Gas Turbine Systems Technician – Electrical (GSE) A Test 1 Practice

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• What is the role of rotor excitation in a synchronous generator and how does it influence generated voltage?
• TIT stands for Turbine Inlet Temperature. Why is TIT monitored?
• If the turbine does not accelerate after starting, what could be the likely causes?
• What type of towers are used in Type 2 LPACS?
• Which statement best describes the difference between a thermocouple and an RTD as temperature sensing devices?
• What tool is used to insert and extract pins from cannon plugs?
• Which protection device detects a ground fault on a distribution circuit?
• Before applying test voltage during insulation resistance testing, which action must be performed?
• What is the primary function of a transformer in a power distribution system?
• Which of the following ways can the blow in door for the SSGTG be operated?
• Galvanic corrosion occurs due to what condition?
• Which device senses displacement through a capacitor formed by two plates?
• What could be a consequence of over-tightening electrical connectors and lugs?
• Which component or type of dehydrator is designated for HPAC?
• What would you observe if a single phase is open in a three-phase system?
• Which expression gives the three-phase output power P in terms of line voltage V_LL, line current I_L, and power factor pf?
• What is a megohmmeter used to measure?
• How many thermocouples are in GTG?
• What is the function of an ignition exciter in turbine engines?
• What happens if a three-phase motor loses one phase (single-phasing), and what protection is typically used?
• What is a bus bar in electrical power distribution and what is its typical purpose?
• What is short-circuit current, and how do protective devices respond?
• What is the difference between a soft starter and a variable frequency drive (VFD) when starting an induction motor?
• What are the key responsibilities of a GSE Electrician regarding hot work around turbine equipment?
• What is an arc flash hazard, and how is risk mitigated on GSE panels?
• Which thermocouple pair forms the two-metal circuit used in GTG?
• In turbine engines, what does EGT/TIT indicate and why is it critical for operation?
• Which basic measurement on a digital multimeter is used to check for a complete path between two points in a circuit?
• The halon activation time delay is expressed in seconds. Which value is correct?
• In turbine electrical systems, what type of sensor typically provides N1/N2 speed signals?
• Which statement best reflects the role of load shedding in turbine electrical systems?
• During insulation resistance testing with a megohmmeter, the resistance reading is expressed in which unit?
• Explain the function of an overload relay in a motor starter.
• How many wires are enclosed inside the chromel-alumel rated assembly?
• Which thermocouple is described as the military type?
• What is the correct sequence for synchronizing a synchronous generator with a bus?
• Which temperature sensing device generally offers higher accuracy?
• In an ideal transformer, how are V_out and I_out related to V_in and I_in with respect to turns N_primary and N_secondary?
• Time delay for new relays for the blow-in doors?
• What is a common name for contractors in electrical systems?
• When securing a cannon plug we use
• What is the distance threshold for cable runs before using a strap?
• The membrane is made up of what?
• What happens to the output of a synchronous generator if field excitation is removed?
• What is the purpose of earth grounding in the testing environment to protect ESD-sensitive components?
• What is the effect of unbalanced phase voltages on a three-phase motor or generator?
• Which device is typically used to isolate energy sources during maintenance?
• During a megger test at 500 V DC, what does a high insulation resistance indicate?
• Which of the following is a factor to consider when lock-wiring a connector?
• Which of the following describes a valid way to open the SSGTG blow-in door?
• What is the function of a pilot relay or interlock in control circuits?
• Define power factor and explain why improving it reduces losses in a shipboard electrical system.
• Which practice is essential before insulation resistance testing on live equipment?
• What type of towers are used in Type Two LPADS?
• Which statement best describes the purpose of a megger insulation resistance test at high DC voltage?
• Crevice corrosion occurs between surfaces of what?
• In an induction motor, what is slip?
• What does cold-cranking amps (CCA) measure in a starting battery?
• How long must the push button be pressed to open the blow-in door?
• Which devices detect ground faults by sensing imbalance between currents?
• What is reactive power in an electrical system?
• How can you verify N1/N2 speed readings for turbine equipment?
• What is the function of a brushless exciter in a synchronous generator?
• What is the primary reason TIT is monitored in turbine operation?
• Define arc flash and name two protective measures to reduce risk.
• Which of the following is a factor to consider when lock-wiring a connector?
• What voltage is settled down to in the controller?
• When towers in type two LPAD are lined in parallel, what happens?
• Which statement describes how capacitor impedance changes with frequency?
• What is the maximum cable run length before using a strap?
• Which statement correctly differentiates indirect sight glasses from direct sight glasses?
• Which statement correctly describes how fuses and circuit breakers differ in maintenance?
• What is the primary purpose of compressed air dehydrators for LP and HP compressed air?
• What happens to a resistance strain gauge transducer when the tension is increased
• What is the halon activation time delay?
• Where is the blow-in door control panel located in relation to the blow-in door?
• What are the expressions for inductive reactance X_L and capacitive reactance X_C in AC circuits?
• Flame arrestor purpose
• For a sinusoidal AC voltage, the peak value equals the RMS value multiplied by what factor?
