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

USCG Steam Plants (Boilers & Turbines) (Set 5)

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Question 1 of 30

Sludge tanks are used in an oil lubricating system to receive __________.

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30 MCQs

#1 Sludge tanks are used in an oil lubricating system to receive __________. #2 The bulk of the solid material entering a centrifugal purifier with lube oil is __________. #3 The dirty oil inlet on centrifugal lube oil purifiers is located at the __________. #4 In a disk type centrifugal purifier, the bowl is mounted on the upper end of the __________. #5 Of the many impurities commonly found in marine lubricating oil, which of the following CANNOT be removed by a centrifugal purifier at normal operating speeds and temperatures? #6 What type of strainer is used in a turbine lube oil system to remove metallic particles? #7 Magnets are installed in the main propulsion turbine lube oil strainers to attract metal particles released through wearing of the __________. #8 Which of the filter/strainer units listed permits you to clean the element while leaving the system on the line? #9 As the speed of an oil lubricated ball bearing increases, fluid friction, due to churning, generates heat. This condition may be avoided by __________. #10 Which of the filters listed will deplete the additives in lubricating oil? #11 After the steam leaves the low pressure turbine, it enters the __________. #12 In a cross-compounded turbine propulsion plant, steam enters the __________. #13 Steam supplied to the main propulsion turbines is __________. #14 Concerning the classification of steam turbines, a cross compound designed unit __________. #15 An efficient seal is normally obtained between the upper and lower halves of a turbine casing by __________. #16 Which of the devices listed is found on an LP main propulsion steam turbine casing? #17 The adjustable spherically seated self-aligning bearing housings used in main turbines are provided with oil deflector rings. The function of these rings is to __________. #18 The jacking gear must be engaged as quickly as possible when securing the Main Turbines in order to __________. #19 The jacking gear on main propulsion turbines can be used to __________. #20 A common method of preheating main turbine lube oil prior to rolling over the main unit would be to ________. #21 To stop the rotor of a main turbine while underway at sea you should __________. #22 Which of the following operational practices is helpful in avoiding the accumulation of condensate in the main reduction gear casing? #23 Guardian valves are installed on main propulsion turbines to __________. #24 What will be the FIRST thing to occur if both the main and standby lube oil pumps failed to operate on a geared main propulsion steam turbine operating at full sea speed? #25 While a vessel is underway, one of the FIRST indications of the failure of the gland leakoff exhaust fan motor is __________. #26 Operating a steam turbine propulsion unit at reduced speed, in an area with extremely cold seawater, with the main circulating pump providing full cooling water flow to the condenser will result in __________. #27 During normal operation of a main propulsion turbine, the lube oil supply temperature to the bearings should be maintained at approximately __________. #28 Improper operation or faulty main steam turbine components may be indicated by an abnormal variation in _______. #29 The astern guarding valve on main propulsion steam turbine units must be open when a vessel is __________. #30 Hot running bearings can be caused by __________.

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