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

USCG Gas Turbines (Set 4)

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Question 1 of 30

On a propulsion marine gas turbine, if full power temperatures become excessive, what action should the operator take?

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30 MCQs

#1 On a propulsion marine gas turbine, if full power temperatures become excessive, what action should the operator take? #2 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 following? Illustration GT-0017 #3 Accelerometers are generally used on gas turbine engines to sense which of the following? #4 Displacement, velocity and acceleration describe three types of which of the following? #5 Which of the following could cause compressor stall? #6 The two main types of compressor stall are known as what? #7 What is the term given to the condition in which cyclic pressure changes result in a repetitive failure and recovery of compressor air flow? #8 How can compressor stall be prevented? #9 Compressor surge is caused by which of the following factors? #10 When a compressor is in a stall condition, what will happen to the combustor and turbine temperatures? #11 The acronym MFC represents which of the following? #12 The acronym CDP stands for which of the following? #13 The acronym GG represents which of the following? #14 The acronym VSV represents which of the following? #15 The acronym FOD stands for which of the following? #16 Power is defined as which of the following? #17 Which of the following statements correctly describes force? #18 Mechanical work is defined as which of the following? #19 Potential energy is defined as which of the following? #20 What is the term used to describe the stationary vanes preceding the first stage of an axial compressor? #21 Variable stator vanes give an axial gas turbine compressor which of the following capabilities? #22 Two functions of the compressor stator vanes include which of the following? #23 What is the function of the stator in a axial gas turbine compressor? #24 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? #25 The main reduction gear performs which of the following functions? #26 What type of main reduction gear arrangement prevents independent axial and rotational movement of the pinions? #27 The purpose of the main reduction gear in a marine gas turbine propulsion installation is which of the following? #28 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? #29 In a gas turbine engine, the majority of the energy is added to the working fluid in which of the following components? #30 A centrifugal-flow gas turbine uses what type of combustion chamber?

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