = 141,
252.24 gallons per month
Chemical needed = 141,252.24 gallon / 600 gallon = 235,
40 gallon
Cost per month = 235, 40 gallon x 8.75 = $2,059.75
During a 24 hours operation how often should you check
the water level? - Answer-Once per shift
The component in which liquid vapor by absorbing heat is
called? - Answer-Evaporator
Select the best answer electrical grounding method? -
Answer-Metal stake drive 8 foot into the ground.
DC Third Class Stationary Boilers (323) Verified Exam
ACTUAL EXAM COMPLETE QUESTIONS AND
CORRECT ANSWERS LATEST EXAM!!!
Where is high temperature vapor found? - Answer-At the
discharge of the compressor or condenser
What stays are used to support the burner chamber in a
scotch marine boiler? - Answer-Diagonal Stays
What type of safety valve is this? - Answer-( Full) Crosby
nozzle-type safety valve. Page 365 BOG
What type of safety valve is this? - Answer-( Full) Crosby
nozzle-type safety valve. Page 365 BOG
Where do you found superheat reading? - Answer-Take
suction line pressure
Cross reference using a P/T Chart
Get tail coil Temperature
Subtract cross references temperature from tail coil
temperature
,2|Page
Result will be superheat
Name the wire that connects all component of a system to
a physical ground or water pipe? - Answer-Grounding
Electrode Conductor
Where do get sub-cooling reading? - Answer-Take liquid
line pressure
Cross reference to temperature using a P/T Chart
Get liquid line temperature
Subtract actual temperature from cross referenced
temperature
Result is sub-cooling
On the boilers that have both Quick opening and Screw
type blow down valves, the Quick opening valve must be
located? - Answer-Closest to the boiler and followed by
the screw type valve
High pressure boilers equipped with Quick opening and
Screw type valves are blown down how? - Answer-By
opening the Quick opening valve first and closing it Last.
Page 403 BOG
,3|Page
ASME Code defines a slow opening valve as what? -
Answer-One requiring at least 5 full 360 degree turns
between full open and close position. Page 374
A 300 Horsepower boiler operating at 100psi has an
average load of 75% with 80% condensate return and 5%
blow down. The treatment provides a chemical which
costs $8.75 per gallon, and will treat 600 gallon. Find the
amount of the chemical needed for the day period, and the
cost of the chemical for a 30 days period? - Answer-Water
In = Water Out
Makeup + Condensate Return = Evaporator + Blow Down
Average Evaporator Rate = 300 x 34.5 pph x .75% load =
7762, 50 pph
1 Month + .8( 7762.50 pph) = 7762.50 pph + 0500 m
1 Month + 6210 pph = 7762.50 pph + .0500 m
-6210 -6210
1 Month = 1552.5 pph + .0500
, 4|Page
.9500 m = 1552.5 pph
.9500m .9500
1Month = 1,634.21 pph
Gallons per Month = 1634..33 x 24 x 30 = 141,
252.24 gallons per month
Chemical needed = 141,252.24 gallon / 600 gallon = 235,
40 gallon
Cost per month = 235, 40 gallon x 8.75 = $2,059.75
During a 24 hours operation how often should you check
the water level? - Answer-Once per shift
The component in which liquid vapor by absorbing heat is
called? - Answer-Evaporator
Select the best answer electrical grounding method? -
Answer-Metal stake drive 8 foot into the ground.
