OHIO STATIONARY STEAM ENGINEER EXAM 280
QUESTIONS & CORRECT ANSWERS LATEST 2025
Combustion efficiency may be increased by_____ the primary air - ANSWER-
Preheating
What is the purpose of cinder reinjection? - ANSWER-increase efficiency
2 forces of equal intensity acting in opposite directions is? - ANSWER-tension
What is true about the dew poimt of flue gasses - ANSWER-dew point is the temp
at which the gasses will condense
What will not cause high stack temps? - ANSWER-plugged dry pipe
What is true about smoke - ANSWER-smoke consists of unburned hydrocarbons
WHat is used to reduce SO2 emissions in coal fired boilers? - ANSWER-Wet or dry
scrubbers
In a solid fuel fired boiler, a gradual increase in flue gas exit temps over a course
of a shift inidicates the boiler operator needs to _______ - ANSWER-operate soot
blowers
,What watertube bolier is the largest in size and steam-generating compacitity -
ANSWER-Utility watertube boiler
the blowdown on a safety valve can be altered by changing the setting of the
_____ - ANSWER-huddling ring
Copper and brass piping may be used for piping systems as long as the temp does
not exceed - ANSWER-406 degrees
What is not measured in a 3 element feedwater system
-feedwater flow
-drum pressure
-steam flow
-drum level - ANSWER-drum pressure
If the flame in a gas-fired bolier is pulsating how can the problem be fixed? -
ANSWER-increase furnace draft
Grindability of coal is an issue to be considered when operating which kid of coal-
burining equipment? - ANSWER-ball-and-race pulvarizer
When using an induced draft fan, where will the strongest negative draft be found
- ANSWER-at the inlet of the ID fan
How do you bank a fuel oil-fired boiler? - ANSWER-turn off the fuel and air
supplies, the re-light the burner as necessary to maintain a predetermined
minimum steam pressure
,What is true about the lube oil used in a steam turbine - ANSWER-it must readily
seperate oil and water
What supplies the oil to a large steam turbine during start-up - ANSWER-aux oil
pump
What device prevents the over-travel of the governor linkage that might be
caused by the weight of the governor components - ANSWER-Dashpot
When taking a boiler out of service what should you not do - ANSWER-close the
vent
what type of turbine oil purification system periodically removes a potion of the
oil and replaces it with fresh oil? - ANSWER-makeup oil system
what type of steam turbine system has steam take-offs prior to going into the
condenser? - ANSWER-extraction turbine
What is the pressure above which the exhaust side of a steam turbine and the
connected piping may be protected by either a safety valve or a rupture disc, or a
combination of the 2 - ANSWER-15 psi
What grade fuel oil may be ignited by an electric spark from electrodes powered
by an ignition transformer? - ANSWER-#2
, what is the cheapest, easiest form of water treatment? - ANSWER-heating the
water
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: - ANSWER-back-
pressure turbine
At what temp should you add cooling water to a turbines bearings? - ANSWER-
110-120 degrees
What is produced from the reaction between sodium sulfite and oxygen? -
ANSWER-sodium sulfate
What is the purpose of an attemperator - ANSWER-reduce temp of superheated
steam by adding a water mist
What are the 2 main methods by which steam is prevented from leaking out
around the turbine shaft where the shaft exits the casing? - ANSWER-labyrinth
seals and carbon rings
If the water in a boiler is foaming, the water level indication in the gauge glass will
be: - ANSWER-erratic
Cast iron or ductile iron pipe is used for: - ANSWER-underground water supply
and drainage
What is the maximum allowable level of dissolved solids in the steam being
supplied to a steam turbine? - ANSWER-.1 ppm
QUESTIONS & CORRECT ANSWERS LATEST 2025
Combustion efficiency may be increased by_____ the primary air - ANSWER-
Preheating
What is the purpose of cinder reinjection? - ANSWER-increase efficiency
2 forces of equal intensity acting in opposite directions is? - ANSWER-tension
What is true about the dew poimt of flue gasses - ANSWER-dew point is the temp
at which the gasses will condense
What will not cause high stack temps? - ANSWER-plugged dry pipe
What is true about smoke - ANSWER-smoke consists of unburned hydrocarbons
WHat is used to reduce SO2 emissions in coal fired boilers? - ANSWER-Wet or dry
scrubbers
In a solid fuel fired boiler, a gradual increase in flue gas exit temps over a course
of a shift inidicates the boiler operator needs to _______ - ANSWER-operate soot
blowers
,What watertube bolier is the largest in size and steam-generating compacitity -
ANSWER-Utility watertube boiler
the blowdown on a safety valve can be altered by changing the setting of the
_____ - ANSWER-huddling ring
Copper and brass piping may be used for piping systems as long as the temp does
not exceed - ANSWER-406 degrees
What is not measured in a 3 element feedwater system
-feedwater flow
-drum pressure
-steam flow
-drum level - ANSWER-drum pressure
If the flame in a gas-fired bolier is pulsating how can the problem be fixed? -
ANSWER-increase furnace draft
Grindability of coal is an issue to be considered when operating which kid of coal-
burining equipment? - ANSWER-ball-and-race pulvarizer
When using an induced draft fan, where will the strongest negative draft be found
- ANSWER-at the inlet of the ID fan
How do you bank a fuel oil-fired boiler? - ANSWER-turn off the fuel and air
supplies, the re-light the burner as necessary to maintain a predetermined
minimum steam pressure
,What is true about the lube oil used in a steam turbine - ANSWER-it must readily
seperate oil and water
What supplies the oil to a large steam turbine during start-up - ANSWER-aux oil
pump
What device prevents the over-travel of the governor linkage that might be
caused by the weight of the governor components - ANSWER-Dashpot
When taking a boiler out of service what should you not do - ANSWER-close the
vent
what type of turbine oil purification system periodically removes a potion of the
oil and replaces it with fresh oil? - ANSWER-makeup oil system
what type of steam turbine system has steam take-offs prior to going into the
condenser? - ANSWER-extraction turbine
What is the pressure above which the exhaust side of a steam turbine and the
connected piping may be protected by either a safety valve or a rupture disc, or a
combination of the 2 - ANSWER-15 psi
What grade fuel oil may be ignited by an electric spark from electrodes powered
by an ignition transformer? - ANSWER-#2
, what is the cheapest, easiest form of water treatment? - ANSWER-heating the
water
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: - ANSWER-back-
pressure turbine
At what temp should you add cooling water to a turbines bearings? - ANSWER-
110-120 degrees
What is produced from the reaction between sodium sulfite and oxygen? -
ANSWER-sodium sulfate
What is the purpose of an attemperator - ANSWER-reduce temp of superheated
steam by adding a water mist
What are the 2 main methods by which steam is prevented from leaking out
around the turbine shaft where the shaft exits the casing? - ANSWER-labyrinth
seals and carbon rings
If the water in a boiler is foaming, the water level indication in the gauge glass will
be: - ANSWER-erratic
Cast iron or ductile iron pipe is used for: - ANSWER-underground water supply
and drainage
What is the maximum allowable level of dissolved solids in the steam being
supplied to a steam turbine? - ANSWER-.1 ppm