• What component causes the valve to shut down when the limit switch is activated?
• How is a three-phase voltmeter connected to measure line-to-line voltage in a Wye-connected system?
• Which statement best differentiates an isolator switch from a circuit breaker?
• What does a residual current device (RCD) detect in an electrical system?
• What separates the oil air mist?
• Type of thermocouple described as military type
• Vacuum pressure is defined as
• What temperature is set for the switch for the blow in door heater?
• What primarily causes torque in a three-phase AC induction motor?
• Which statement best describes the purpose of insulation testing during commissioning?
• What electrical symptom most directly indicates a motor overheating due to electrical issues?
• Which term describes a cannon plug assembled from two halves?
• What condition does a TLI sound alarm indicate?
• What is impedance mismatch and how can it affect measurements?
• What is a bus duct, and what is its purpose in a distribution system?
• Which equation shows the relation for V_out in an ideal transformer given V_in and turns?
• What is the first action if you detect smoke or an electrical fire in the turbine area?
• What instrument is used to measure insulation resistance in turbine windings during post-maintenance testing?
• What does a transformer tap changer achieve?
• In a measurement system, which component ionizes to separate oil from air mist?
• What is a contactor and what role does it play in engine electrical start/stop circuits?
• Switches are designed to be used only for high current conditions. Which statement is correct?
• What is the difference between equipment grounding and bonding?
• What is the purpose of equipment grounding and bonding in electrical systems?
• In a balanced three-phase system with line voltage V_L and line current I_L, which formula gives apparent power S?
• During maintenance, how long can you leave conductors undone?
• Using a digital multimeter, which basic measurements can you obtain to diagnose electrical health?
• Crevice corrosion occurs between surfaces composed of what relation?
• In a relay, what component is responsible for pulling the contacts when energized?
• If the igniter fails to ignite, what is the likely result?
• What is the purpose of an overcurrent relay?
• What condition triggers automatic opening of the blow-in door?
• Cannon plug consists of two parts?
• Which parameter do tank level indicators primarily display?
• Why might a delta connection be used in a three-phase transformer, and what is a key characteristic?
• Describe a typical insulation resistance test procedure for a turbine generator after maintenance.
• In a pyrometer, which component is the actual temperature sensing element?
• Which of the following is NOT typically found in a motor control center (MCC)?
• What three parameters must be matched to synchronize a generator to a running bus?
• Which coating is used to protect equipment from corrosion?
• In differential protection, which of the following best describes its primary action?
• What step comes immediately after applying lockout devices in the lockout/tagout sequence?
• Name two protective relays used on generator systems and their purpose?
• How would you determine the acceptable range for N1 speed during start and operation?
• Which statement is true about an inductor's impedance in AC circuits?
• Which of the following is typically the first step in the starting sequence for a gas turbine electrical starting system?
• Why is it essential to read electrical schematics and wiring diagrams before performing maintenance?
• What tool is used to insert and extract pins from cannon plugs?
• Which statement best describes how a residual current device protects people?
• What is the risk of hydrogen buildup during charging and how is it mitigated?
• What is the purpose of a pickup and dropout in protective relays?
• How is transformer impedance typically expressed, and why is it important for fault calculations?
• Which device uses a capacitor formed between two plates to sense changes in capacitance?
• In a star-connected three-phase system, what is the function of the neutral conductor?
• How does an automatic voltage regulator (AVR) maintain generator output voltage?
• How many functions are performed for the fire actuation system?
• For a 60 Hz AC voltage with 120 V RMS, what are the peak value and phasor representation?
• What is the first step in a lockout/tagout sequence?
• Which of the following is NOT a method to open the blow-in door?
• If both line voltage V_L and line current I_L are doubled in a balanced three-phase system, what happens to the apparent power S?
• What is differential protection, and where is it commonly used?
• In a delta-connected transformer, what is a defining feature regarding neutral and fault tolerance?
• What does LOTO stand for in electrical safety, and why is it used?
• Differentiate between continuity testing and insulation resistance testing.
• What is the purpose of interlock circuits in turbine engine electrical systems?
• What provides the means to operate a valve?
• In a phasor representation, what does choosing the reference angle as 0° imply?
• If you observe a phase voltage drop while another phase is normal, what fault is most likely?
• Which of the following is an example of a transducer used in turbine instrumentation?
• What is the function of a motor starter coil in a control circuit?
• What is a star (wye) connection in three-phase systems, and how does it relate to line and phase voltages?
• What does gray epoxy coating indicate in terms of protection?
• Outline the basic steps of a lockout/tagout sequence prior to maintenance.
• Why is impedance matching important for instrumentation signals?
• How is a ground fault typically detected in turbine electrical systems?
• Which fault is described as a short circuit between two live conductors?
• What type of device is commonly used to sense turbine speed electronically?
• Name two safety practices that should be completed before performing electrical maintenance on equipment.
• Why is a torque specification important when tightening electrical connectors and lugs?
• Which method can automatically open the blow-in door?
• The controller reduces supply from 440 VAC to what voltage?
