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

USCG Steam Plants (Boilers & Turbines) (Set 26)

30:00

|

Question 1 of 30

Question Navigator

Correct Incorrect Pending Starred

Question 1 of 30

The constant pressure governor of a turbine-driven feed pump maintains which of the following pressures at a constant value for all capacities?

Browse Questions in Set 26

30 MCQs

#1 The constant pressure governor of a turbine-driven feed pump maintains which of the following pressures at a constant value for all capacities? #2 A sequential lift, nozzle valve control bar on a turbo generator, utilizes which of the following operating principles? #3 Which of the following statements represents the significance of the differential pressure existing between the nozzle block and steam chest of a turbo generator equipped with a lifting beam mechanism? #4 Which of the following is used to hold the poppet valves closed in a turbo generators nozzle control speed regulator? #5 A motor driven synchronizing device, figure "D" shown in the illustration, operated from the generator switchboard, initiates fine adjustments to the steam turbine speed by directly __________. Illustration SE-0009 #6 One function of the disks, in a disk-type centrifugal purifier, is to divide the bowl space into many separate passages to __________. #7 The size of the discharge ring used for the efficient operation of a disk type purifier is dependent upon the __________. #8 In a disk type centrifugal purifier, the contaminated oil enters the centrifuge __________. #9 Clean oil leaves the centrifuge illustrated through item __________. Illustration GS-0124 #10 Water removed through centrifugal force in the illustrated unit is displaced from the bowl through __________. Illustration GS-0124 #11 The three wing device in the unit illustrated is maintained in its position by item __________. Illustration GS-0124 #12 Oil supply pressure to the main lube oil header of a gravity feed lube oil system is __________. #13 Which of the following statements is true concerning the lube oil system shown in the illustration? Illustration SE-0011 #14 Which of the following statements about gravity type lube oil systems is correct? #15 After starting the main lube oil pump in a gravity-type lube oil system, you should verify that the gravity tanks are full by __________. #16 In a steam turbine and reduction gear main propulsion plant, the alarm sensor for low turbine oil pressure is usually installed __________. #17 62. The maximum lube oil temperature leaving the lube oil cooler of a main steam turbine propulsion system should __________. #18 63. The maximum lube oil temperature leaving a large, main propulsion steam turbine bearing should __________. #19 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? #20 When an oil purification centrifuge loses a portion of its seal, the oil can then be discharged through the heavy phase discharge port. This is partly a result of greater __________. #21 In the illustrated device, what would be a reason for oil being discharged from port "N" ? Illustration GS-0124 #22 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? #23 If a lube oil pump fails to build up discharge pressure, the cause could be the __________. #24 If a tube should leak in an operating main steam turbine lube oil cooler, the water will not immediately contaminate the oil because the __________. #25 While a vessel is underway, which of the conditions listed would indicate a leak in the lube oil cooler? #26 While making your rounds, you notice the main lube oil temperature to be higher than normal. To remedy this situation, you should __________. #27 No lube oil appearing in the sight glass (bull's eye) of a gravity type system is a positive indication of __________. #28 Which of the conditions listed could cause an oil flow sight glass, of a main turbine bearing, to be completely filled with oil? #29 When a sudden increase in pressure occurs in a forced lubrication system, you should check for a __________. #30 To determine the extent of lube oil system contamination you would __________.

Question Discussion & Notes

0

Have a doubt, memory trick, or exam update? Share your insights with fellow mariners.

Loading mariner discussions...