Aux 1 Unit 9 Q3

1 / 10

What is a potential consequence of not using a non-return valve in a hydraulic steering system?

C) The steering gear would operate faster

A) Increased efficiency of the steering gear

B) The idle pump may start motoring, leading to wear and potential damage to the pump

D) The hydraulic fluid would flow more efficiently

2 / 10

How does a pressure relief valve prevent the idle pump from motoring when the system pressure increases?

C) By increasing the speed of fluid flow

D) By closing the flow of hydraulic fluid

A) By maintaining a constant high pressure

B) By diverting excess fluid back to the reservoir, reducing pressure in the line that could otherwise cause the pump to motor

3 / 10

What could happen if the pressure relief valve fails to function properly in a hydraulic steering system?

B) Excessive pressure could cause the idle pump to motor, leading to potential damage and inefficiency.

A) The system will operate normally.

C) The steering gear will become more responsive.

D) The hydraulic fluid will cool down.

4 / 10

Where is the non-return valve typically installed to prevent the idle pump from motoring?

B) In the discharge line of the pump

C) In the suction line of the pump

D) On the rudder stock

A) In the hydraulic fluid reservoir

5 / 10

How does a non-return valve prevent the idle pump from motoring in a hydraulic system?

B) By blocking reverse fluid flow, ensuring that the idle pump does not receive backflow pressure that could cause it to spin

D) By allowing fluid to bypass the pump

C) By reducing the hydraulic fluid level

A) By increasing the speed of the pump

6 / 10

What is the primary function of a non-return (check) valve in a hydraulic steering gear system?

D) To reduce the temperature of the hydraulic fluid

B) To prevent fluid from flowing back into the idle pump, thereby preventing it from motoring

A) To allow fluid to flow freely in both directions

C) To increase the pressure of the hydraulic fluid

7 / 10

Why is it important to prevent the idle pump from motoring in a hydraulic steering gear system?

B) To prevent unnecessary wear and potential damage to the pump and to avoid energy wastage

C) To allow the vessel to maintain a steady course

D) To reduce the hydraulic fluid temperature

A) To increase the speed of the vessel

8 / 10

Why is it important to set the pressure relief valve at the correct pressure in a hydraulic steering system?

A) To ensure the steering gear operates slowly

D) To ensure the rudder remains stationary

C) To increase the hydraulic fluid temperature

B) To protect the hydraulic components from excessive pressure and to prevent the idle pump from being driven by high pressure

9 / 10

What role does a pressure relief valve play in preventing the idle pump from motoring in a hydraulic steering system?

C) It directs fluid flow back to the reservoir.

B) It releases excess pressure from the system, preventing it from driving the idle pump.

D) It cools down the hydraulic fluid.

A) It increases the system's pressure.

10 / 10

Where is the pressure relief valve typically located in a hydraulic steering system to prevent motoring of the idle pump?

A) In the suction line of the pump

C) In the discharge line or near the hydraulic actuator

B) In the hydraulic fluid reservoir

D) On the rudder

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