Podcast
Questions and Answers
What winding is connected to the load?
What winding is connected to the load?
secondary
What regulates the steam pressure?
What regulates the steam pressure?
modulating pressure control
When can you blow down a water wall?
When can you blow down a water wall?
when there is no pressure on the boiler
What must be done to prevent flashback?
What must be done to prevent flashback?
Steam at a high velocity is converted into ______ energy?
Steam at a high velocity is converted into ______ energy?
What is the supercritical pressure and saturation temperature?
What is the supercritical pressure and saturation temperature?
One gallon of water weighs?
One gallon of water weighs?
What is the cylinder color of R-407C?
What is the cylinder color of R-407C?
What is the cylinder color of R-404A?
What is the cylinder color of R-404A?
How are particulates discharged into hoppers?
How are particulates discharged into hoppers?
When were the first regulations of the Clean Air Act established?
When were the first regulations of the Clean Air Act established?
How many cubic inches of steam space is in a cylinder of an engine 10" x 24" with a stroke 2/3 of full travel?
How many cubic inches of steam space is in a cylinder of an engine 10" x 24" with a stroke 2/3 of full travel?
Where is the flame-sensing device located?
Where is the flame-sensing device located?
Oil cooler pumps should be maintained at?
Oil cooler pumps should be maintained at?
What is a fail-safe device that cannot recluse itself?
What is a fail-safe device that cannot recluse itself?
What controls the speed of the turbine?
What controls the speed of the turbine?
What two elements produce the most heat in fuel?
What two elements produce the most heat in fuel?
What removes non-condensables?
What removes non-condensables?
Where would scale form?
Where would scale form?
What is Cold Junction?
What is Cold Junction?
Where would you find downcomers?
Where would you find downcomers?
What chemicals are used to perform water treatment?
What chemicals are used to perform water treatment?
What minerals cause scale?
What minerals cause scale?
What is the process of introducing fresh air into a building?
What is the process of introducing fresh air into a building?
A boiler requiring excessive amounts of oxygen scavenging chemicals could indicate?
A boiler requiring excessive amounts of oxygen scavenging chemicals could indicate?
What device opens at 75% of the motor's rated speed?
What device opens at 75% of the motor's rated speed?
Bursting psi is 1200, allowable PSI is 200. Safety Factor?
Bursting psi is 1200, allowable PSI is 200. Safety Factor?
What is the corrugated furnace used in vertical tubular or horizontal firebox boilers?
What is the corrugated furnace used in vertical tubular or horizontal firebox boilers?
What is an automatic valve with two valves and two discs?
What is an automatic valve with two valves and two discs?
What is the corrugated furnace used primarily in horizontal furnaces?
What is the corrugated furnace used primarily in horizontal furnaces?
Transformers are rated in?
Transformers are rated in?
Water expanding to steam has what ratio?
Water expanding to steam has what ratio?
What is the primary purpose of wet scrubbers?
What is the primary purpose of wet scrubbers?
What technique is used to control particulates from boilers?
What technique is used to control particulates from boilers?
What safety valve is set lower in pressure?
What safety valve is set lower in pressure?
What is the process of a water softener?
What is the process of a water softener?
What is the advantage of an open feedwater heater?
What is the advantage of an open feedwater heater?
What is the evaporator approach temperature of a 3 pass chiller?
What is the evaporator approach temperature of a 3 pass chiller?
What are the two main types of condensers?
What are the two main types of condensers?
What is the minimal amount of volume air changes in a purge cycle?
What is the minimal amount of volume air changes in a purge cycle?
How much BHP does 86,260 lbs/hr equal?
How much BHP does 86,260 lbs/hr equal?
What method introduces lime and water into flue gas?
What method introduces lime and water into flue gas?
What controls NOx emissions in gas turbine plants?
What controls NOx emissions in gas turbine plants?
How many BTUs are required to turn 1 lb of water into 1 lb of steam?
How many BTUs are required to turn 1 lb of water into 1 lb of steam?
What is the specific heat formula?
What is the specific heat formula?
What controls the axial position of the turbine?
What controls the axial position of the turbine?
What is the primary controlling device on a three-element feedwater regulator?
What is the primary controlling device on a three-element feedwater regulator?
What are the classifications of centrifugal pumps?
What are the classifications of centrifugal pumps?
What are vapor bubbles forming and collapsing called?
What are vapor bubbles forming and collapsing called?
What is the control sequence for air circulation?
What is the control sequence for air circulation?
What is the feedwater control valve controlled by?
