Stationary Engineer Exam | Complete Practice Questions & Verified Answers | Boiler, Steam & HVAC Certification
How often should a complete external inspection of Once a Shift
the boiler be done?
With 24 hr operation how often do you check the water Once per shift
level?
How often do you check the LWCO? Once per shift
How often do you check the High Limit Switch? Annually
A 2" pipe was found to be delivering water at 100 psia at GPM= V (diameter squared) divided by .4085 ANSWER pg 469 BOG
1040ft per second. How many gallons per hour will it
deliver?
What controls the amount of blowback on a safety Blowback ring or adjusting ring
valve?
On a open air expansion tank hot water boiler system; (4 Feet ) above the highest heating element.
how high should it be mounted?
What is the minimum top clearance of boilers with 5 feet
manholes?
Package boilers; steam heating boilers and hot water 2 feet from ceiling. Code chapter 10 page76
heating boilers shall have a minimum clearance of?
Most important safety device on a boiler? Safety relief valve
What does a Black Liquor Boiler do? Black Liquor is the by product of wood pulp processing in the paper making
industry.
What does Black liquor boiler known for? Steam generation and recovery of soda ash
Maximum line voltage for control on a boiler? 150 volts
Under what code are boilers designed and ASME- CSD 1
constructed?
How many low water cut offs are needed per code for 1 LWCO is needed.
a hot water system when a boiler has inputs greater
than 400,000 btu per hr
What is the minimum and maximum size for a safety Minimum 3/4" and Maximum 4 1/2"
valve per code for boilers?
,Stationary Engineer Exam | Complete Practice Questions & Verified Answers | Boiler, Steam & HVAC Certification
What stamp is put on a boiler after repairs? "R"
What is the equalizing system used for? The equalizing system is for warming up the steam lead.
A blowdown valve is located at the lowest water space 1. to remove precipitated sludge or loose scale \n2. To permit rapid lowering of
of a boiler for three purposes the boiler water if it has become too high accidentally \n3. As a means of
removing water from the boiler so that fresh water may be added to keep the
concentration of solids below the point where difficulties may be experienced.
In the old power boiler which type of feed-water Electronic
regulators were not used?
After opening a boiler for repairs how much oxygen is 19%
needed?
What is the first thing you do when shutting down a Turn off (extinguish fire)
boiler?
What is the legal limit of acceptable asbestos particles 0.1 fibers per cubic centimeter
?
What is CREEP? Creep is defined as the slow deformation of material with time; with the
deformation taking place at elevated temperatures with no increase in stress.
What is the BTU content of Anthracite coal? 14000 btu/lb
What substance transfers electrical current in a Electricity will flow when the CADMIUM is exposed to sufficient light.
photocell?
What device acts as a check valve in both directions FOOT VALVES are used for pumps under suction pressure to prevent backflow
and keeps pumps primed? primed? on the suction line.
What protects boilers from explosion in the furnace? A flame guard system is an arrangement of flame detection system; interlocks;
and relays which will sense the presence of a proper flame in a furnace and
cause fuel to be shut off to the furnace if a hazardous condition develops
(improper flame or combustion).
,Stationary Engineer Exam | Complete Practice Questions & Verified Answers | Boiler, Steam & HVAC Certification
What size pipe is used as a header in a boiler operating 6 inches
at 100psi?
What device is used to measure flue gasses The Orsat Analyzer
Which low water cut off does not have a mercury The Submerged electrode type
switch?
What is the btu output per lb of #4 fuel oil? 18
What substance is used for the electric transmission in Platinum is used because of its stability at high temperatures
an RTD?
How much air is needed for the combustion of 50% for coal and 10-30% for gas & oil
pulverized coal; gas; oil?
In old power boilers which type of feedwater ANSWER D electronic/electro-magnetic
regulators were not used? \n(A) hydraulic \n(B) float
\n(C) thermostatic expansion \n(D) electronic
What is hard forming scale? Silica
With hydroxide present and normal oxygen levels Chlorine
which chemical will cause problems?
The result from steel manufacturing and under pressure A buldge is caused by overheating of the shell plates and it affects the entire
in boilers tends to cause buldging? A buldge is caused thickness of the plate.
by ?
A blister is caused by what ? Slag inclusion forming a lamination at the time the plate was rolled at the steel
mill. A blister is a separation of the metal from the shell plate caused by
impurities rolled into the shell plate when formed.
With normal oxygen and low alkalinity. what is added to Neutralizing Amines
the boiler water?
Which chemical is used to combat scale? Combined phosphate treatment- sodium phosphate
Other than sulfite what chemical is used to combat Hydrazine
corrosion in boilers?
What will neutralize acid? Alkali and Lime Soda
What mechanical device is used to remove scale from A tube rattler or vibrator
firetubes?