• How do an inductor and a capacitor individually respond to an AC signal in terms of impedance?
• What is load shedding and when would it be used on turbine electrical systems?
• Which statement about the blow-in door control panel is true?
• How can the blow-in door for the SSGTG be operated?
• What is the role of a tachometer in turbine systems?
• If interlock conditions are not satisfied, what is the risk in turbine engine start sequences?
• What is the function of the DC bus in starting circuits?
• The four digits on a cannon plug designation code indicate what?
• Why is maintenance documentation critical in GSE electrical systems?
• Which of the following best describes the relationship between maintenance documentation and troubleshooting?
• When working on engine electrical systems, what does PPE stand for and which two items are essential PPE?
• What type of heat exchanger or cooler medium is used in the condenser filter?
• Which component in an MCC protects motors from overheating by opening the circuit when current exceeds a set value?
• A voltage divider is used to scale signals for instrumentation. Which statement is true?
• How do fuses differ from circuit breakers?
• If transformer impedance is very low, what happens to fault current levels on the protected bus?
• For the primary halon activator system, how many functions are there?
• When a relay is actuated, which component pulls the contact down?
• The delay period for new relays for the blow-in doors is designed to accommodate fluctuations in what parameter?
• Which faults are common in three-phase electrical systems?
• In an ideal transformer, if the primary turns exceed the secondary turns, how does V_out compare to V_in?
• If a panel shows consistently high resistance across a bus, what is a prudent first electrical check?
• Where else can the GTE fire suppression system be actuated?
• What is the primary purpose of tank level indicators in a storage system?
• Why are three-phase systems preferred for heavy loads?
• What is a power factor correction capacitor bank, and why is it used?
• Which function is NOT a function of the primary halon activator system?
• Why is color coding important in turbine electrical wiring and what does the typical color code indicate?
• Galvanic corrosion occurs when there is contact between metals of what relation?
• Where are the blow in door control panels located?
• If the line voltage V_LL is 480 V, line current I_L is 20 A, and pf is 0.8, what is the three-phase output power P?
• When a cannon plug is separated into assemblies
• What temperature is the overheater set at?
• Which expression correctly relates voltage, current, and resistance in Ohm's law?
• How does a voltage divider work, and where might it be used in instrumentation?
• Where do you check cable for continuity?
• What safety precautions must be observed before performing insulation resistance testing on live equipment?
• Which term describes the half-shell construction of a cannon plug?
• What is NFPA 70E, and why is it important to GSE technicians?
• What does RTD stand for, and what is its basic operating principle?
• Oil fog vented into the machinery space can cause which hazards?
• Which device helps prevent equipment damage by detecting imbalance between live conductors and earth?
• Why is proper grounding essential in shipboard electrical systems?
• What safety precautions are essential when using a megohmmeter on de-energized equipment?
• If impedance is not matched in instrumentation, what is the most likely outcome?
• How long can conductors be left undone during cannon plug maintenance?
• Which device produces a decrease in output signal from an increase in input signal?
• The primary function of an overcurrent relay is?
• What is the purpose of a braking resistor in DC drive or regenerative braking system?
• What is the primary purpose of a circuit breaker in electrical systems?
• The blow-in door heater switch is set to which temperature?
• In an AC circuit with resistance R, inductive reactance X_L, and capacitive reactance X_C, what is the formula for the total impedance Z?
• Which method opens the blow-in door manually?
• What happens to insulation resistance when moisture is added?
• If oil fog is vented out to the machinery space, what risk is created?
• Why is calibration of instruments important and what is a typical procedure?
• Which best describes the location of the blow-in door control panels?
• What are the two types of corrosion?
• Which feature distinguishes indirect sight glasses from direct sight glasses?
• What does insulation resistance measure and how is it tested with a megohmmeter?
• Why is insulation resistance testing (megger testing) performed during commissioning?
• Differentiate between a step-down transformer and a step-up transformer in terms of winding turns and voltage.
• What is the effect on insulation resistance when moisture is introduced?
• Which statement best describes the brushless exciter configuration in a synchronous generator?
• When VFP cleans air, where does the air go?
• Relays are also commonly referred to as which of the following?
• Which two metals form the thermocouple pair mentioned?
• What is essential when selecting protection device settings to ensure selective coordination?
• Synchronous speed in a three-phase induction motor refers to the speed of the stator's rotating magnetic field. Which statement is true?
• Three things that make up a pyrometer
• If inductive reactance equals capacitive reactance (X_L = X_C) in an AC circuit, what is the nature of the impedance Z?
• What is surface leakage and how can it be minimized on turbine enclosures?
• What is the purpose of a contactor in motor control circuits?
• How many UV flame detectors are in a gTG?
• How many thermocouples are included in GTG?
• What is the practical purpose of a power factor correction capacitor bank in a distribution feeder?
• What does a transformer tap changer do?
• Which device has the characteristic of decreasing output as input increases?
• What is the purpose of establishing an earth ground in a testing area?
• What could happen in generator operation if a branch in the electrical system is open while others are healthy?