USCGQ
Log in Start free
USCGQ
Toggle sidebar
Home
Engine
Gas Turbines
Start practicing

Engine · 277 questions

Gas Turbines - USCG Exam Questions

Gas turbine theory, construction, operation, and the support systems found in gas turbine propulsion plants.

Every question below is a real U.S. Coast Guard exam question with four choices. Answer one and the correct choice is revealed instantly, with the USCG reference and illustration where the question uses one.

Random question Build a timed exam

All Gas Turbines questions

Questions 101–200 of 277 · page 2 of 3

  1. #308 The acronym MFC represents which of the following?
  2. #309 The acronym CDP stands for which of the following?
  3. #310 The acronym GG represents which of the following?
  4. #311 The acronym VSV represents which of the following?
  5. #312 The acronym FOD stands for which of the following?
  6. #313 Power is defined as which of the following?
  7. #314 Which of the following statements correctly describes force?
  8. #315 Mechanical work is defined as which of the following?
  9. #316 Potential energy is defined as which of the following?
  10. #317 What is the term used to describe the stationary vanes preceding the first stage of an axial compressor?
  11. #318 Variable stator vanes give an axial gas turbine compressor which of the following capabilities?
  12. #319 Two functions of the compressor stator vanes include which of the following?
  13. #320 What is the function of the stator in a axial gas turbine compressor?
  14. #321 An axial compressor stator vane that is mechanically adjusted to provide optimum compressor performance over a wide operating range is referred to as...
  15. #322 The main reduction gear performs which of the following functions?
  16. #323 What type of main reduction gear arrangement prevents independent axial and rotational movement of the pinions?
  17. #324 The purpose of the main reduction gear in a marine gas turbine propulsion installation is which of the following?
  18. #325 What feature is commonly used on articulated reduction gear arrangements for the correction of misalignment between the 1st reduction gear and the 2nd...
  19. #326 In a gas turbine engine, the majority of the energy is added to the working fluid in which of the following components?
  20. #327 A centrifugal-flow gas turbine uses what type of combustion chamber?
  21. #328 The three most common types of combustors used in gas turbine engines are which of the following?
  22. #329 Which of the following statements concerning fluid flow is true?
  23. #330 The term "divergent" is best described as which of the following?
  24. #331 Why is the cycle efficiency higher in the intercooled-recuperated cycle as compared to a simple cycle gas turbine? Illustration GT-0031 illustration
  25. #332 A gas turbine engine in which exhaust gas heat energy is added to the compressor air charge before entering the combustor, is classified as which of t...
  26. #333 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...
  27. #339 While standing watch on a ship equipped with the gas turbine engine shown in the illustration, a fire emergency stop is initiated when which of the fo... illustration
  28. #340 An open cycle gas turbine engine is best described by which of the following statements?
  29. #341 What is the difference between an open cycle and a closed cycle gas turbine engine?
  30. #344 In a typical gas turbine propulsion plant, the main thrust bearing directly positions which part(s) of the main reduction gear?
  31. #345 Which of the following is a disadvantage of utilizing a gas turbine versus a diesel engine for propulsion?
  32. #346 Compared to other types of engines, what is the biggest advantage of a gas turbine engine?
  33. #347 Which of the following drawbacks of a gas turbine engine provides the greatest potential for injury to personnel?
  34. #348 Newton's Second Law of Motion states which of the following?
  35. #349 Newton's Third Law of Motion states which of the following?
  36. #350 Newton's First Law of Motion states which of the following?
  37. #351 The bleed air surge relief valve differs from a normal relief valve in which of the following ways?
  38. #352 All clock positions, engine references, and enclosure references apply to viewing the gas turbine engine shown in the illustration from which of the f... illustration
  39. #354 Which of the following is the principle that a magnetic speed sensor/pickup operates on?
  40. #355 A magnet pickup typically produces what type of signal output?
  41. #356 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 t...
  42. #357 How do the high-velocity high-temperature gases cause the gas turbine rotor to rotate?
  43. #358 The turbine nozzles convert heat and pressure energy to velocity energy by means of which of the following?
  44. #359 A turbine stage is represented by which of the following components and in which order?
  45. #360 The gas generating sections of marine gas turbine engines are based on which of the following?
  46. #361 What are two common methods of power turbine blade retention?
  47. #362 Which of the following is a feature of a power turbine blade that is not found on a high temperature turbine blade?
  48. #363 Accelerating the compressor to the self sustaining speed of the engine is the function of which of the following components?
  49. #364 What type of engine starter motor is commonly found on the marine gas turbine shown in the illustration? Illustration GT-0006 illustration
  50. #365 What type of starter is commonly used on smaller gas turbine engines?
  51. #366 Which of the following statements is true about an axial compressor disk-type rotor?
