2nd Class Power Engineering (2B3) Practice Exam

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• What is a disadvantage of a gas turbine related to efficiency?
• What is the function of an economizer?
• Which two methods are effective in decreasing NOx emissions?
• Positive displacement compressor types include:
• What characterizes a natural draft cooling tower?
• In a mechanical-hydraulic governor system, what is the purpose of the auxiliary oil pump?
• When the exit pressure of a steam turbine nozzle is less than 0.577 times the inlet pressure, which type of nozzle is utilized?
• How does pressure affect the boiling point of water?
• What safety measures are typically employed in high-pressure steam systems?
• Where are regenerators installed in a gas turbine system?
• Which system is likely to require many auxiliaries to ensure efficiency?
• What does effective intercooling primarily aim to minimize in a gas turbine operation?
• What role does the cooling water system play in a power plant?
• What is a common indicator of a system's combustion efficiency?
• What is a safety valve and its purpose?
• What is a primary benefit of using high-pressure steam in power plants?
• What is a common method for improving air quality entering gas turbines?
• What is the purpose of a steam separator?
• Which of the following is an advantage of using natural gas over coal in power generation?
• What are the environmental effects associated with coal combustion?
• What does the governor in a diesel engine control?
• What is the lubrication method commonly used for small turbines that drive auxiliary equipment?
• What is the purpose of vibration accelerometers in gas turbines?
• How does scaling affect heat transfer in evaporating systems?
• How is power extracted in a gas turbine?
• What design feature helps cyclone separators achieve their purpose effectively?
• What is the primary function of superchargers in diesel engines?
• A carbo-blast cleaning involves which method?
• What is a potential issue caused by insufficient inlet air temperature control?
• What is the first step in the startup process after a trip?
• What does the term 'maximum outage time' refer to in the context of gas turbines?
• What is the primary control method for dry low NOx burners?
• What device is used to activate an inlet air unloader by responding to receiver pressure?
• A magneto ignition system:
• What is the final step in the sequence of starting a Gas Turbine?
• Which statement regarding liquid receivers is incorrect?
• What type of heat exchanger is installed in condensing heat recovery systems to counter the corrosive nature of high sulphur content condensate?
• A fuel gas compressor must be used on gas turbines if?
• What principle is used in superheating steam?
• What is a "boiler blow-off"?
• What does measurement of flue gas components typically assess?
• Low-pressure feedwater heaters are exposed to the discharge pressure of which type of pump?
• Adjustable inlet diffuser vanes on centrifugal air compressors are implemented to:
• When operating a steam system, what is essential for ensuring safety?
• What is typically monitored during regular maintenance of gas turbines?
• What is the main function of a heat recovery steam generator?
• What effect does higher combustion efficiency have on environment?
• Which cogeneration system uses exhaust gases to drive a gas turbine connected to an electrical generator?
• Which factor does NOT contribute to the efficiency of a gas turbine?
• What indicates a successful startup after a trip?
• What is the purpose of injecting cleaners while the unit is running?
• In power engineering, why is it important to control steam pressure?
• What is the primary function of the recycle valve in a gas turbine?
• What is one purpose of a thrust bearing in a large reaction steam turbine?
• What is the typical operating pressure range for a 2nd Class Power Engineer?
• Slugs of liquid from the evaporator in the absorption system can lead to what issue?
• What does increasing the pressure in a boiler system typically allow for?
• How does air typically enter a condenser?
• Which statement is true about the rotary vane compressor?
• What components are included in fuel treatment systems?
• What does a high level of noise pollution indicate about a power system?
• Which two categories of heat exchangers are commonly used?
• The stop and start system is best employed where:
• The hyperbolic cooling tower has the advantages of:
• What is the primary purpose of a pressure gauge?
• How does a cyclone separator contribute to environmental compliance in power plants?
• What is one of the major disadvantages of a gas turbine?
• In a two-stage refrigeration system, what is the first stage compressor called?
• In a boiler system, what is the role of control valves in relation to steam pressure?
• What is the main purpose of anti-icing systems in gas turbines?
• Routine maintenance on a gas turbine should involve checking for fuel leaks on a __________ basis.
• What is the role of solenoid gas staging systems in gas turbines?
