Aux 1 Unit 9 Q3

1 / 10

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

A) The system will operate normally.

C) The steering gear will become more responsive.

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

D) The hydraulic fluid will cool down.

2 / 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.

A) It increases the system's pressure.

D) It cools down the hydraulic fluid.

3 / 10

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

D) To reduce the hydraulic fluid temperature

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

A) To increase the speed of the vessel

4 / 10

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

D) By closing the flow of hydraulic fluid

C) By increasing the speed of fluid flow

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

A) By maintaining a constant high pressure

5 / 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

B) In the hydraulic fluid reservoir

D) On the rudder

C) In the discharge line or near the hydraulic actuator

6 / 10

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

D) By allowing fluid to bypass the pump

A) By increasing the speed of the pump

C) By reducing the hydraulic fluid level

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

7 / 10

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

C) To increase the hydraulic fluid temperature

A) To ensure the steering gear operates slowly

D) To ensure the rudder remains stationary

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

8 / 10

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

A) To allow fluid to flow freely in both directions

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

C) To increase the pressure of the hydraulic fluid

9 / 10

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

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

A) Increased efficiency of the steering gear

D) The hydraulic fluid would flow more efficiently

C) The steering gear would operate faster

10 / 10

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

B) In the discharge line of the pump

A) In the hydraulic fluid reservoir

C) In the suction line of the pump

D) On the rudder stock

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