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Ohio stationary steam engineer Exam Questions with Verified Answers
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Ohio stationary steam engineer Exam Questions with Verified Answers
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Ohio stationary steam engineer ExamQuestions with Verified Answers
Combustion efficiency may be increased by_____ the primary air - -
Preheating
-What is the purpose of cinder reinjection? - -increase efficiency
-2 forces of equal intensity acting in opposite directions is? - -tension
-What is true about the dew poimt of flue gasses - -dew point is the temp at
which the gasses will condense
-What will not cause high stack temps? - -plugged dry pipe
-What is true about smoke - -smoke consists of unburned hydrocarbons
-WHat is used to reduce SO2 emissions in coal fired boilers? - -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 _______ - -operate
soot blowers
-What watertube bolier is the largest in size and steam-generating
compacitity - -Utility watertube boiler
-the blowdown on a safety valve can be altered by changing the setting of
the _____ - -huddling ring
-Copper and brass piping may be used for piping systems as long as the
temp does not exceed - -406 degrees
-What is not measured in a 3 element feedwater system
-feedwater flow
-drum pressure
-steam flow
-drum level - -drum pressure
-If the flame in a gas-fired bolier is pulsating how can the problem be fixed?
- -increase furnace draft
-Grindability of coal is an issue to be considered when operating which kid of
coal-burining equipment? - -ball-and-race pulvarizer
, -When using an induced draft fan, where will the strongest negative draft be
found - -at the inlet of the ID fan
-How do you bank a fuel oil-fired boiler? - -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 - -it must readily
seperate oil and water
-What supplies the oil to a large steam turbine during start-up - -aux oil
pump
-What device prevents the over-travel of the governor linkage that might be
caused by the weight of the governor components - -Dashpot
-When taking a boiler out of service what should you not do - -close the
vent
-what type of turbine oil purification system periodically removes a potion of
the oil and replaces it with fresh oil? - -makeup oil system
-what type of steam turbine system has steam take-offs prior to going into
the condenser? - -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 - -15 psi
-What grade fuel oil may be ignited by an electric spark from electrodes
powered by an ignition transformer? - -#2
-what is the cheapest, easiest form of water treatment? - -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: - -back-
pressure turbine
-At what temp should you add cooling water to a turbines bearings? - -110-
120 degrees
-What is produced from the reaction between sodium sulfite and oxygen? - -
sodium sulfate
, -What is the purpose of an attemperator - -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? - -labyrinth
seals and carbon rings
-If the water in a boiler is foaming, the water level indication in the gauge
glass will be: - -erratic
-Cast iron or ductile iron pipe is used for: - -underground water supply and
drainage
-What is the maximum allowable level of dissolved solids in the steam being
supplied to a steam turbine? - -.1 ppm
-If a boiler requires a second safety valve, the highest pressure setting on
the additional valve should not exceed the MAWP by more than - -3%
-Steam is tapped off a turbine casing at several pressures for aux. uses in
the production plant. the steam is called: - -extraction steam
-If the tubes in a boiler are flared during installation, which of the following is
true?
-The ID is increased
-The OD is decreased
-The length is decreased
-the wall thickness is increased - -The ID is increased
-What problem is caused by dirty condenser tubes? - -inability to maintain a
normal vacuum on condenser
-A lubrication with low viscosity is usually: - -adapted to high RPM use
-On a bicolor gauge glass water will appear ____ and steam will appear _____
- -green, red
-Name 2 common classes of steam turbine blading: - -impulsive and
reactive
-Which of the following is NOT an advantage of operating a steam turbine
condensing?
-the condensate from the steam in recovered
-the HP developed by the turbine is increased
-The speed of the turbine is decreased
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