Aux 1 Unit 10 Q2

Correct Answer: C) Zero pitch (neutral position)

Explanation: The typical failsafe position for a CPP is zero pitch, or the neutral position. This position minimizes thrust and prevents the vessel from moving forward or astern unintentionally in the event of a hydraulic system failure, enhancing safety.

Correct Answer: B) Uncontrolled vessel movement

Explanation: The primary safety concern that the failsafe position addresses is preventing uncontrolled vessel movement. By defaulting to zero pitch, the system minimizes the risk of the vessel moving forward or astern unintentionally, which is crucial for safety.

Correct Answer: B) It ensures smoother transitions between neutral and full ahead or astern positions, enhancing maneuverability.

Explanation: Maintaining a small amount of pitch in neutral ensures smoother transitions when changing from neutral to full ahead or astern. This enhances maneuverability, particularly in situations requiring precise control, such as docking.

Correct Answer: B) It prevents the vessel from unintended movement if the control system fails, avoiding potential collisions or groundings.

Explanation: The zero pitch position is considered failsafe because it prevents unintended vessel movement if the control system fails. This minimizes the risk of collisions or groundings, ensuring the vessel's safety.

Correct Answer: B) To avoid complete loss of propulsion control and to allow for immediate response when needed

Explanation: Maintaining a small pitch in the neutral position ensures that there is no complete loss of propulsion control. This allows for an immediate response if the vessel needs to quickly change direction or speed.

Correct Answer: B) To prevent cavitation and provide a slight thrust that aids in maintaining control of the vessel

Explanation: Maintaining a small amount of pitch in the neutral position helps prevent cavitation (the formation of vapor cavities in a liquid) and provides a slight thrust. This slight thrust helps maintain control of the vessel, especially when maneuvering at low speeds or in confined spaces.

Correct Answer: B) Using a manual hand pump or mechanical lever system to move the blades

Explanation: A common method for manually adjusting the pitch in the event of a hydraulic failure is using a manual hand pump or a mechanical lever system. This allows the crew to manually control the blade angle, enabling the vessel to continue operating safely.

Correct Answer: A) It would cause the vessel to move forward uncontrollably.

Explanation: Full ahead pitch would cause the vessel to move forward uncontrollably if the system fails, leading to dangerous situations, such as collisions or groundings. Therefore, it is not chosen as the failsafe position.

Correct Answer: A) By manually adjusting the propeller blades using a mechanical override

Explanation: If the hydraulic system fails, pitch can be restored by manually adjusting the propeller blades using a mechanical override. This allows the crew to set the blades to a specific pitch, ensuring that the vessel can still be maneuvered.

Correct Answer: B) To ensure that the vessel can still be maneuvered if the hydraulic system fails, maintaining control and safety

Explanation: Having a manual override system for pitch adjustment is crucial because it ensures that the vessel can still be maneuvered if the hydraulic system fails. This maintains control and safety, particularly in emergency situations.