Aux 1 Unit 9 Q9

1 / 10

How does the hydraulic system ensure that the rotary vane unit can move the rudder both to port and to starboard?

D) By manually adjusting the rudder when moving to port

C) By increasing the hydraulic fluid pressure only when moving to starboard

B) By reversing the flow of hydraulic fluid through the directional control valve to apply pressure to the appropriate side of the rotary vane unit

A) By using separate pumps for port and starboard movement

2 / 10

What is the primary advantage of using a rotary vane steering gear system compared to other types of steering gear?

C) It eliminates the need for hydraulic fluid.

A) It increases the vessel's speed.

D) It reduces the need for regular maintenance.

B) It provides a compact design with smooth and efficient steering control.

3 / 10

In a rotary vane steering gear system, how does hydraulic fluid move the rudder to the desired position?

A) By increasing the temperature of the hydraulic fluid

D) By manually adjusting the rudder angle

B) By applying pressure to the vanes within the rotary vane unit, causing the rudder to rotate to the desired angle

C) By reducing the hydraulic fluid pressure

4 / 10

Which component in the rotary vane steering gear system is responsible for determining the direction in which the rudder will move?

D) The feedback mechanism

B) The directional control valve

C) The rotary vane unit itself

A) The hydraulic pump

5 / 10

What is the primary function of the directional control valve in a valve-operated, rotary vane steering gear system?

C) To monitor the temperature of the hydraulic fluid

A) To increase the speed of the rudder movement

D) To convert hydraulic energy into mechanical energy

B) To direct the flow of hydraulic fluid to the appropriate side of the rotary vane unit, depending on the desired rudder angle

6 / 10

What role does the rotary vane unit play in the steering gear system?

C) It cools down the hydraulic fluid

B) It converts the hydraulic pressure from the directional valve into rotary motion to move the rudder

D) It monitors the rudder angle

A) It generates hydraulic pressure

7 / 10

How does the feedback mechanism work in conjunction with the directional control valve in a rotary vane steering gear system?

A) It increases the pressure of the hydraulic fluid.

B) It sends signals to the directional control valve to stop or reverse fluid flow when the rudder reaches the desired angle.

D) It manually adjusts the rudder position.

C) It reduces the vessel's speed.

8 / 10

Why is it important for the hydraulic fluid in a rotary vane steering gear system to be kept at the proper pressure?

A) To ensure the rudder moves smoothly and with the necessary force to achieve the desired steering angle

C) To reduce the vessel's fuel consumption

B) To increase the speed of the vessel

D) To eliminate the need for manual steering

9 / 10

In a valve-operated, rotary vane steering gear, what prevents the rudder from moving too far beyond the desired angle?

B) Mechanical stops within the rotary vane unit and pressure relief valves in the hydraulic system

D) The size of the rotary vane unit

A) The vessel's speed

C) The temperature of the hydraulic fluid

10 / 10

What happens to the hydraulic fluid after it has been used to move the rotary vane unit in the steering gear system?

C) It remains in the rotary vane unit

D) It evaporates

A) It is discharged overboard

B) It is cooled and then recirculated back to the hydraulic reservoir

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