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

USCG General Subjects (Auxiliaries & Systems) (Set 13)

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Question 1 of 30

Which of the following propulsor types represents the proper terminology for a screw propeller of the conventional design?

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30 MCQs

#1 Which of the following propulsor types represents the proper terminology for a screw propeller of the conventional design? #2 When an electricity generating plant features shaft-driven generators, what type of propulsor is generally used for main propulsion? #3 Which of the following propulsor types would be used with unidirectional propulsion shafting rotation? #4 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? #5 Which of the following propulsor types represents the proper terminology for electric propulsion where the drive motors are outside the ship's hull? #6 Concerning the operating mechanism of a controllable-pitch propeller, what statement is true? #7 Which of the following propulsor types does not require the use of a separate rudder for steerage? #8 If a main propulsion shafting arrangement is such that no strut or strut bearing is required, what is an alternative name given to the propeller shaft, which is the section of shafting that the propeller is attached to? #9 What statement is true concerning the lubrication of line shaft bearings? #10 What statement is true concerning the ability of a line shaft bearing to adapt to shaft misalignment as the ship's hull flexes? #11 Which line shaft bearing is most likely to have both upper and lower half bearing shells on merchant ships? #12 Concerning the arrangements of a disk-oiled line shaft bearing, what statement is true? #13 What statement is true with respect to the back of a propeller blade? #14 What is meant by the term "left-handed" propeller? #15 Concerning transverse fixed tunnel thrusters, what statement is true? #16 Concerning steerable internal duct thrusters, what statement is true? #17 With respect to the vectoring ring of a steerable internal duct thruster, what statement represents the operating principle of the vectoring ring? #18 What statement represents the fundamental difference between an azimuthing thruster and a podded propulsor? #19 With respect to a "pusher" type azimuthing thruster, what statement is true? #20 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? #21 What is the primary advantage of transverse bow and stern tunnel thrusters when installed on ships? #22 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? #23 The gears used for virtually all marine propulsion reduction gear sets are of what type? #24 Of the following propulsion modes, which one would operate with a geared-drive featuring a single reduction? #25 What is an example of an epicyclic gear? #26 For a parallel axis single reduction gear, what statement is true? #27 Which of the listed reduction gear sets has the input and output shafts in-line with one another? #28 Which of the following couplings or clutches allows, within limits, a certain degree of slip? #29 Concerning main propulsion reduction gears, what statement is true? #30 What is a shipboard application for a worm gear drive?

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