Pass Benchmark: 70% (21/30) • Standard: USCG NMC / 46 CFR
USCG Gas Turbines (Set 5)
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Question 1 of 30
The three most common types of combustors used in gas turbine engines are which of the following?
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30 MCQs #1 The three most common types of combustors used in gas turbine engines are which of the following? #2 Which of the following statements concerning fluid flow is true? #3 The term "divergent" is best described as which of the following? #4 Why is the cycle efficiency higher in the intercooled-recuperated cycle as compared to a simple cycle gas turbine? Illustration GT-0031 #5 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 the following? #6 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? #7 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 following situations occur? Illustration GT-0017 #8 An open cycle gas turbine engine is best described by which of the following statements? #9 What is the difference between an open cycle and a closed cycle gas turbine engine? #10 In a typical gas turbine propulsion plant, the main thrust bearing directly positions which part(s) of the main reduction gear? #11 Which of the following is a disadvantage of utilizing a gas turbine versus a diesel engine for propulsion? #12 Compared to other types of engines, what is the biggest advantage of a gas turbine engine? #13 Which of the following drawbacks of a gas turbine engine provides the greatest potential for injury to personnel? #14 Newton's Second Law of Motion states which of the following? #15 Newton's Third Law of Motion states which of the following? #16 Newton's First Law of Motion states which of the following? #17 The bleed air surge relief valve differs from a normal relief valve in which of the following ways? #18 All clock positions, engine references, and enclosure references apply to viewing the gas turbine engine shown in the illustration from which of the following locations? Illustration GT-0017 #19 Which of the following is the principle that a magnetic speed sensor/pickup operates on? #20 A magnet pickup typically produces what type of signal output? #21 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? #22 How do the high-velocity high-temperature gases cause the gas turbine rotor to rotate? #23 The turbine nozzles convert heat and pressure energy to velocity energy by means of which of the following? #24 A turbine stage is represented by which of the following components and in which order? #25 The gas generating sections of marine gas turbine engines are based on which of the following? #26 What are two common methods of power turbine blade retention? #27 Which of the following is a feature of a power turbine blade that is not found on a high temperature turbine blade? #28 Accelerating the compressor to the self sustaining speed of the engine is the function of which of the following components? #29 What type of engine starter motor is commonly found on the marine gas turbine shown in the illustration? Illustration GT-0006 #30 What type of starter is commonly used on smaller gas turbine engines?
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