Q632 - Gas Turbine Plants, USCG prep certification 2026

Progress: 24% (23/94)

Learning progress ?

1. The term "divergent" is best described as which of the following?Not learned 2. Which of the following terms refers to axial compressor stator blades?Not learned 3. What are the two common forms of axial compressor rotor blade roots?Not learned 4. Which of the following conditions permits a gas turbine to produce 100% power?Not learned 5. How do the high-velocity high-temperature gases cause the gas turbine rotor to rotate?Not learned 6. In a gas turbine, the air charge is permitted to be compressed adiabatically by what factor, process, or condition?Not learned 7. A gas turbine engine in which exhaust gas heat energy is added to the air charge between the compressor and combustion chamber is classified as which of the following?Not learned 8. Which of the following is an advantage of a single-shaft gas turbine engine compared to a split-shaft gas turbine engine?Not learned 9. In a twin-spool turbine, secondary air is most essential for cooling in what section?Not learned 10. What type of air seal is used in the sump and turbine areas of a gas turbine engine?Not learned 11. What type of air seal is used in the combustor and turbine midframe of a gas turbine?Not learned 12. What type of starter is commonly used on smaller gas turbine engines?Not learned 13. What type of main reduction gear arrangement prevents independent axial and rotational movement of the pinions?Not learned 14. What feature is commonly used on articulated reduction gear arrangements for the correction of misalignment between the 1st reduction gear and the 2nd reduction pinions?Not learned 15. What does the term "lock-out" of a synchro-self-shifting (SSS) clutch system meanNot learned 16. Where are the carbon dioxide nozzles located in the GE LM2500 gas turbine enclosure?Not learned 17. The struts of the GE LM2500 compressor front frame provide passages for all of the following mediums EXCEPT which of the following?Not learned 18. What is the primary purpose of the diffuser and distributor on the GE LM2500 gas turbine?Not learned 19. Which of the following components prevent(s) objects smaller than 1/4 inch from entering the GE LM2500 gas turbine?Not learned 20. How is the HP turbine rotor of the GE LM2500 gas turbine cooled?Not learned 21. For the GE LM2500 gas turbine shown in the illustration, the 9th stage bleed air is used for which of the followingNot learned 22. Aboard ship, single-shaft gas turbines are used mostly as prime movers for which of the following applications?Not learned 23. Accelerating the compressor to the self-sustaining speed of the engine is the function of which of the following components?Not learned 24. Which of the following components removes the oil from the transfer gearbox?Not learned 25. What is the approximate percentage of air extracted from the compressor that is mixed with fuel for combustion in a gas turbine?Not learned 26. What is the power source for the ignition exciter of a gas turbine engine?Not learned 27. In the ignition system of a gas turbine engine, how is optimum spark achieved?Not learned 28. What is the most common type of spark igniter used on a gas turbine engine?Not learned 29. What is the purpose of the Controllable-Pitch Propeller (CPP) hydraulic oil power system?Not learned 30. You are on watch on a gas turbine propelled vessel as shown in the illustration. After reducing power in response to a high lube oil supply temperature alarm, the temperature continues to increase. Your next step should be which of the followingNot learned 31. On a ship with a marine gas turbine as shown in the illustration, a fire emergency stop is initiated when __________Not learned 32. The two main types of compressor stall are known as what?Not learned 33. In order to get a ready indication for a normal start with a GE LM2500 gas turbine engine, what permissive(s) must be met?Not learned 34. A pressure stage of an axial-type compressor consists of which of the following?Not learned 35. A centrifugal flow gas turbine uses what type of combustion chamber?Not learned 36. The purpose of the metal spray rub coating on the rotor and stator casing of an axial-type compressor is which of the following?Not learned 37. Marine GTE fuel oil systems, as shown in the illustration, require fuel oil shutdown valves to be _________Not learned 38. What is the purpose of the spring in a lip-type oil seal?Not learned 39. What is the purpose of the air/oil separator shown in the illustration of the gas turbine lube oil systemNot learned 40. The lube oil scavenge pressure on the gas turbine engine shown in the illustration is sensed by which of the followingNot learned 41. A gas turbine engine's main lube oil system pump check valve serves to maintain system prime and perform what other function?Not learned 42. How is the lube oil supplied to each bearing in a gas turbine engine controlled?Not learned 43. The main lubrication