STATIONARY ENGINEER EOC EXAM 2 QUESTIONS AND
SOLUTIONS 2025/2026 GRADED A+
✔✔What is protecting the boiler steam pressure gauge from high temperatures? -
✔✔The siphon
✔✔How are superheaters being prevented from overheating? - ✔✔Steam circulation
✔✔As steam pressure in a boiler increases, there is a corresponding increase in what?
- ✔✔Temperature
✔✔What must boilers operating at 100 psi or over have? - ✔✔Two bottom blowdown
valves
✔✔Boilers battery equipped with manhole openings must have what? - ✔✔Two main
steam stop valves
✔✔The boiler operator should first check what when taking over a shift? - ✔✔The boiler
water level and blowdown the water column and gauge glass.
✔✔This boiler was developed to provide steam at higher pressures. - ✔✔Watertube
boiler
✔✔Where is the mud drum located? - ✔✔At the lowest part of the water side of a
watertube boiler.
✔✔How often should boilers be inspected internally and externally? - ✔✔Every year
✔✔What is a boiler? - ✔✔A closed vessel used for heating water or generating steam
by direct application of heat from combustible fuels or electricity
✔✔What is a high pressure boiler? - ✔✔Power Boiler-S
Above 15 psi steam
Above 250°F water
Above 160 psi water
✔✔What is a low pressure boiler? - ✔✔Heating boiler-H
Up to 15 psi steam
Up to 250°F water
Up to 160 psi water
✔✔What are the following BTUH limitations? - ✔✔B.O.P. = 1,676,000 output
, 1st Grade = No Limit
2nd Grade = 8,380,000
3rd Grade = 3,352,000
✔✔What is saturated steam? - ✔✔Saturated with heat. Has a temperature that
corresponds to the pressure that it was generated from.
✔✔Define boiler horsepower - ✔✔The evaporation of 34.5 pounds of water per hour at
the feedwater temperature of 212°F by adding 970.4 BTUs of latent heat per pound of
water.
✔✔Name the five positions of the boiler code and licensing board. - ✔✔E-1
Professional engineer
I-2 Installer of Boilers
O-3 Boiler Operator (1st Grade 10+ yrs)
U-4 User of Boilers
C-5 Chief Boiler Inspector (Jim Harrison)
✔✔What are the four basic boiler systems? - ✔✔Fuel System
Draft System
Feedwater System
Steam System
✔✔What is a "pork chop?" - ✔✔Nickname for a cast-iron sectional
✔✔What is the breaching? - ✔✔It is the connection between the boiler and the chimney
or stack
✔✔What is condensate? - ✔✔Steam that has given up its heat.
✔✔What is "blowback" when referring to a safety valve? - ✔✔The difference in psi
between when a safety valve pops open and then closes with a definite drop in
pressure.
✔✔Name two ways to test a safety valve. - ✔✔By Hand - Manual
By Pressure - Accumulation
✔✔How many safety valves are required on a boiler with more than 500 ft.² of heating
surface? - ✔✔2 or more
✔✔What device inside the steam pressure gauge enables it to work? Who invented it
and when? - ✔✔Bourdon Tube
Eugene Bourdon
In 1849
SOLUTIONS 2025/2026 GRADED A+
✔✔What is protecting the boiler steam pressure gauge from high temperatures? -
✔✔The siphon
✔✔How are superheaters being prevented from overheating? - ✔✔Steam circulation
✔✔As steam pressure in a boiler increases, there is a corresponding increase in what?
- ✔✔Temperature
✔✔What must boilers operating at 100 psi or over have? - ✔✔Two bottom blowdown
valves
✔✔Boilers battery equipped with manhole openings must have what? - ✔✔Two main
steam stop valves
✔✔The boiler operator should first check what when taking over a shift? - ✔✔The boiler
water level and blowdown the water column and gauge glass.
✔✔This boiler was developed to provide steam at higher pressures. - ✔✔Watertube
boiler
✔✔Where is the mud drum located? - ✔✔At the lowest part of the water side of a
watertube boiler.
✔✔How often should boilers be inspected internally and externally? - ✔✔Every year
✔✔What is a boiler? - ✔✔A closed vessel used for heating water or generating steam
by direct application of heat from combustible fuels or electricity
✔✔What is a high pressure boiler? - ✔✔Power Boiler-S
Above 15 psi steam
Above 250°F water
Above 160 psi water
✔✔What is a low pressure boiler? - ✔✔Heating boiler-H
Up to 15 psi steam
Up to 250°F water
Up to 160 psi water
✔✔What are the following BTUH limitations? - ✔✔B.O.P. = 1,676,000 output
, 1st Grade = No Limit
2nd Grade = 8,380,000
3rd Grade = 3,352,000
✔✔What is saturated steam? - ✔✔Saturated with heat. Has a temperature that
corresponds to the pressure that it was generated from.
✔✔Define boiler horsepower - ✔✔The evaporation of 34.5 pounds of water per hour at
the feedwater temperature of 212°F by adding 970.4 BTUs of latent heat per pound of
water.
✔✔Name the five positions of the boiler code and licensing board. - ✔✔E-1
Professional engineer
I-2 Installer of Boilers
O-3 Boiler Operator (1st Grade 10+ yrs)
U-4 User of Boilers
C-5 Chief Boiler Inspector (Jim Harrison)
✔✔What are the four basic boiler systems? - ✔✔Fuel System
Draft System
Feedwater System
Steam System
✔✔What is a "pork chop?" - ✔✔Nickname for a cast-iron sectional
✔✔What is the breaching? - ✔✔It is the connection between the boiler and the chimney
or stack
✔✔What is condensate? - ✔✔Steam that has given up its heat.
✔✔What is "blowback" when referring to a safety valve? - ✔✔The difference in psi
between when a safety valve pops open and then closes with a definite drop in
pressure.
✔✔Name two ways to test a safety valve. - ✔✔By Hand - Manual
By Pressure - Accumulation
✔✔How many safety valves are required on a boiler with more than 500 ft.² of heating
surface? - ✔✔2 or more
✔✔What device inside the steam pressure gauge enables it to work? Who invented it
and when? - ✔✔Bourdon Tube
Eugene Bourdon
In 1849
