STATIONARY ENGINEERING – ADVANCED PRACTICE QUESTIONS AND ANSWERS FOR BOILER
OPERATIONS AND STATIONARY ENGINEER CERTIFICATION A+ VERIFIED LATEST VERSION (
2026-2027)
1. There must be adequate across any steam trap for the condensate
and/or air to be removed from the steam system.: ditterential pressure
2. When 200 lb of water is heated from 62°F to 75°F, Btu is absorbed.: 2600
3. A(n) is used to reduce sulfur dioxide emissions.: flue gas scrubber
4. A protects a Bourdon tube inside a pressure gauge from warping due to
the high temperature of the steam.: siphon loop
5. A column of water 150′-0″ high exerts a pressure of psi at the bottom of
the column.: 65
6. The short stubs of piping connected to a boiler during construction to
provide attachment points for piping and appliances are called .: nozzles
7. A dryback scotch marine firetube boiler is 8′-6″ in diameter and has a flue
furnace that is 30″ in diameter. The boiler is 17′-3″ long and has 122 tubes that
are 2″ in diameter. If the tube sheets are disregarded, the boiler has sq ft
of heating surface.: 1239
8. is the erosion that occurs as steam or another high-velocity fluid streaks
through a small opening, such as one created by a throttled valve.: wire drawing
9. Boiler tubes can fail due to .: all of the above
10. The circumference of a boiler shell that is 6′-3″ in diameter is ′.: 19.652
11. When a boiler is equipped with a superheater, the safety valve that should
lift at the lowest pressure is .: the super heater safety valve
12. A(n) line provides a minimum flow through a centrifugal pump to
prevent overheating and cavitation when the pump must operate against a
closed discharge valve for a period of time.: recirculation
13. An area of 32 sq ft contains sq in.: 4608
14. The acronym MATT stands for .: mixture, atomization, time, and temperature
15. Grades of fuel oil are designated by number. They range from through
.: 1 - 6
16. The order in which a sodium zeolite water softener regenerates is .: back-
wash, brine, and rinse
17. A valve should be placed at the discharge of a positive-displacement
pump.: relief
1/8
, STATIONARY ENGINEERING – ADVANCED PRACTICE QUESTIONS AND ANSWERS FOR BOILER
OPERATIONS AND STATIONARY ENGINEER CERTIFICATION A+ VERIFIED LATEST VERSION (
2026-2027)
18. Large amounts of combustible material in furnace ash are most likely
caused by .: inadequate forced draft
19. is the collection of mineral deposits formed on the heating surfaces of
a boiler.: scale
20. is the hydraulic shock that can result from water buildup in steam
piping.: water hammer
21. are chemicals that cause hardness crystals in boiler water to settle out
as a heavy sludge.: phasphates
22. How should a motor-driven centrifugal pump be started to minimize the
starting current draw on the motor?: with the suction valve wide open and the discharge valve
closed
23. is the ability of a material to deform permanently under compression
without rupture.: malleability
24. The main pressure gauge on a boiler must be able to read at least times
the MAWP of the boiler.: 1.5
25. A(n) regulator automatically maintains a constant, safe water level in a
boiler.: feed water
26. " " is the term commonly used for expansion of water when it is heated.-
: swell
27. is the measure of the ability of an electric circuit to allow current flow.-
: conductivity
28. is the measure of the ability of an electric circuit to allow current flow.-
: proving
29. One horsepower equals ft-lb of work in 1 min.: 33000
30. Once the steam flow reaches about % of the capacity of the boiler, the
feedwater regulating system may be placed in three-element mode.: 10
31. If the water level in a boiler has become dangerously low due to a control
problem and the control suddenly begins working again, .: a large volume of water
may be added, causing thermal shock
32. A(n) impeller has a shroud on one side of the vanes.: semi closed
33. A(n) is an instrument that measures temperatures above the tempera-
ture range of a mercury thermometer.: pyrometer
2/8
OPERATIONS AND STATIONARY ENGINEER CERTIFICATION A+ VERIFIED LATEST VERSION (
2026-2027)
1. There must be adequate across any steam trap for the condensate
and/or air to be removed from the steam system.: ditterential pressure
2. When 200 lb of water is heated from 62°F to 75°F, Btu is absorbed.: 2600
3. A(n) is used to reduce sulfur dioxide emissions.: flue gas scrubber
4. A protects a Bourdon tube inside a pressure gauge from warping due to
the high temperature of the steam.: siphon loop
5. A column of water 150′-0″ high exerts a pressure of psi at the bottom of
the column.: 65
6. The short stubs of piping connected to a boiler during construction to
provide attachment points for piping and appliances are called .: nozzles
7. A dryback scotch marine firetube boiler is 8′-6″ in diameter and has a flue
furnace that is 30″ in diameter. The boiler is 17′-3″ long and has 122 tubes that
are 2″ in diameter. If the tube sheets are disregarded, the boiler has sq ft
of heating surface.: 1239
8. is the erosion that occurs as steam or another high-velocity fluid streaks
through a small opening, such as one created by a throttled valve.: wire drawing
9. Boiler tubes can fail due to .: all of the above
10. The circumference of a boiler shell that is 6′-3″ in diameter is ′.: 19.652
11. When a boiler is equipped with a superheater, the safety valve that should
lift at the lowest pressure is .: the super heater safety valve
12. A(n) line provides a minimum flow through a centrifugal pump to
prevent overheating and cavitation when the pump must operate against a
closed discharge valve for a period of time.: recirculation
13. An area of 32 sq ft contains sq in.: 4608
14. The acronym MATT stands for .: mixture, atomization, time, and temperature
15. Grades of fuel oil are designated by number. They range from through
.: 1 - 6
16. The order in which a sodium zeolite water softener regenerates is .: back-
wash, brine, and rinse
17. A valve should be placed at the discharge of a positive-displacement
pump.: relief
1/8
, STATIONARY ENGINEERING – ADVANCED PRACTICE QUESTIONS AND ANSWERS FOR BOILER
OPERATIONS AND STATIONARY ENGINEER CERTIFICATION A+ VERIFIED LATEST VERSION (
2026-2027)
18. Large amounts of combustible material in furnace ash are most likely
caused by .: inadequate forced draft
19. is the collection of mineral deposits formed on the heating surfaces of
a boiler.: scale
20. is the hydraulic shock that can result from water buildup in steam
piping.: water hammer
21. are chemicals that cause hardness crystals in boiler water to settle out
as a heavy sludge.: phasphates
22. How should a motor-driven centrifugal pump be started to minimize the
starting current draw on the motor?: with the suction valve wide open and the discharge valve
closed
23. is the ability of a material to deform permanently under compression
without rupture.: malleability
24. The main pressure gauge on a boiler must be able to read at least times
the MAWP of the boiler.: 1.5
25. A(n) regulator automatically maintains a constant, safe water level in a
boiler.: feed water
26. " " is the term commonly used for expansion of water when it is heated.-
: swell
27. is the measure of the ability of an electric circuit to allow current flow.-
: conductivity
28. is the measure of the ability of an electric circuit to allow current flow.-
: proving
29. One horsepower equals ft-lb of work in 1 min.: 33000
30. Once the steam flow reaches about % of the capacity of the boiler, the
feedwater regulating system may be placed in three-element mode.: 10
31. If the water level in a boiler has become dangerously low due to a control
problem and the control suddenly begins working again, .: a large volume of water
may be added, causing thermal shock
32. A(n) impeller has a shroud on one side of the vanes.: semi closed
33. A(n) is an instrument that measures temperatures above the tempera-
ture range of a mercury thermometer.: pyrometer
2/8