system utilized by the gas turbine engine shown in the illustration is what typeNot learned 44. If the lube oil scavenge temperature exceeds 300 degrees Fahrenheit on the gas turbine engine shown in the illustration, and reducing power does NOT bring the temperature within limits, the operator should do which of the followingNot learned 45. In a gas turbine propulsion installation, the typical control system is designed to perform which of the following three functions?Not learned 46. Wrenches that are recommended for use on gas turbine engines should be plated with which of the following elements?Not learned 47. Which of the following instruments is designed to help you when performing an internal inspection of the gas turbine engine?Not learned 48. All clock positions, engine references, and enclosure references apply to viewing the gas turbine engine shown in the illustration, from which of the following locationsNot learned 49. Routine water washing of the gas turbine compressor shown in the illustration, is usually performed while operating under which of the following conditionsNot learned 50. Accelerometers are generally used on gas turbine engines to sense which of the following?Not learned 51. According to the gas turbine engine illustration shown, the areas labeled "14 thru 29" are locations for _______Not learned 52. The acronym CDP stands for which of the following?Not learned 53. The acronym FOD stands for which of the following?Not learned 54. The acronym MFC represents which of the following?Not learned 55. The acronym VSV represents which of the following?Not learned 56. While air is being compressed in a centrifugal flow gas turbine, what happens to the direction of air flow?Not learned 57. Air used to cool the combustion liners and turbine components is referred to as which of the following?Not learned 58. Assuming at least a 500 rpm for the input shaft speed from the power turbine, as shown in the illustration, the synchronous self-shifting (SSS) clutch used on marine gas turbine main propulsion gears, requires which of the following inputs or conditions to make engagement possibleNot learned 59. During an auto-start sequence on the marine gas turbine control console shown in the illustration, what would be the correct order of events required to occur after the start sequence beginsNot learned 60. An axial compressor basically consists of which of the following?Not learned 61. An axial compressor stage is represented by which of the following components and in which order?Not learned 62. An axial compressor stator vane that is mechanically adjusted to provide optimum compressor performance over a wide operating range is referred to as which of the following?Not learned 63. The bleed air surge relief valve differs from a normal relief valve in which of the following ways?Not learned 64. Borescope inspection of the combustor section requires which type of light source?Not learned 65. A centrifugal compressor assembly consists of which of the following?Not learned 66. The circle of turbine stationary vanes that convert pressure and thermal energy to velocity energy and direct the combustion gases in the direction of turbine wheel rotation is referred to as what?Not learned 67. How is the clutch shown in the attached illustration engagedNot learned 68. Compressor characteristics are normally summarized in the form of which of the following?Not learned 69. What is a compressor midspan shroud?Not learned 70. Compressor surge is caused by which of the following factors?Not learned 71. When conducting a borescope inspection, you must be aware of all of the following factors EXCEPT which?Not learned 72. Why is the cycle efficiency higher in the intercooled-recuperated cycle as compared to a simple cycle gas turbineNot learned 73. The electrostatic vent fog precipitator removes oil mist from which of the following areas?Not learned 74. Which of the following could cause compressor stall?Not learned 75. Which of the following is the definition of absolute temperature?Not learned 76. Which of the following designs is the most satisfactory method for attaching turbine blades to the rotor disk?Not learned 77. Which of the following is NOT a gas turbine auto shutdown parameter?Not learned 78. Which of the following is the main advantage of a split-axial compressor case?Not learned 79. Which of the following are the principle factors that affect the performance of a gas turbine compressor?Not learned 80. Which of the following is the principle that a magnetic speed sensor/pickup operates on?Not learned 81. Which of the following statements concerning fluid flow is true?Not learned 82. Which of the following statements correctly describes force?Not learned 83. Which of the following statements is true concerning axial compressor disk-type rotors?Not learned 84. Which of the following statements is true regarding centrifugal compressors?Not learned 85. Which of the following terms refers to thermal energy in