Q533 - Gas Turbine Plants, USCG prep certification 2026

Progress: 24% (23/94)

Learning progress ?

1. Compared to other types of engines, what is the biggest advantage of a gas turbine engine?Not learned 2. The term "divergent" is best described as which of the following?Not learned 3. Which of the following terms refers to axial compressor stator blades?Not learned 4. What are the two common forms of axial compressor rotor blade roots?Not learned 5. Which of the following conditions permits a gas turbine to produce 100% power?Not learned 6. How do the high-velocity high-temperature gases cause the gas turbine rotor to rotate?Not learned 7. In a gas turbine, the air charge is permitted to be compressed adiabatically by what factor, process, or condition?Not learned 8. The Brayton Cycle is a series of events best described by which of the following statements?Not learned 9. 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 10. Before combustion can occur, the combustion air must be delivered to the combustor at a high-pressure and low-velocity. High-velocity, low-pressure air is converted to high-pressure, low-velocity air at what part of a centrifugal type compressor?Not learned 11. Which of the following is an advantage of a single-shaft gas turbine engine compared to a split-shaft gas turbine engine?Not learned 12. In a twin-spool turbine, secondary air is most essential for cooling in what section?Not learned 13. What type of air seal is used in the sump and turbine areas of a gas turbine engine?Not learned 14. What type of air seal is used in the combustor and turbine midframe of a gas turbine?Not learned 15. What type of seal is used in the gearbox of a gas turbine engine?Not learned 16. Ball or roller antifriction bearings are used to support GTE rotors for all EXCEPT which of the following?Not learned 17. What type of starter is commonly used on smaller gas turbine engines?Not learned 18. The main thrust bearing directly positions which part(s) of the main reduction gear?Not learned 19. What type of main reduction gear arrangement prevents independent axial and rotational movement of the pinions?Not learned 20. The purpose of the main reduction gear in a marine gas turbine propulsion installation is which of the following?Not learned 21. 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 22. What does the term "lock-out" of a synchro-self-shifting (SSS) clutch system meanNot learned 23. How many shock mounts are used to secure the GE LM2500 gas turbine enclosure to the ship's foundation?Not learned 24. Where are the carbon dioxide nozzles located in the GE LM2500 gas turbine enclosure?Not learned 25. The gas generator section of the GE LM2500 gas turbine is composed of all of the following components EXCEPT which of the following?Not learned 26. The struts of the GE LM2500 compressor front frame provide passages for all of the following mediums EXCEPT which of the following?Not learned 27. What is the primary purpose of the diffuser and distributor on the GE LM2500 gas turbine?Not learned 28. Which of the following components prevent(s) objects smaller than 1/4 inch from entering the GE LM2500 gas turbine?Not learned 29. How is the HP turbine rotor of the GE LM2500 gas turbine cooled?Not learned 30. For the GE LM2500 gas turbine shown in the illustration, the 9th stage bleed air is used for which of the followingNot learned 31. As shown in the illustration, the HP turbine 2nd stage blades are cooled by convection, with the cooling air being discharged at which of the followingNot learned 32. Aboard ship, single-shaft gas turbines are used mostly as prime movers for which of the following applications?Not learned 33. Accelerating the compressor to the self-sustaining speed of the engine is the function of which of the following components?Not learned 34. Which of the following components removes the oil from the transfer gearbox?Not learned 35. On the marine gas turbine engine shown in the illustration, the 8th stage bleed air is used for which of the followingNot learned 36. What is the approximate percentage of air extracted from the compressor that is mixed with fuel for combustion in a gas turbine?Not learned 37. What is the power source for the ignition exciter of a gas turbine engine?Not learned 38. In the ignition system of a gas turbine engine, how is optimum spark achieved?Not learned 39. What is the most common type of spark igniter used on a gas turbine engine?Not learned 40. What is the purpose of the Controllable-Pitch Propeller (CPP) hydraulic oil power system?Not learned 41. On a propulsion marine gas turbine, if full power temperatures become excessive, what action should the operator take?Not learned 42. On a ship with a marine gas turbine as shown in the illustration, a fire emergency stop is initiated when __________Not learned 43. The two main types of compressor stall are known as what?Not learned 44. 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 45. A pressure stage of an axial-type compressor consists of which of the following?Not learned 46. Why are loose-fitting blades used on the first several stages of large axial compressors?Not learned 47. What is the disadvantage of a dual-entry centrifugal compressor compared to a single-entry centrifugal compressor?Not learned 48. Each stage of an axial compressor of a gas turbine can compress the atmospheric air a total of how many times?Not learned 49. A centrifugal flow gas turbine uses what type of combustion chamber?Not learned 50. The short length of the can-annular combustion chamber provides for which of the following conditions?Not learned 51. What type of combustor is used by the GE LM2500 gas turbine engine?Not learned 52. 