Pass Benchmark: 70% (21/30) • Standard: USCG NMC / 46 CFR

USCG Gas Turbines (Set 7)

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Question 1 of 30

A temperature of 69.5 degrees Fahrenheit converts to approximately what temperature in degrees Rankine?

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30 MCQs

#1 A temperature of 69.5 degrees Fahrenheit converts to approximately what temperature in degrees Rankine? #2 A temperature of 32.5 degrees Celsius converts to approximately what temperature in degrees Kelvin? #3 What are the two prime sources of deposits that build up on compressor blades? #4 Which of the following conditions will NOT be the result of a build-up of deposits in a gas turbine compressor? #5 When performing a static check to determine tooth contact, you should use which of the following compounds to coat the gear teeth? #6 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 GT-0020 #7 Which of the following components prevent(s) objects smaller than 1/4 inch from entering the GE LM2500 gas turbine engine? #8 How is the HP turbine rotor of the GE LM2500 gas turbine cooled? #9 Where are the carbon dioxide nozzles located in the GE LM2500 gas turbine enclosure? #10 What is the primary purpose of the diffuser and distributor on the GE LM2500 gas turbine? #11 How many shock mounts are used to secure the GE LM2500 gas turbine enclosure to the ship's foundation? #12 The gas generator section of the GE LM2500 gas turbine is composed of all of the following components EXCEPT which of the following? #13 The struts of the GE LM2500 compressor front frame provide passages for all of the following mediums EXCEPT which of the following? #14 What type of combustor is used by the GE LM2500 gas turbine? #15 Provisions for avoiding the build-up of ice on the intake air surfaces of a gas turbine plant can be found where? #16 The divergent area of the exhaust duct aids in what process? #17 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 following? Illustration GT-0021 #18 What is the primary function of the main fuel control on the GE LM2500 gas turbine engine? #19 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 #20 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 #21 In order to get a ready indication for a normal start with an GE LM2500 gas turbine engine, what permissive(s) must be met? #22 For the GE LM2500 gas turbine engine shown in the illustration, the HP turbine 2nd stage nozzle vanes are cooled by which of the following? Illustration GT-0020 #23 For the GE LM2500 gas turbine engine shown in the illustration, the HP turbine 2nd stage blades are cooled by convection, with the cooling air being discharged where? Illustration GT-0011 #24 In the ignition system of a gas turbine engine, how is optimum spark achieved? #25 What is the power source for the ignition exciter of a gas turbine engine? #26 What is the most common type of spark igniter used on a gas turbine engine? #27 When removing the gas turbine engine as shown in the illustration, how is the engine removal accomplished? Illustration GT-0022 #28 A gas turbine engine’s main lube oil system pump check valve serves to maintain system prime and perform what other function? #29 How is the lube oil supplied to each bearing in a gas turbine engine controlled? #30 The electrostatic vent fog precipitator removes oil mist from which of the following areas?

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