transition?Not learned 86. Which of the following wrenches should NOT be used while working on a gas turbine?Not learned 87. In a gas turbine engine, the majority of the energy is added to the working fluid in which of the following components?Not learned 88. For the GE LM2500 gas turbine engine shown in the illustration, the HP turbine 1st stage nozzle vanes are cooled by which of the followingNot learned 89. Most GTE fuel nozzles have passages for all of the following except ____________.Not learned 90. The only hand tools that should be used on gas turbine engines are chrome plated, nickel plated, or which of the following?Not learned 91. HP turbine blades are generally cooled by which of the following methods?Not learned 92. To keep the exit pressures relatively constant across a HP turbine blade, which type of construction is generally utilized?Not learned 93. Kelvin is the absolute temperature scale that corresponds to which of the following?Not learned 94. The lube oil system shown in the illustration, consists of which of the following sub-systemsNot learned 95. The lube oil system shown in the illustration, is designed to lubricate the main bearings by what principleNot learned 96. A magnet pickup typically produces what type of signal output?Not learned 97. How do you manually lockout an SSS clutch?Not learned 98. What method is utilized to allow turbine nozzle blades to withstand high inlet temperatures?Not learned 99. Newton's First Law of Motion states which of the following?Not learned 100. Newton's Second Law of Motion states which of the following?Not learned 101. Newton's Third Law of Motion states which of the following?Not learned 102. In the operation of a marine propulsion gas turbine, kinetic and thermal energy required to drive the main propeller shaft are extracted by which of the following?Not learned 103. Potential energy is defined as which of the following?Not learned 104. Power is defined as which of the following?Not learned 105. You are preparing for a borescope inspection of an LM2500 gas turbine engine. You are reviewing the correct geometric orientation nomenclature which includes which of the following?Not learned 106. Rankine is the temperature scale that corresponds to which of the following?Not learned 107. Rotation of the controllable-pitch propeller (CPP) blades is achieved through axial movement of what component in the hub body assembly?Not learned 108. As shown in the illustration of a gas turbine fuel oil system, when the engine fuel oil valves are de-energized, the remaining fuel left in the system is recirculated back to which of the followingNot learned 109. As shown in the illustration, what is the purpose of pressurizing the main bearing lube oil sumps on a typical marine gas turbineNot learned 110. In a single shaft, cold-end drive gas turbine, the power output speed has what relationship to the speed of the compressor?Not learned 111. The six borescope ports located in the compressor rear frame casing of the marine propulsion gas turbine shown, can be used to inspect all EXCEPT which of the following componentsNot learned 112. What is the term given to the condition in which cyclic pressure changes result in a repetitive failure and recovery of compressor air flow?Not learned 113. What is the term given to a process that occurs without a loss or gain of heat?Not learned 114. What is the term used to describe the stationary vanes preceding the first stage of an axial compressor?Not learned 115. The thermal energy added to the gas as it flows through the combustion section has what effect on the gas?Not learned 116. Thermal energy is the only form of energy that can be added to or removed from a substance. How is thermal energy that is added to a substance stored?Not learned 117. The three most common types of combustors used in gas turbine engines are which of the following?Not learned 118. The turbine nozzle blades convert the combustion gases heat and pressure energy into what form of energy?Not learned 119. A turbine stage is represented by which of the following components and in which order?Not learned 120. Two functions of the compressor stator vanes include which of the following?Not learned 121. What are the two primary sources of deposits that build up on compressor blades?Not learned 122. What are the two principal functions of the turbine nozzle guide vanes?Not learned 123. What type of engine starter motor is commonly found on the marine gas turbine shown in the illustrationNot learned 124. On a vessel equipped with marine propulsion gas turbines, the operator’s initial response to a high vibration alarm should be which of the following?Not learned 125. For the GE LM2500 gas turbine engine shown in the illustration, the 13th stage bleed air is used for which of the followingNot learned 126. On a vessel equipped with marine propulsion gas turbines, the operator's initial response to a high vibration alarm should be which of the following?Not learned