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STATIONARY ENGINEER QUESTIONS WITH 100% CORRECT ANSWER
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STATIONARY ENGINEER QUESTIONS WITH 100% CORRECT ANSWER STATIONARY ENGINEER QUESTIONS WITH 100% CORRECT ANSWER
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STATIONARY ENGINEER 2024-2025QUESTIONS WITH 100% CORRECT ANSWER
How much clearance from the top of the boiler is needed for a HP boiler that produces
70000 lbs of steam? - CORRECT ANSWER 7 feet
On a gas fired boiler what is the proper gas to air mixture - CORRECT ANSWER
30%-70% and in special arrangements it can be as high as 100% . ANSWER CHAPTER
11 remember%
What is the total hardness in a system that was found to have calcium hardness of
60ppm and magnesium hardness of 18ppm and carbon hardness of 12 ppm? -
CORRECT ANSWER TH=(Ca x 2.5) + (Mg x 4.1)\nTH=(60 x 2.5) + (18 x 4.1)\nTH=
150+73.8 =( 223.8 PPM)
How often should a complete external inspection of the boiler be done? - CORRECT
ANSWER Once a Shift
With 24 hr operation how often do you check the water level? - CORRECT ANSWER
Once per shift
How often do you check the LWCO? - CORRECT ANSWER Once per shift
How often do you check the High Limit Switch? - CORRECT ANSWER Annually
A 2" pipe was found to be delivering water at 100 psia at 1040ft per second. How many
gallons per hour will it deliver? - CORRECT ANSWER GPM= V (diameter squared)
divided by .4085 ANSWER pg 469 BOG
,STATIONARY ENGINEER 2024-2025
QUESTIONS WITH 100% CORRECT ANSWER
What controls the amount of blowback on a safety valve? - CORRECT ANSWER
Blowback ring or adjusting ring
On a open air expansion tank hot water boiler system; how high should it be mounted? -
CORRECT ANSWER (4 Feet ) above the highest heating element.
What is the minimum top clearance of boilers with manholes? - CORRECT ANSWER
5 feet
Package boilers; steam heating boilers and hot water heating boilers shall have a
minimum clearance of? - CORRECT ANSWER 2 feet from ceiling. Code chapter 10
page76
Most important safety device on a boiler? - CORRECT ANSWER Safety relief valve
What does a Black Liquor Boiler do? - CORRECT ANSWER Black Liquor is the by
product of wood pulp processing in the paper making industry.
What does Black liquor boiler known for? - CORRECT ANSWER Steam generation
and recovery of soda ash
Maximum line voltage for control on a boiler? - CORRECT ANSWER 150 volts
,STATIONARY ENGINEER 2024-2025
QUESTIONS WITH 100% CORRECT ANSWER
Under what code are boilers designed and constructed? - CORRECT ANSWER ASME-
CSD 1
How many low water cut offs are needed per code for a hot water system when a boiler
has inputs greater than 400,000 btu per hr - CORRECT ANSWER 1 LWCO is needed.
What is the minimum and maximum size for a safety valve per code for boilers? -
CORRECT ANSWER Minimum 3/4" and Maximum 4 1/2"
What stamp is put on a boiler after repairs? - CORRECT ANSWER "R"
What is the equalizing system used for? - CORRECT ANSWER The equalizing system
is for warming up the steam lead.
A blowdown valve is located at the lowest water space of a boiler for three purposes -
CORRECT ANSWER 1. to remove precipitated sludge or loose scale \n2. To permit
rapid lowering of 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 regulators were not used? - CORRECT
ANSWER Electronic
After opening a boiler for repairs how much oxygen is needed? - CORRECT ANSWER
19%
, STATIONARY ENGINEER 2024-2025
QUESTIONS WITH 100% CORRECT ANSWER
What is the first thing you do when shutting down a boiler? - CORRECT ANSWER
Turn off (extinguish fire)
What is the legal limit of acceptable asbestos particles ? - CORRECT ANSWER 0.1
fibers per cubic centimeter
What is CREEP? - CORRECT ANSWER 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? - CORRECT ANSWER 14000 btu/lb
What substance transfers electrical current in a photocell? - CORRECT ANSWER
Electricity will flow when the CADMIUM is exposed to sufficient light.
What device acts as a check valve in both directions and keeps pumps primed? -
CORRECT ANSWER FOOT VALVES are used for pumps under suction pressure to
prevent backflow primed? on the suction line.
What protects boilers from explosion in the furnace? - CORRECT ANSWER 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).
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