What is the feedwater control valve controlled by?
Hardness that can be reduced by boiling is called _____ hardness?
Hardness that can be reduced by boiling is called _____ hardness?
What is the evaporator approach temperature of a four-pass chiller?
What is the evaporator approach temperature of a four-pass chiller?
Hardness that can be reduced by chemicals is called _____?
Hardness that can be reduced by chemicals is called _____?
To convert inches of mercury to PSI, you multiply by _____?
To convert inches of mercury to PSI, you multiply by _____?
What is the pulley formula?
What is the pulley formula?
What tests the relieving capacity of a safety valve?
What tests the relieving capacity of a safety valve?
To convert PSI to inches of mercury, you would use the formula _____?
To convert PSI to inches of mercury, you would use the formula _____?
What is a common chemical testing method?
What is a common chemical testing method?
Copper testing is used for?
Copper testing is used for?
What should the temperature be when the water leaves the DA Tank?
What should the temperature be when the water leaves the DA Tank?
What is the normal operating temperature in a DA?
What is the normal operating temperature in a DA?
What should you do if the water level is slowly decreasing?
What should you do if the water level is slowly decreasing?
Which of the following are the two types of mechanical draft cooling towers? (Select all that apply)
Which of the following are the two types of mechanical draft cooling towers? (Select all that apply)
What pump supplies the water to the condenser to condensate the steam?
What pump supplies the water to the condenser to condensate the steam?
Given a single-phase 120-volt motor with a current drop of 24.2 amperes and a power factor rating of 90 percent, what is the motor's electrical load in kilowatts?
Given a single-phase 120-volt motor with a current drop of 24.2 amperes and a power factor rating of 90 percent, what is the motor's electrical load in kilowatts?
Which of the following are the two types of condensers?
Which of the following are the two types of condensers?
What uses the theory of centrifugal force to control the speed of the turbine?
What uses the theory of centrifugal force to control the speed of the turbine?
What must you do to prevent air from leaking into a condenser?
What must you do to prevent air from leaking into a condenser?
The condensate pump removes water from the _____
The condensate pump removes water from the _____
Turbine drains are supplied with traps that are _____ when the turbine is in operation and _____ when it is being started up.
Turbine drains are supplied with traps that are _____ when the turbine is in operation and _____ when it is being started up.
What is fail-safe and cannot be reclosed or reset if it malfunctions?
What is fail-safe and cannot be reclosed or reset if it malfunctions?
How are non-condensable gases and air removed from the condenser?
How are non-condensable gases and air removed from the condenser?
An explosion or flashback in a boiler can be caused by?
An explosion or flashback in a boiler can be caused by?
Which of the following is not the purpose of an air cock on a steam drum?
Which of the following is not the purpose of an air cock on a steam drum?
It is necessary to keep a water seal on the atmospheric relief valve to?
It is necessary to keep a water seal on the atmospheric relief valve to?
In a pulverized coal plant, how is coal conveyed to the burners?
In a pulverized coal plant, how is coal conveyed to the burners?
In a water tube boiler, overheating of the tubes might be caused by?
In a water tube boiler, overheating of the tubes might be caused by?
Air is bypassed around the air heater when?
Air is bypassed around the air heater when?
Water wall header drains used for blow-down should only be used under which condition?
Water wall header drains used for blow-down should only be used under which condition?
What device regulates the burner depending on the steam pressure in the boiler?
What device regulates the burner depending on the steam pressure in the boiler?
Given: Thermocouples have both a hot junction and a cold junction. The cold junction measures the ____ point.
Given: Thermocouples have both a hot junction and a cold junction. The cold junction measures the ____ point.
In a three-element feed water control system, what is the main factor in determining regulation of feed water?
In a three-element feed water control system, what is the main factor in determining regulation of feed water?
If you are operating a boiler with a three-element feed water regulator, what is being measured and recorded by mechanically operated meters?
If you are operating a boiler with a three-element feed water regulator, what is being measured and recorded by mechanically operated meters?
How many inches of mercury are there at an atmospheric pressure of 13.93 psi?
How many inches of mercury are there at an atmospheric pressure of 13.93 psi?
Copper testing is used to detect?
Copper testing is used to detect?
Hardness that can be reduced by heating water is called ____ hardness?
Hardness that can be reduced by heating water is called ____ hardness?
According to Stationary Engineering, residual sodium sulfite in the boiler should be maintained between ____ ppm and ____ ppm?