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 53. What is the function of the stator in an axial gas turbine compressor?Not learned 54. The turbine nozzle blades convert the combustion gases heat and pressure energy into what form of energy?Not learned 55. The turbine nozzles function to direct the gases in what direction?Not learned 56. The fuel oil system of a gas turbine engine provides all EXCEPT which of the following?Not learned 57. Which of the following statements is true concerning the fuel oil ignition system of the gas turbine engine shown in the illustrationNot learned 58. Marine GTE fuel oil systems, as shown in the illustration, require fuel oil shutdown valves to be _________Not learned 59. What is the purpose of the spring in a lip-type oil seal?Not learned 60. What is the purpose of the air/oil separator shown in the illustration of the gas turbine lube oil systemNot learned 61. For the gas turbine engine lube oil system shown in the illustration, what is the purpose of the lube oil supply check valvesNot learned 62. The lube oil scavenge pressure on the gas turbine engine shown in the illustration is sensed by which of the followingNot learned 63. A gas turbine engine's main lube oil system pump check valve serves to maintain system prime and perform what other function?Not learned 64. How is the lube oil supplied to each bearing in a gas turbine engine controlled?Not learned 65. On the gas turbine lube oil system shown in the illustration, air and oil are primarily separated in the air/oil separator through the use of which of the followingNot learned 66. The main lubrication system utilized by the gas turbine engine shown in the illustration is what typeNot learned 67. 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 68. The lubrication principal utilized by the Kingsbury thrust bearing is which of the following?Not learned 69. When working with gas turbine synthetic lube oil, which of the following safety measures should always be observed?Not learned 70. When auto-starting a gas turbine engine similar to the one shown in the illustration, a "False Start" indication will initiate if which of the following conditions occursNot learned 71. In a gas turbine propulsion installation, the typical control system is designed to perform which of the following three functions?Not learned 72. What is the primary function of the main fuel control on the GE LM2500 gas turbine engine?Not learned 73. Wrenches that are recommended for use on gas turbine engines should be plated with which of the following elements?Not learned 74. Which of the following instruments is designed to help you when performing an internal inspection of the gas turbine engine?Not learned 75. 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 76. Routine water washing of the gas turbine compressor shown in the illustration, is usually performed while operating under which of the following conditionsNot learned 77. When removing the marine gas turbine engine as shown in the illustration, how is the engine removal accomplishedNot learned 78. On a GE LM2500 gas turbine powered vessel you are conducting a borescope inspection of the compressor. What is used on each compressor stage as a reference for indexing the blades?Not learned 79. A variable capacity, pressure atomizing, fuel oil burner functions to __________.Not learned 80. Which of the following statements describes how the fuel oil enters the whirling chambers of the sprayer plates used in an auxiliary boiler return flow fuel oil system?Not learned 81. The purpose of the separating nozzle in the accumulator of a water-tube, coil-type, steam generator is to separate __________.Not learned 82. Large steam drums are not required in the design of a coil-type auxiliary water-tube boiler because __________.Not learned 83. Which of the following statements concerning fire-tube boilers is correct?Not learned 84. The rate of heat transfer in a water-tube auxiliary boiler can be increased by __________.Not learned 85. Downcomers installed on auxiliary package boilers are protected from direct contact with hot gases by __________.Not learned 86. Fusible plugs are installed in fire-tube boilers to ________.Not learned 87. Accelerometers are generally used on gas turbine engines to sense which of the following?Not learned 88. According to the gas turbine engine illustration shown, the areas labeled "14 thru 29" are locations for _______Not learned 89. The acronym CDP stands for which of the following?Not learned 90. The acronym FOD stands for which of the following?Not learned 91. The acronym GG represents which of the following?Not learned 92. The acronym MFC represents which of the following?Not learned 93. The acronym VSV represents which of the following?Not learned 94. While air is being compressed in a centrifugal flow gas turbine, what happens to the direction of air flow?Not learned 95. Air used to cool the combustion liners and turbine components is referred to as which of the following?Not learned 96. 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 97. 