,Stationary Engineer Exam | Complete Practice Questions & Verified Answers | Boiler, Steam & HVAC Certification
What percentage of the pressure should a boiler have 75%
before you test the lever of a safety valve?
Where is internal corrosion most likely to occur on a Water leg-Mud leg
vertical tube boiler?
What are the minimum and maximum sizes permitted 3/4"minimum 2 ½ " maximum
for blow down valves or connections?
A boiler operating at a pressure of 65lbs. What is the ½ " feed ¾ " blow off
smallest size feed and blow off connections if the
safety valve is set at 90 psi?
How often should water columns and water glass levels (Once A Shift)\nAt the beginning of each shift - beginning of the work effort
be checked on a high pressure boiler?
What takes no actual action chemical part in Nitrogen
combustion?
How many ppm of EDTA are needed to tie up 1ppm of EDTA requires 10ppm of EDTA and 5 NTA to tie up each 1ppm hardness.
hardness?
On a package boiler; how many ways could cause fire 6 ways 1-poor starting draft 2-incorrect firebox 3-wrong burner nozzle 4-lean
puffs when it is started up? fire 5- insufficient gas pilot or excessive gas pilot 6-water in the oil
What is the grade of light domestic fuel oil ? Grade 1 ( Number 1 )
How often should you test the operating control? Annually
How often should the testing and inspecting of the Annually
burner component?
A lead sulfite photocell is what type of flame sensor? Infrared light sensing
What is the least amount of oxygen needed when a 19%
nitrogen blanket is used?
How should a boiler be prepared for inspection? Extinguish fire and allow boiler to cool slowly. Open the blow down and the
drain; vent the boiler to the atmosphere Soot and ashes should be removed
from all tubes; shell plates; heads; seams and every accessible external surface.
The blow down should be shut if any other boiler feeds this line. Manhole -
handhole plates and inspection plugs should be removed. All loose deposits of
sludge or sediment should be washed out. The blow down should only be
opened when it is certain that there is no pressure in the line and no one is
inside the boiler. Any scale or oil deposits should be left for the water
treatment specialist to see for analysis. A boiler properly prepared for
inspection should be cool; dry and clean. It is advisable to attach a red tag
marked "person in boiler" to the steam; blowdown; feed and fuel valves and
also to the manhole plate whenever someone is inside a boiler.
What function can a boiler operator contribute to boiler A) maintain a safe reliable plant B) maintenance and efficient plant C)
maintenance? Inspection and logging of items that need to be corrected during the next
maintenance period
How often should a complete external inspection of Once a Shift
the boiler be done?
With 24 hr operation how often do you check the water Once per shift
level?
How often do you check the LWCO? Once per shift
How often do you check the High Limit Switch? Annually
A 2" pipe was found to be delivering water at 100 psia at GPM= V (diameter squared) divided by .4085 ANSWER pg 469 BOG
1040ft per second. How many gallons per hour will it
deliver?
What controls the amount of blowback on a safety Blowback ring or adjusting ring
valve?
On a open air expansion tank hot water boiler system; (4 Feet ) above the highest heating element.
how high should it be mounted?
What is the minimum top clearance of boilers with 5 feet
manholes?
Package boilers; steam heating boilers and hot water 2 feet from ceiling. Code chapter 10 page76
heating boilers shall have a minimum clearance of?
Most important safety device on a boiler? Safety relief valve
What does a Black Liquor Boiler do? Black Liquor is the by product of wood pulp processing in the paper making
industry.
What does Black liquor boiler known for? Steam generation and recovery of soda ash
Maximum line voltage for control on a boiler? 150 volts
Under what code are boilers designed and ASME- CSD 1
constructed?
How many low water cut offs are needed per code for 1 LWCO is needed.
a hot water system when a boiler has inputs greater
than 400,000 btu per hr
What is the minimum and maximum size for a safety Minimum 3/4" and Maximum 4 1/2"
valve per code for boilers?
,Stationary Engineer Exam | Complete Practice Questions & Verified Answers | Boiler, Steam & HVAC Certification
What stamp is put on a boiler after repairs? "R"
What is the equalizing system used for? The equalizing system is for warming up the steam lead.
A blowdown valve is located at the lowest water space 1. to remove precipitated sludge or loose scale \n2. To permit rapid lowering of
of a boiler for three purposes the boiler water if it has become too high accidentally \n3. As a means of
removing water from the boiler so that fresh water may be added to keep the
concentration of solids below the point where difficulties may be experienced.
In the old power boiler which type of feed-water Electronic
regulators were not used?
After opening a boiler for repairs how much oxygen is 19%
needed?
What is the first thing you do when shutting down a Turn off (extinguish fire)
boiler?
What is the legal limit of acceptable asbestos particles 0.1 fibers per cubic centimeter
?
What is CREEP? Creep is defined as the slow deformation of material with time; with the
deformation taking place at elevated temperatures with no increase in stress.