• Water cooled surface condensers may be classified as:
• A method of unloading a reciprocating compressor is to:
• What is one key maintenance aspect required for gas turbines regarding fuel systems?
• What is the role of a superheater in a steam boiler?
• What effect does increasing steam pressure have on a steam turbine's efficiency?
• What substance do bacteria in activated sludge primarily feed on?
• What is one possible effect of inadequate feedwater treatment?
• What does the load factor indicate in power generation?
• In a thermal efficiency calculation, what factors are primarily compared?
• What is "flash steam" in relation to steam generation?
• What is the expected result of removing particulate matter from flue gases?
• What is the primary purpose of a cyclone separator in power plants?
• The most important component of a fuel metering system is?
• Why is it important to keep accurate logs in power engineering?
• What is a potential consequence of using anti-icing systems?
• What is a potential consequence of neglecting regular maintenance on steam boilers?
• What role does the compressor play in a gas turbine system?
• Turbine inlet air temperature affects which of the following?
• A condenser shell may be fitted with an expansion joint if the:
• Which of the following devices is not used to start a gas turbine?
• The classic material for water boxes has always been:
• What operational aspect is critical to maintaining steam temperature in a plant?
• What does the term "scaling" refer to in boiler operation?
• What is the purpose of a steam trap?
• What is the process of water wash typically achieved by?
• What is a primary cause of boiler tube failure?
• What is a primary component of a steam boiler?
• Which of the following is key for ensuring safety during steam equipment maintenance?
• Why is regular maintenance important for steam boilers?
• What is an important factor in ensuring the efficiency of a thermal system?
• What is the primary starting method for gas turbines at remote pipeline stations?
• In the context of gas turbines, what effect does reducing combustion temperature have?
• What is a common feature of a compact gas turbine design?
• What is specific heat capacity?
• What is an automatic control system in power engineering?
• The difference in enthalpy of ammonia as a fluid at saturation conditions at 1165.8 kPa abs and 236.2 kPa abs is found in the:
• What is the function of a turbine governor?
• Which of the following is necessary for the cooling and sealing function in a screw compressor?
• What is the purpose of a multi-stage flash distillation process?
• Which method of refrigeration is most commonly used?
• What is a potential consequence of not maintaining appropriate steam pressure?
• In energy recovery systems, what type of energy is primarily reused?
• What are some environmental regulations concerning power plant emissions?
• What are the implications of scaling in evaporating systems?
• What is a function of the steam drum in a boiler?
• What fluid is necessary in a package industrial screw compressor for cooling, lubricating, and sealing the rotors?
• Which type of compressor requires intake and discharge valves?
• What is meant by "boiler efficiency" in the context of power engineering?
• Reciprocating compressor valves are usually automatic and open and close by:
• What is a characteristic of the rotary vane compressor?
• Explain the function of a de-aerator.
• What type of condenser allows the feed pump to draw from the hot well only the quantity of feed water required by the boiler?
• What does "thermal efficiency" measure in a thermal system?
• What is one benefit of using a cooling system in gas turbines?
• What does the warm-up time of a turbine depend on?
• What type of control is essential to ensure safe operation in a cyclone separator?
• What is a disadvantage of using air in a surface condenser?
• What is the purpose of a pressure relief valve in a power system?
• Which of the following advantages are obtained from a gas turbine cycle using an intercooler?
• What are the advantages of gas turbines?
• Turbine rotor speed decreases during shutdown when which event occurs?
• How can overheating in boiler tubes be identified?
• In a multi stage, reciprocating compressor the highest pressure stages may be:
• The design of the HRSG in a cogeneration system depends on what factors?
• What is the main function of moving reaction turbine blades?
• What does the term "thermal efficiency" refer to in steam generation?
• What function does the steam turbine serve in a power plant?
• What does effective intercooling help to reduce in a compressor?
• What are some disadvantages of using a regenerator in a gas turbine cycle?
• How is reheat accomplished in a gas turbine?
• What is one advantage of using water injection systems in gas turbines?
• The main outcome of a gas turbine cleaning process is to?
• Why are there fewer turbine stages than compressor stages in a gas turbine?
• What is one consequence of the presence of scaling in boilers?
