Pass Benchmark: 70% (21/30) • Standard: USCG NMC / 46 CFR
USCG Steam Plants (Boilers & Turbines) (Set 12)
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Question 1 of 30
In the operation of a lube oil clarifier, the position of the oil-water interface should be __________.
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30 MCQs #1 In the operation of a lube oil clarifier, the position of the oil-water interface should be __________. #2 Which of the following statements concerning the operation of a lube oil purifier is correct? #3 A centrifuge will satisfactorily remove which of the listed substances from lube oil? #4 The water seal in a centrifuge, operating at normal speed, prevents the lube oil from discharging from the water outlet. Another function of the seal is to __________. #5 In order to maintain the effectiveness of the lube oil centrifuge to remove water, the engineer in charge should __________. #6 When water is removed from lube oil passing through a centrifugal purifier, the water removed will __________. #7 One function of the disks, in a disk-type centrifugal purifier, is to divide the bowl space into many separate passages to __________. #8 The size of the discharge ring used for the efficient operation of a disk type purifier is dependent upon the __________. #9 The disk stack and tubular shaft used in a lube oil centrifugal purifier is forced to rotate at bowl speed by __________. #10 In a disk type centrifugal purifier, the contaminated oil enters the centrifuge __________. #11 In a disk-type lubricating oil purifier, __________. #12 Item "Q" in the illustration is used to __________. Illustration GS-0124 #13 Clean oil leaves the centrifuge illustrated through item __________. Illustration GS-0124 #14 The rotating speed of the tubular bowl centrifuge is more than twice that of the disk type. The reason for this is __________. #15 Water removed through centrifugal force in the illustrated unit is displaced from the bowl through __________. Illustration GS-0124 #16 The three wing device in the unit illustrated is maintained in its position by item __________. Illustration GS-0124 #17 Oil supply pressure to the main lube oil header of a gravity feed lube oil system is __________. #18 Oil flowing through the sight glass in the line between the lube oil gravity tank and main sump indicates the __________. #19 Which of the following statements is true concerning the lube oil system shown in the illustration? Illustration SE-0011 #20 In a gravity lube oil system, a sight glass is installed in a line near the operating platform. This line connects the __________. #21 Which of the following statements about gravity type lube oil systems is correct? #22 On a ship equipped with a gravity type lube oil system, which of the conditions listed will occur FIRST if the main lube oil pump discharge pressure is lost? #23 After starting the main lube oil pump in a gravity-type lube oil system, you should verify that the gravity tanks are full by __________. #24 In steam turbine and reduction gear units, lube oil coolers installed in the lube oil system are located between the __________. #25 In a steam turbine and reduction gear main propulsion plant, the alarm sensor for low turbine oil pressure is usually installed __________. #26 Water retained in the lube oil system of a main propulsion turbine installation is undesirable because it __________. #27 If a lube oil pump fails to build up discharge pressure, the cause could be the __________. #28 When the flow of oil admitted to a disk-type centrifugal purifier is in excess of its designed capacity, which of the following conditions will usually occur? #29 While a vessel is underway, which of the conditions listed would indicate a leak in the lube oil cooler? #30 Which of the following conditions may exist if you detect an excessive amount of metal particles on a main engine lube oil strainer magnet?
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