Ohio Stationary Steam Engineer.
Latest Edition 2025-2026. Questions &
Correct Answers. Graded A
2 forces of equal intensity acting in opposite directions is? - ANStension
A boiler has been under stress for an extended period of time with high
alakalinity concentration maintained in the water. This can cause? -
ANScaustic embrittlement
A boiler has carried a large slug of water over into steam. This condition is
called: - ANSpriming
A boiler is an industrial boiler when - ANSthe steam generated is used for
process
A boiler is industrial when: - ANSThe steam is used for a manufacturing
process
A centrifugal pump is characterized by its: - ANSdiffusion rings
a centrifugal pumps performance and long life depend on: - ANSwear rings
and thrust imposed
1
,A difference between a check valve and a non-return valve is: - ANSa non-
return valve acts as a "cushioning" valve that helps prevent chattering
A flame scanner containing a lead sulfide cell is sensitive to - ANSInfrared
radiation
A gauge that reads higher than actual boiler pressure is called a: - ANSfast
gauge
A high-viscosity lubricant is more likely to develop ______ than a low-
viscosity oil? - ANSHeat
A lubrication with low viscosity is usually: - ANSadapted to high RPM use
A motor-driven mechanical centrifuge is used for? - ANSreconditioning
turbine oil
A steam turbine operates at 4500 RM. At what speed should the trip be
set? - ANS4950 (10% over normal operation speed)
A steam turbine that operates at 500 psi is considered? - ANShigh
pressure
A sudden increase in the temp of the flue gases entering the stack from the
breeching would likely indicate: - ANSa broken flue gas baffle
2
,A superheater safety valve relieves how much of the total steam produced
by the boiler? - ANS20%
A therm of natural gas is_____ - ANS100,000 BTU reguarless of the exact
volume
A thermostatic steam trap opens under what conditions? - ANSWhen the
temp inside the trap lowers
A turbine exhausts steam @ 15 psi. This steam is used in a low-pressure
application such as a deareator. this type of turbine is called a: - ANSback-
pressure turbine
A type of pump that uses the velocity of steam against a mass of water is
a : - ANSinjector
A wet scrubber that has been maintained properly has the capablility of
absorbing ____% of SO2 in flue gases - ANS90%
adding water to increase combustion in a coal fired boiler is called: -
ANStempering
All of the following are causes of vibration in a turbine EXCEPT:
-priming from boiler
-misalignment of the turbine shaft
-condenser cooling water too warm
-passing through critical speed - ANScondenser cooling water too warm
3
, An impulse turbine utilizes one row of stationary nozzles which increase the
velocity of the steam enough to drive 2 rows of rotating blades. This type of
turbine is called a: - ANSVelocity-compound turbine
At what temp does a fusible plug melt? - ANS450 degrees
At what temp should you add cooling water to a turbines bearings? -
ANS110-120 degrees
Before dumping a boiler, which conditon should be met? - ANSthe boiler
metal should be cool enough to touch contunually
Blowdown (blowback) of a safety valve should not be less than ____psi in
any case - ANS2psi
Blowdown (blowback) of a safety valve should not be more than ____% in
any case - ANS4%
Boilers laid up dry, have what material placed inside to absorb moisture? -
ANSQuicklime or silica gel
Calcium and magnesium are removed by what external water treatment
process that can be regenerated using sodium chloride? - ANSzeolite
softener
4
Latest Edition 2025-2026. Questions &
Correct Answers. Graded A
2 forces of equal intensity acting in opposite directions is? - ANStension
A boiler has been under stress for an extended period of time with high
alakalinity concentration maintained in the water. This can cause? -
ANScaustic embrittlement
A boiler has carried a large slug of water over into steam. This condition is
called: - ANSpriming
A boiler is an industrial boiler when - ANSthe steam generated is used for
process
A boiler is industrial when: - ANSThe steam is used for a manufacturing
process
A centrifugal pump is characterized by its: - ANSdiffusion rings
a centrifugal pumps performance and long life depend on: - ANSwear rings
and thrust imposed
1
,A difference between a check valve and a non-return valve is: - ANSa non-
return valve acts as a "cushioning" valve that helps prevent chattering
A flame scanner containing a lead sulfide cell is sensitive to - ANSInfrared
radiation
A gauge that reads higher than actual boiler pressure is called a: - ANSfast
gauge
A high-viscosity lubricant is more likely to develop ______ than a low-
viscosity oil? - ANSHeat
A lubrication with low viscosity is usually: - ANSadapted to high RPM use
A motor-driven mechanical centrifuge is used for? - ANSreconditioning
turbine oil
A steam turbine operates at 4500 RM. At what speed should the trip be
set? - ANS4950 (10% over normal operation speed)
A steam turbine that operates at 500 psi is considered? - ANShigh
pressure
A sudden increase in the temp of the flue gases entering the stack from the
breeching would likely indicate: - ANSa broken flue gas baffle
2
,A superheater safety valve relieves how much of the total steam produced
by the boiler? - ANS20%
A therm of natural gas is_____ - ANS100,000 BTU reguarless of the exact
volume
A thermostatic steam trap opens under what conditions? - ANSWhen the
temp inside the trap lowers
A turbine exhausts steam @ 15 psi. This steam is used in a low-pressure
application such as a deareator. this type of turbine is called a: - ANSback-
pressure turbine
A type of pump that uses the velocity of steam against a mass of water is
a : - ANSinjector
A wet scrubber that has been maintained properly has the capablility of
absorbing ____% of SO2 in flue gases - ANS90%
adding water to increase combustion in a coal fired boiler is called: -
ANStempering
All of the following are causes of vibration in a turbine EXCEPT:
-priming from boiler
-misalignment of the turbine shaft
-condenser cooling water too warm
-passing through critical speed - ANScondenser cooling water too warm
3
, An impulse turbine utilizes one row of stationary nozzles which increase the
velocity of the steam enough to drive 2 rows of rotating blades. This type of
turbine is called a: - ANSVelocity-compound turbine
At what temp does a fusible plug melt? - ANS450 degrees
At what temp should you add cooling water to a turbines bearings? -
ANS110-120 degrees
Before dumping a boiler, which conditon should be met? - ANSthe boiler
metal should be cool enough to touch contunually
Blowdown (blowback) of a safety valve should not be less than ____psi in
any case - ANS2psi
Blowdown (blowback) of a safety valve should not be more than ____% in
any case - ANS4%
Boilers laid up dry, have what material placed inside to absorb moisture? -
ANSQuicklime or silica gel
Calcium and magnesium are removed by what external water treatment
process that can be regenerated using sodium chloride? - ANSzeolite
softener
4