According to Stationary Engineering, residual sodium sulfite in the boiler should be maintained between ____ ppm and ____ ppm?
What is the proper order for the four regeneration steps for a sodium zeolite water softener?
What is the proper order for the four regeneration steps for a sodium zeolite water softener?
The chemicals used to perform water treatment tests are called ____
The chemicals used to perform water treatment tests are called ____
A four wire, wye-connected system with a phase-to-phase voltage of 208V has a phase to neutral voltage of ____V?
A four wire, wye-connected system with a phase-to-phase voltage of 208V has a phase to neutral voltage of ____V?
On a single-phase motor, what device opens at 75 percent of the motor's rated speed, disconnecting the start winding?
On a single-phase motor, what device opens at 75 percent of the motor's rated speed, disconnecting the start winding?
Large centrifugal chillers (excluding electronic start) primarily use what type of motor starting to reduce inrush current on start-up?
Large centrifugal chillers (excluding electronic start) primarily use what type of motor starting to reduce inrush current on start-up?
The perforated plate-type baffle at the steam outlet in a boiler steam drum is installed to?
The perforated plate-type baffle at the steam outlet in a boiler steam drum is installed to?
The fly ash buildup is cleaned from the collector plates and electrodes in the electrostatic precipitator by?
The fly ash buildup is cleaned from the collector plates and electrodes in the electrostatic precipitator by?
Which type of stoker feed system uses a ram feed?
Which type of stoker feed system uses a ram feed?
What are the two chief heat-producing elements in fuel?
What are the two chief heat-producing elements in fuel?
What should the water temperature be when leaving the deaerator?
What should the water temperature be when leaving the deaerator?
How do you ensure that complete combustion will take place in the combustion chamber?
How do you ensure that complete combustion will take place in the combustion chamber?
Which coal has the highest volume of fixed carbon?
Which coal has the highest volume of fixed carbon?
Study Notes
Boiler Operations and Controls
- Secondary Winding: Connects to the load in electrical systems.
- Modulating Pressure Control: Regulates steam pressure to maintain system balance.
- Flame Sensing Device: Located on the front of the furnace for safety monitoring.
- Oil Cooler Maintenance: Should be kept between 140-160°F for optimal performance.
Water and Steam Properties
- Steam Velocity: High-velocity steam converts kinetic energy into usable energy.
- One Gallon of Water: Weighs approximately 8.33 pounds.
- Supercritical Pressure: At 3206 PSIA, the saturation temperature is 705.4°F.
- Expansion Ratio: Water expands to steam at a ratio of 1600:1.
Chemical and Water Treatment
- Water Treatment Chemicals: Reagents are used for effective water treatment.
- Scale Formation: Primarily caused by calcium and magnesium minerals.
- Temporary Hardness: Can be reduced by boiling water.
- Permanent Hardness: Requires chemical treatment for reduction.
Safety and Maintenance
- Rupture Disk: A fail-safe device that cannot reclose once it operates.
- Centrifugal Switch: Engages at 75% of motor's rated speed to disconnect the starting winding.
- Water Wall Header Drains: Should only be used when the boiler is not generating steam.
- Burner Regulation: Managed via modulating pressure control based on steam pressure.
Mechanical Components and Energy
- Centrifugal Pumps Classification: Includes vertical, horizontal, volute, and double suction types.
- Thrust Bearing: Controls the axial position of turbines within machinery.
- Drum Level Control: Primary controlling device for maintaining feedwater in three-element systems.
- Pulley Formula: Drive RPM multiplied by Drive Diameter equals Driven RPM multiplied by Driven Diameter.
Environmental and Emission Controls
- Wet Scrubbers: Used primarily to remove flue gas particulates from emissions.
- Selective Catalytic Reduction: An effective tool for controlling NOx emissions in gas turbines.
Energy Conversion and Efficiency
- Evaporator Approach Temperature: For a three-pass chiller, should be around 5 degrees F.
- BTUs for Steam Generation: Requires 970.3 BTUs to convert 1 lb of water to steam.
Miscellaneous
- Condensate Pump: Removes water from the condensate system to maintain efficiency.
- Ejectors/Vacuum Pumps: Utilized to remove non-condensables from steam systems.
- Test Methods: Titration is a common chemical testing method for water quality.
- Anthracite Coal: Known for having the highest volume of fixed carbon among coal types.
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Test your knowledge with these flashcards designed for engineers preparing for their licensing exam. Each card focuses on essential terms and definitions related to engineering concepts. Perfect for quick review and memorization before the big test.
