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

USCG Steam Plants (Boilers & Turbines) (Set 13)

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Question 1 of 30

The maximum lube oil temperature leaving a large, main propulsion steam turbine bearing should __________.

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30 MCQs

#1 The maximum lube oil temperature leaving a large, main propulsion steam turbine bearing should __________. #2 A cloudy or milky appearing lube oil sample, taken from the main lubricating oil system could be caused by __________. #3 Which of the following problems will occur if a manually cleaned disk-type centrifugal lube oil purifier contains insufficient sealing water prior to admitting oil flow to the bowl? #4 If saltwater leaks into and contaminates the main lubricating oil system, which of the following remedial actions should be taken? #5 Which of the following would contribute to the formation of an oil and water emulsion, in addition to acid formation? #6 The slight wavy appearance of the tips of reduction gear teeth is a result of __________. #7 Which of the following types of bearings are used as line shaft bearings? #8 Which of the following methods is used to securely fasten the Babbitt lining of a reduction gear bearing to its shell? #9 Babbitt is a metal alloy commonly used for lining __________. #10 Which of the following construction methods would apply to the Babbitt lined, split- type, reduction gear bearings? #11 The splits located in the halves of main reduction gear bearings are aligned at an angle to the horizontal in order to resist __________. #12 Chamfers, located at the parting edges of horizontal split sleeve type bearings, are used to facilitate oil storage and distribution. They are machined __________. #13 Most main propulsion reduction gear bearings are __________. #14 Which of the devices listed is commonly used to compensate for the expansion and minor misalignments occurring between the main turbine rotor and the reduction gear? #15 Axial movement in a gear-type flexible coupling is provided for by __________. #16 Which of the following statements is true concerning the coupling shown in the illustration? Illustration SE-0001 #17 Which of the coupling types listed is shown in the illustration? Illustration SE-0001 #18 The part shown in the illustration would be located between which of the following components of a modern geared turbine main propulsion unit? Illustration SE-0001 #19 On main turbine propulsion units, gear type flexible couplings are generally used between the __________. #20 The component shown in the illustration, labeled "I", is the __________. SE-0013 #21 The purpose of the main reduction gears is to __________. #22 The component shown in the illustration, labeled "IV", is the __________. SE-0013 #23 What is the significance of pinion deflection in the operation of reduction gears? #24 After the housing has been bolted down, the final check of reduction gear tooth contact is usually made by __________. #25 The component labeled "II", as shown in the illustration is called the __________. Illustration SE-0013 #26 The component shown in the illustration, labeled "III", is the __________. Illustration SE-0013 #27 The reduction gear shown in the illustration is a/an __________. Illustration SE-0013 #28 Which of the following statements defines the term 'axial float' in reference to reduction gears? #29 A ship is equipped with the illustrated turbine gear set and a right hand turning propeller. When steam is admitted to the astern element, with sternway on, the high-speed gear on the high pressure side is__________. Illustration SE-0016 #30 As found in a reduction gear drive system, thrust bearings serve to __________.

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