Aux 1 Unit 8 Q6

1 / 10

What type of contaminant is introduced by degraded hydraulic fluid?

A) Metal particles and sludge

D) Moisture vapor

C) Heat energy

B) Oxygen molecules

2 / 10

How can metal particles and sludge, introduced by degraded hydraulic fluid, be eliminated from the system?

A) By increasing the system pressure.

B) By using fine-mesh filters and regularly replacing the hydraulic fluid.

C) By adding more hydraulic fluid to dilute the contamination.

D) By running the system at higher temperatures.

3 / 10

What is an effective step to eliminate water contamination in a hydraulic system?

A) Increase system pressure to evaporate the water.

D) Ignore the water contamination as it will evaporate on its own.

C) Add more hydraulic fluid to dilute the water.

B) Use a water-absorbing filter or regularly drain the water from the system.

4 / 10

What should be done to prevent the introduction of contaminants during hydraulic system maintenance?

B) Increase system pressure before starting maintenance.

A) Use clean tools and ensure the work area is free of dust and debris.

D) Perform maintenance without wearing protective gloves.

C) Reduce the amount of hydraulic fluid in the system.

5 / 10

What is a recommended method to remove air bubbles from a hydraulic system?

D) Add more hydraulic fluid to dissolve the air bubbles.

B) Bleed the system thoroughly and check for leaks in the suction line or fittings.

C) Reduce the system temperature to condense the air.

A) Increase the system pressure to force the air out.

6 / 10

Why is it important to regularly inspect and maintain hydraulic filters?

D) To increase the pressure within the system.

A) To allow contaminants to build up for better filtration.

B) To ensure filters do not become clogged, which could lead to reduced efficiency and increased contamination.

C) To increase the temperature of the hydraulic fluid.

7 / 10

Which of the following is a common contaminant that can affect the cleanliness of a hydraulic system?

B) Water

C) Oxygen

D) Hydrogen gas

A) Pure nitrogen

8 / 10

How can dirt and dust particles be effectively eliminated from a hydraulic system?

C) Replace hydraulic fluid more frequently.

B) Install high-quality filters and ensure all components are clean during maintenance.

D) Allow the system to run continuously to filter out the particles naturally.

A) Increase the fluid temperature.

9 / 10

Which contaminant can cause cavitation and spongy operation in a hydraulic system?

A) Air bubbles

D) Argon

C) Carbon dioxide

B) Nitrogen gas

10 / 10

What is another common contaminant found in hydraulic systems on board vessels?

B) Dirt and dust particles

D) Pure oxygen

A) Sand

C) Helium

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