Pass Benchmark: 70% • Standard: USCG NMC / 46 CFR
USCG Engine Gas Turbines (Supplementary) (Set 2)
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Question 1 of 30
Which of the following is an advantage of a single-shaft GTE compared to a split-shaft GTE?
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30 MCQs #1 Which of the following is an advantage of a single-shaft GTE compared to a split-shaft GTE? #2 In a twin-spool turbine, secondary air is most essential for cooling in what section? #3 What type of air seal is used in the sump and turbine areas of a GTE? #4 What type of air seal is used in the combustor and turbine midframe of a GTE? #5 What type of seal is used in the gearbox of a GTE? #6 What is the purpose of the spring in a lip-type oil seal? #7 What type of starter is commonly used on smaller GTEs? #8 Accelerating the compressor to the self sustaining speed of the engine is the function of which of the following components? #9 What type of engine starter motor is commonly found on the marine gas turbine shown in the illustration? Illustration GT-0006 #10 During a "hung start" of a GTE, which of the following conditions will occur? #11 As shown in the illustration, what is the purpose of pressurizing the main bearing lube oil sumps on a typical marine gas turbine? Illustration GT-0023 #12 Petroleum based lubricating oils are NOT suitable for use in GTEs for which of the following reasons? #13 The lube oil system shown in the illustration is designed to lubricate the main bearings by what principle __________. Illustration GT-0023 #14 The purpose of the air/oil separator as shown in the illustration of a typical gas turbine lube oil system is to _________. Illustration GT-0024 #15 The sensors which transmit remote system temperatures on marine gas turbines are usually constructed as __________. #16 The lube oil scavenge pressure on the marine gas turbine shown in the illustration, is sensed by a ___________. Illustration GT-0017 #17 Which of the following components removes the oil from the transfer gearbox? #18 The main lube oil system pump check valves serve to maintain system prime and perform which of the following other functions? #19 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? #20 How is the lube oil supplied to each bearing in a GTE controlled? #21 On the marine gas turbine lube oil system shown in the illustration, air and oil are separated in the air/oil separator mainly by the use of __________. Illustration GT-0024 #22 The main lube oil system used on the marine gas turbine engine shown in the illustration, is classified as a __________. Illustration GT-0017 #23 On the marine gas turbine engine as shown in the illustration, the main lube oil system is cooled by ________. Illustration GT-0017 #24 If the lube oil scavenge temperature exceeds 300 degrees F on the marine gas turbine engine shown, and reducing power does NOT bring the temperature within limits, the operator should _________. Illustration GT-0017 #25 The lube oil system shown in the illustration, consists of which of the following sub- systems? Illustration GT-0024 #26 What is the approximate percentage of air extracted from the compressor that is mixed with fuel for combustion in a gas turbine? #27 The fuel oil system of a GTE provides all EXCEPT which of the following? #28 What is the power source for the ignition exciter of a GTE? #29 In the ignition system of a GTE, how is optimum spark achieved? #30 What is the most common type of spark igniter used on a GTE?
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