Question 328General Subjects - Assistant Engineer70% to pass
Concerning the operating mechanism of a controllable-pitch propeller, what statement is true?
AI Explanation
The correct answer is D.
The explanation is as follows:
1) If the hydraulic actuator is inboard (located inside the vessel), a mechanical pull-push rod is located within the propeller shaft to actuate the blade rotating mechanism. If the hydraulic actuator is outboard (located outside the vessel), hydraulic oil pipes are located within the propeller shaft to transmit the hydraulic pressure and actuate the blade rotating mechanism.
2) This is the standard configuration for a controllable-pitch propeller system, where the location of the hydraulic actuator determines whether a mechanical or hydraulic system is used within the propeller shaft.
3) The other options are incorrect as they do not accurately describe the relationship between the actuator location and the type of mechanism within the propeller shaft.
Related Questions
#326 Which of the following propulsor types does not require the use of a separate rudder for steerage? #327 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? #329 The gears used for virtually all marine propulsion reduction gear sets are of what type? #330 Which of the listed reduction gear sets has the input and output shafts in-line with one another? #331 What is a shipboard application for a worm gear drive?