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 98. An axial compressor basically consists of which of the following?Not learned 99. An axial compressor stage is represented by which of the following components and in which order?Not learned 100. 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 101. The bleed air surge relief valve differs from a normal relief valve in which of the following ways?Not learned 102. The boiler shown in the illustration would be classed as __________Not learned 103. Borescope inspection of the combustor section requires which type of light source?Not learned 104. A centrifugal compressor assembly consists of which of the following?Not learned 105. In a centrifugal compressor, which component reduces the velocity and increases the static pressure of the air?Not learned 106. 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 107. How is the clutch shown in the attached illustration engagedNot learned 108. In comparing a centrifugal-type to an axial-type compressor, which of the following statements is true?Not learned 109. Compressor characteristics are normally summarized in the form of which of the following?Not learned 110. What is a compressor midspan shroud?Not learned 111. A compressor is operating at an inlet pressure of 14.7 (atmospheric pressure at the time of measurement) and a compressor discharge pressure of 123 psig. Calculate the absolute pressure ratio across the compressor.Not learned 112. When a compressor is in a stall condition, what will happen to the combustor and turbine temperatures?Not learned 113. How can compressor stall be prevented?Not learned 114. Compressor surge is caused by which of the following factors?Not learned 115. When conducting a borescope inspection, you must be aware of all of the following factors EXCEPT which?Not learned 116. Why is the cycle efficiency higher in the intercooled-recuperated cycle as compared to a simple cycle gas turbineNot learned 117. What is the difference between an open cycle and a closed cycle gas turbine engine?Not learned 118. Displacement, velocity and acceleration describe three types of which of the following?Not learned 119. The divergent area of the exhaust duct aids in what process?Not learned 120. The electrostatic vent fog precipitator removes oil mist from which of the following areas?Not learned 121. Which of the following could cause compressor stall?Not learned 122. Which of the following is the definition of absolute temperature?Not learned 123. Which of the following designs is the most satisfactory method for attaching turbine blades to the rotor disk?Not learned 124. Which of the following is a disadvantage of utilizing a gas turbine versus a diesel engine for propulsion?Not learned 125. Which of the following drawbacks of a gas turbine engine provides the greatest potential for injury to personnel?Not learned 126. Which of the following is a feature of a power turbine blade that is not found on a high temperature turbine blade?Not learned 127. Which of the following is the main advantage of a split-axial compressor case?Not learned 128. Which of the following are the principle factors that affect the performance of a gas turbine compressor?Not learned 129. Which of the following is the principle that a magnetic speed sensor/pickup operates on?Not learned 130. Which of the following statements concerning fluid flow is true?Not learned 131. Which of the following statements correctly describes force?Not learned 132. Which of the following statements is true concerning axial compressor disk-type rotors?Not learned 133. Which of the following statements is true about the "lockout control" on a synchronous self-shifting (SSS) clutch?Not learned 134. Which of the following statements is true regarding centrifugal compressors?Not learned 135. Which of the following terms refers to thermal energy in transition?Not learned 136. Which of the following wrenches should NOT be used while working on a gas turbine?Not learned 137. The gas generating sections of marine gas turbine engines are based on which of the following?Not learned 138. Why is a gas turbine considered to operate on the Brayton cycle?Not learned 139. In a gas turbine engine, the majority of the energy is added to the working fluid in which of the following components?Not learned 140. Gas turbine fuel manifold pressure is established by which of the following actions?Not learned 141. On the GE LM2500 gas turbine engine, magnetic pickups are utilized for what purpose?Not learned 142. 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 143. In the marine gas turbine engine shown in the illustration, the HP turbine 2nd stage nozzle vanes are cooled by which of the followingNot learned 144. The only hand tools that should be used on gas turbine engines are chrome plated, nickel plated, or which of the following?Not learned 145. HP turbine blades are generally cooled by which of the following methods?Not learned 146. To keep the exit pressures relatively constant across a HP turbine blade, which type of construction is generally utilized?Not learned 147. Kelvin is the absolute temperature scale that corresponds to which of the following?Not learned 148. The lube oil system shown in the illustration, consists of which of the following sub-systemsNot learned 149. The lube oil system shown in the illustration, is designed to lubricate the main bearings by what principleNot learned 150. A magnet pickup typically produces what type of signal output?Not learned 151. When the main reduction gear lube oil