  52. #367 The primary function of an axial compressor rotor blade is which of the following?
  53. #368 Why are loose-fitting blades used on the first several stages of large axial compressors?
  54. #369 What is a compressor midspan shrould?
  55. #370 What are the two common forms of axial compressor rotor blade roots?
  56. #371 The lube oil system shown in the illustration, is designed to lubricate the main bearings by what principle? Illustration GT-0023 illustration
  57. #376 What is the purpose of the air/oil separator shown in the illustration of the gas turbine lube oil system? Illustration GT-0024 illustration
  58. #377 The turbine nozzles function to direct the gases in what direction?
  59. #378 What are the two principle functions of the turbine nozzle guide vanes?
  60. #379 The circle of turbine stationary vanes that convert pressure and thermal energy to velocity energy and direct the combustion gases in the direction of...
  61. #380 What method is utilized to allow turbine nozzle blades to withstand high inlet temperatures?
  62. #381 The turbine nozzle blades convert the combustion gases heat and pressure energy into what form of energy?
  63. #383 On most marine gas turbines used aboard ships, vibration sensors are identified as which of the following?
  64. #384 Routine water washing of the gas turbine engine compressor shown in the illustration, is usually performed while operating under which of the followin... illustration
  65. #385 The two primary sources of deposits that build up on compressor blades are?
  66. #386 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 followi... illustration
  67. #387 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... illustration
  68. #388 Aboard ship, single-shaft gas turbines are used mostly as prime movers for which of the following applications?
  69. #389 Which of the following is an advantage of a single-shaft gas turbine engine compared to a split-shaft gas turbine engine?
  70. #390 In a single shaft, cold-end drive gas turbine, the power output speed has what relationship to the speed of the compressor?
  71. #391 Which of the following is the main advantage of a split axial compressor case?
  72. #392 A pressure stage of an axial-type compressor consists of which of the following?
  73. #393 Each stage of an axial-compressor of a gas turbine can compress the atmospheric air a total of how many times?
  74. #394 The purpose of the metal spray rub coating on the rotor and stator casing of an axial type compressor is which of the following?
  75. #395 An axial compressor basically consists of which of the following?
  76. #396 An axial compressor stage is represented by which of the following components and in which order?
  77. #397 Which of the following components removes the oil from the transfer gearbox?
  78. #398 The short length of the can-annular combustion chamber provides for which of the following conditions?
  79. #399 Ball or roller antifriction bearings are used to support gas turbine rotors for all EXCEPT which of the following?
  80. #400 Under standard atmospheric conditions, 208.7 PSIG converts to approximately what in absolute pressure?
  81. #401 A temperature of 69.5 degrees Fahrenheit converts to approximately what temperature in degrees Rankine?
  82. #402 A temperature of 32.5 degrees Celsius converts to approximately what temperature in degrees Kelvin?
  83. #427 What are the two prime sources of deposits that build up on compressor blades?
  84. #437 Which of the following conditions will NOT be the result of a build-up of deposits in a gas turbine compressor?
  85. #440 When performing a static check to determine tooth contact, you should use which of the following compounds to coat the gear teeth?
  86. #456 In the marine gas turbine engine shown in the illustration, the HP turbine 1st stage nozzle vanes are cooled by which of the following? Illustration G... illustration
  87. #457 Which of the following components prevent(s) objects smaller than 1/4 inch from entering the GE LM2500 gas turbine engine?
  88. #458 How is the HP turbine rotor of the GE LM2500 gas turbine cooled?
  89. #459 Where are the carbon dioxide nozzles located in the GE LM2500 gas turbine enclosure?
  90. #460 What is the primary purpose of the diffuser and distributor on the GE LM2500 gas turbine?
  91. #461 How many shock mounts are used to secure the GE LM2500 gas turbine enclosure to the ship's foundation?
  92. #462 The gas generator section of the GE LM2500 gas turbine is composed of all of the following components EXCEPT which of the following?
  93. #463 The struts of the GE LM2500 compressor front frame provide passages for all of the following mediums EXCEPT which of the following?
  94. #464 What type of combustor is used by the GE LM2500 gas turbine?
  95. #465 Provisions for avoiding the build-up of ice on the intake air surfaces of a gas turbine plant can be found where?
  96. #466 The divergent area of the exhaust duct aids in what process?
  97. #467 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... illustration
  98. #468 What is the primary function of the main fuel control on the GE LM2500 gas turbine engine?
  99. #469 For the GE LM2500 gas turbine shown in the illustration, the 9th stage bleed air is used for which of the following? Illustration GT-0017 illustration
  100. #470 For the GE LM2500 gas turbine engine shown in the illustration, the 13th stage bleed air is used for which of the following? Illustration GT-0017 illustration

Other Engine modules

About the Engine question pool

The Engine pool holds the current U.S. Coast Guard questions for engineering credentials, from QMED ratings through DDE and Assistant Engineer up to Chief. Answer any question to see the correct choice instantly.