What is the BTU content of Anthracite coal? 14000 btu/lb
What substance transfers electrical current in a Electricity will flow when the CADMIUM is exposed to sufficient light.
photocell?
What device acts as a check valve in both directions FOOT VALVES are used for pumps under suction pressure to prevent backflow
and keeps pumps primed? primed? on the suction line.
What protects boilers from explosion in the furnace? A flame guard system is an arrangement of flame detection system; interlocks;
and relays which will sense the presence of a proper flame in a furnace and
cause fuel to be shut off to the furnace if a hazardous condition develops
(improper flame or combustion).
,Stationary Engineer Exam | Complete Practice Questions & Verified Answers | Boiler, Steam & HVAC Certification
What size pipe is used as a header in a boiler operating 6 inches
at 100psi?
What device is used to measure flue gasses The Orsat Analyzer
Which low water cut off does not have a mercury The Submerged electrode type
switch?
What is the btu output per lb of #4 fuel oil? 18
What substance is used for the electric transmission in Platinum is used because of its stability at high temperatures
an RTD?
How much air is needed for the combustion of 50% for coal and 10-30% for gas & oil
pulverized coal; gas; oil?
In old power boilers which type of feedwater ANSWER D electronic/electro-magnetic
regulators were not used? \n(A) hydraulic \n(B) float
\n(C) thermostatic expansion \n(D) electronic
What is hard forming scale? Silica
With hydroxide present and normal oxygen levels Chlorine
which chemical will cause problems?
The result from steel manufacturing and under pressure A buldge is caused by overheating of the shell plates and it affects the entire
in boilers tends to cause buldging? A buldge is caused thickness of the plate.
by ?
A blister is caused by what ? Slag inclusion forming a lamination at the time the plate was rolled at the steel
mill. A blister is a separation of the metal from the shell plate caused by
impurities rolled into the shell plate when formed.
With normal oxygen and low alkalinity. what is added to Neutralizing Amines
the boiler water?
Which chemical is used to combat scale? Combined phosphate treatment- sodium phosphate
Other than sulfite what chemical is used to combat Hydrazine
corrosion in boilers?
What will neutralize acid? Alkali and Lime Soda
What mechanical device is used to remove scale from A tube rattler or vibrator
firetubes?
,Stationary Engineer Exam | Complete Practice Questions & Verified Answers | Boiler, Steam & HVAC Certification
What percentage of the pressure should a boiler have 75%
before you test the lever of a safety valve?
Where is internal corrosion most likely to occur on a Water leg-Mud leg
vertical tube boiler?
What are the minimum and maximum sizes permitted 3/4"minimum 2 ½ " maximum
for blow down valves or connections?
A boiler operating at a pressure of 65lbs. What is the ½ " feed ¾ " blow off
smallest size feed and blow off connections if the
safety valve is set at 90 psi?
How often should water columns and water glass levels (Once A Shift)\nAt the beginning of each shift - beginning of the work effort
be checked on a high pressure boiler?
What takes no actual action chemical part in Nitrogen
combustion?
How many ppm of EDTA are needed to tie up 1ppm of EDTA requires 10ppm of EDTA and 5 NTA to tie up each 1ppm hardness.
hardness?
On a package boiler; how many ways could cause fire 6 ways 1-poor starting draft 2-incorrect firebox 3-wrong burner nozzle 4-lean
puffs when it is started up? fire 5- insufficient gas pilot or excessive gas pilot 6-water in the oil
What is the grade of light domestic fuel oil ? Grade 1 ( Number 1 )
How often should you test the operating control? Annually
How often should the testing and inspecting of the Annually
burner component?
A lead sulfite photocell is what type of flame sensor? Infrared light sensing
What is the least amount of oxygen needed when a 19%
nitrogen blanket is used?
How should a boiler be prepared for inspection? Extinguish fire and allow boiler to cool slowly. Open the blow down and the
drain; vent the boiler to the atmosphere Soot and ashes should be removed
from all tubes; shell plates; heads; seams and every accessible external surface.
The blow down should be shut if any other boiler feeds this line. Manhole -
handhole plates and inspection plugs should be removed. All loose deposits of
sludge or sediment should be washed out. The blow down should only be
opened when it is certain that there is no pressure in the line and no one is
inside the boiler. Any scale or oil deposits should be left for the water
treatment specialist to see for analysis. A boiler properly prepared for
inspection should be cool; dry and clean. It is advisable to attach a red tag
marked "person in boiler" to the steam; blowdown; feed and fuel valves and
also to the manhole plate whenever someone is inside a boiler.
What function can a boiler operator contribute to boiler A) maintain a safe reliable plant B) maintenance and efficient plant C)
maintenance? Inspection and logging of items that need to be corrected during the next
maintenance period
