Question 347General Subjects - Assistant Engineer
70% to passWhat 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?
AFixed-pitch propeller
BDetachable-blade (built-up) propeller
CCycloidal propeller
DControllable-pitch propeller
AI Explanation
The correct answer is D) Controllable-pitch propeller. Tunnel bow thrusters used in electric motor driven, transverse configurations typically employ a controllable-pitch propeller design. This allows the starting current of the single speed drive motor to be limited by adjusting the pitch of the propeller blades, reducing the initial load on the motor during startup. The variable pitch capability of the propeller is a key feature that makes it the preferred propulsor type for this application, as opposed to fixed-pitch, detachable-blade, or cycloidal propellers which do not provide the same ability to control starting current.
Related Questions
Q94:While standing watch in the engine room, you notice a high reading at a salinity... Q348:What statement represents the fundamental difference between an azimuthing thrus... Q454:Which statement is true concerning a liquid desiccant cargo-hold dehumidificatio... Q253:Referring to the illustrated huddling-chamber safety valve, what statement conce... Q499:A reading of 0.625 inch on a micrometer with a 2 to 3 inch range would be equal ...
Ready to test your knowledge?
Take a General Subjects - Assistant Engineer Practice ExamOfficial Resources