system is secured, which of the following components maintains the air within the casing at less than 35 percent relative humidity?Not learned 152. How do you manually lockout an SSS clutch?Not learned 153. On most marine gas turbines used aboard ships, vibration sensors are identified as which of the following?Not learned 154. Mechanical work is defined as which of the following?Not learned 155. What method is utilized to allow turbine nozzle blades to withstand high inlet temperatures?Not learned 156. Newton's First Law of Motion states which of the following?Not learned 157. Newton's Second Law of Motion states which of the following?Not learned 158. Newton's Third Law of Motion states which of the following?Not learned 159. An open cycle gas turbine engine is best described by which of the following statements?Not learned 160. 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 161. Potential energy is defined as which of the following?Not learned 162. Power is defined as which of the following?Not learned 163. 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 164. What is the primary function of an axial compressor rotor blade?Not learned 165. Provisions for avoiding the buildup of ice on the intake air surfaces of a gas turbine plant can be found where?Not learned 166. Rankine is the temperature scale that corresponds to which of the following?Not learned 167. Rotation of the controllable-pitch propeller (CPP) blades is achieved through axial movement of what component in the hub body assembly?Not learned 168. As shown in the illustration, the component labeled "N" would be identified as a ________Not learned 169. 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 170. As shown in the illustration, what is the purpose of pressurizing the main bearing lube oil sumps on a typical marine gas turbineNot learned 171. In a single shaft, cold-end drive gas turbine, the power output speed has what relationship to the speed of the compressor?Not learned 172. Under standard atmospheric conditions, 208.7 PSIG converts to approximately what in absolute pressure?Not learned 173. "Standard Day" conditions, as defined by the ISO, is which of the following?Not learned 174. A temperature of 32.5 degrees Celsius converts to approximately what temperature in degrees Kelvin?Not learned 175. A temperature of 69.5 degrees Fahrenheit converts to approximately what temperature in degrees Rankine?Not learned 176. 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 177. What is the term given to a process that occurs without a loss or gain of heat?Not learned 178. What is the term used to describe the stationary vanes preceding the first stage of an axial compressor?Not learned 179. The thermal energy added to the gas as it flows through the combustion section has what effect on the gas?Not learned 180. 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 181. The three most common types of combustors used in gas turbine engines are which of the following?Not learned 182. Turbine disks are commonly attached to the shaft by which of the following methods?Not learned 183. The turbine nozzle blades convert the combustion gases heat and pressure energy into what form of energy?Not learned 184. The turbine nozzles convert heat and pressure energy to velocity energy by means of which of the following?Not learned 185. A turbine stage is represented by which of the following components and in which order?Not learned 186. The two basic types of compressors used in gas turbine engines are which of the following?Not learned 187. What are two common methods of power turbine blade retention?Not learned 188. Two functions of the compressor stator vanes include which of the following?Not learned 189. What are the two primary sources of deposits that build up on compressor blades?Not learned 190. What are the two principal functions of the turbine nozzle guide vanes?Not learned 191. What type of engine starter motor is commonly found on the marine gas turbine shown in the illustrationNot learned 192. Variable stator vanes give an axial gas turbine compressor which of the following capabilities?Not learned 193. Variable stator vanes give an axial gas turbine compressor which of the following capabilities?Not learned 194. 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 195. When working in or around intake areas, which of the following precautions should be taken?Not learned 196. The auxiliary steam boiler on your vessel is equipped with a gauge glass for local level indication. On which of the following auxiliary boiler types would this gauge glass be attached to a flash chamber also known as a steam accumulator or steam separator?Not learned 197. On which of the following auxiliary boiler types would soot blowers be equipped for maintaining heat transfer efficiency?Not learned 198. As shown in the illustration, if the vessel was operating at full sea speed, the area labeled "L" would be used to ________Not learned 199. In a coil-type forced circulation water-tube boiler, __________.Not learned 200. Control of the fuel oil metering valve in an automatically fired boiler is accomplished by a __________.Not learned 201. For the GE LM2500 gas turbine engine shown in the illustration, the 13th stage bleed air is used for which of the followingNot learned 202. As shown in the illustration, if the vessel was operating at full sea speed, the area labeled "A" would be used to ________Not learned