• What does "specific fuel consumption" refer to in power engineering?
• Suction pressure in refrigeration systems is managed by which component?
• What is the primary function of a hydraulic actuator in power engineering?
• What are the primary components of a steam boiler?
• What does an increase in turbine inlet air temperature do to turbine efficiency?
• A good method of removing moisture from air before it goes into the air receiver is to:
• Which characteristics of a gas turbine contribute to its advantages?
• What is the primary function of a condenser in power generation?
• What role do auxiliary systems play in power generation?
• What do turning gears require for operation?
• What component is installed to remove moisture and oil from compressed air?
• What is a benefit of using natural draft cooling towers?
• Which parameter is often used to assess the performance of a power plant boiler?
• Why are air quality control systems important in power plants?
• What is the primary function of an economizer in a thermal power plant?
• Which features are true of the Fixed Tube Sheet shell and tube exchanger?
• In a rotary lobe compressor, how is the second lobe driven?
• How is a function of the recycle valve critical to the compressor's performance?
• What is the role of insulation in a steam system?
• Why must heat exchangers in condensing heat recovery systems be resistant to corrosion?
• Why are separate lube oil systems recommended for aero-derivative turbines?
• What is one of the primary reasons for conducting a fuel analysis in power engineering?
• Which principle does a gas turbine rely upon for effective operation?
• What happens to the efficiency of an insulation material with a higher R-value?
• Where should pressure limiting devices be connected in a refrigeration system?
• How is "superheated steam" defined in power engineering?
• Which component is crucial for controlling the fuel flow in gas turbines?
• What is one of the main purposes of auxiliary systems in gas turbines?
• What does the term "energy recovery" refer to?
• What occurs when the bleed valves are fully open?
• What is the main function of a blowdown valve in a boiler system?
• What is the extraction pressure dependence in an extraction turbine?
• What is the purpose of conducting a fuel analysis?
• What is the reason for maintaining proper pH levels in boiler water?
• What is a disadvantage of using a low-side float control?
• Which two methods of heat transfer are primarily utilized in boilers?
• Define the term "combustion efficiency."
• What is the primary purpose of water treatment in boiler systems?
• The pressure at the outlet from the moving blades is the same as the pressure at the inlet to the moving blades in a/an __________ turbine.
• What type of fuel is primarily used in power generation boilers?
• Thrust bearings on dual shaft gas turbines are positioned:
• Which of the following methods helps in controlling emissions in power plants?
• What can happen if the water level in a boiler is too low?
• In a boiler system, what is "feedwater"?
• What does the "R-value" measure in insulation?
• How is cleaning typically performed on a gas turbine?
• What can be a consequence of inadequate ventilation on a boiler system?
• Refrigeration control can be achieved by regulating the flow of refrigerant to the evaporator and also by:
• What is the relationship between steam pressure and temperature in a power engineering context?
• What device is employed to convert steam energy into mechanical energy?
• Cogeneration systems with an IC engine connected to a HRWH can obtain good efficiency in _____ systems.
• Which of the following fuels is typically NOT used in combustion systems?
• In a gas turbine, the production of which compound is reduced by water injection systems?
• What role does lubrication play in mechanical systems?
• Why is the air intake duct mounted above the gas turbine enclosure?
• When does the loading of a gas turbine typically begin?
• What is the significance of blowdown in a boiler?
• What is a pressure relief valve designed to do in a system?
• What does the term "flash point" refer to in relation to fuels?
• The process of converting collected water from a boiler system into steam is known as?
• Reciprocating compressor connecting rods are constructed of:
• What safety protocol should be followed during maintenance on high-pressure steam equipment?
• The advantages of a dual shaft gas turbine arrangement are:
• What are two types of cooling towers?
• What is the function of a water cooler in a power plant?
• Why is monitoring temperature and pressure important in boilers?
• When should the cooling water to the oil cooler be turned on during the startup of a large condensing turbine?
• Why is it important to control the particulate matter in flue gases?
• What is the purpose of a flue gas analyzer in power engineering?
• What is a typical maintenance activity for a boiler?
• How are inlet air temperatures to gas turbines typically reduced?
• Most aero derivative turbines lube oil systems require?