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

USCG General Subjects (Auxiliaries & Systems) (Set 21)

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Question 1 of 30

As it pertains to the automatic hydraulic brake of a horizontal electro-hydraulic anchor windlass, what statement is true?

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30 MCQs

#1 As it pertains to the automatic hydraulic brake of a horizontal electro-hydraulic anchor windlass, what statement is true? #2 As it pertains to raising and lowering an anchor with a horizontal electro-hydraulic or electro-mechanical anchor windlass, what statement is true? #3 As it pertains to the automatic electric brake of a capstan, what statement is true? #4 A hydraulic fluid flow control circuit, controlling linear actuator speed during extension, with the pump operating at system pressure, is known as a __________. #5 A bearing using an oiling ring as a means of static oil feed must occasionally be serviced by removing the wear particles, grit, and moisture. How is this accomplished? #6 On a bearing using an oiling ring as a means of static oil feed, how often should the bottom of the bearing sump be drained of impurities? #7 On a bearing using an oiling ring as means of static oil feed, unless adverse conditions would indicate otherwise, how often should the oil be completely changed at a minimum? #8 In a forced-feed lubrication system, what statement is true concerning lube oil reservoir/sump residence time? #9 Which of the following statements best describes the filtering ability of a fine mesh metal lube oil strainer? #10 Which of the filter/strainer units listed permits you to clean the element while leaving the system on the line? #11 When an electricity generating plant features shaft-driven generators, what type of propulsor is generally used for main propulsion? #12 What type of propeller consists of a flat disc set flush with the under surface of the vessel's hull with a number of vertical, rudder-like blades projecting from it? #13 Which of the following propulsor types represents the proper terminology for electric propulsion where the drive motors are outside the ship's hull? #14 Which of the following propulsor types does not require the use of a separate rudder for steerage? #15 Concerning steerable internal duct thrusters, what statement is true? #16 What statement represents the fundamental difference between an azimuthing thruster and a podded propulsor? #17 With respect to a "tractor" type azimuthing thruster, what statement is true? #18 What type of propulsor is typically used in electric motor driven, transverse, tunnel bow thrusters to limit the starting current of the single speed drive motor? #19 Which set of operating conditions would be most problematic in terms of the deterioration of the insulation resistance of the drive motor of an electric motor driven transverse tunnel bow thruster? #20 Of the following propulsion modes, which one would operate with a geared-drive featuring a single reduction? #21 For a parallel axis single reduction gear, what statement is true? #22 Which of the following couplings or clutches would be able to prevent the transmission of torsional vibrations from an engine to a reduction gear? #23 Concerning main propulsion reduction gears, what statement is true? #24 Of the following propulsion modes, which one would operate with a geared-drive featuring a double reduction? #25 What statement is true concerning the arrangement of line shaft bearing housings? #26 What statement is true concerning the purpose of an independent main thrust bearing where used? #27 Concerning the proper lubrication of a ring-oiled line shaft bearing, what statement is true? #28 What type of bearing is most generally used as an independent main thrust block on merchant ships? #29 After a disassembly of a single stage centrifugal pump, one finds the outer circumference of the impeller badly pitted and worn. Not having a spare impeller on board, it is decided to turn down the impeller to eliminate the wear/pitting. What will be the pump capacity, in GPM, after the reduction of impeller diameter by 0.5 inches? GIVEN: Original pump capacity = 30 GPM Original impeller diameter = 8 in. #30 One is informed by the owner that two of the vessel's electrically driven centrifugal cooling water pumps will be replaced with two of higher capacity pumps. No modification of existing piping will be involved. What should be your concerns from an operational perspective?

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