Aux 1 Unit 8 Q6

1 / 10

What type of contaminant is introduced by degraded hydraulic fluid?

A) Metal particles and sludge

C) Heat energy

D) Moisture vapor

B) Oxygen molecules

2 / 10

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

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

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

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

C) Reduce the system temperature to condense the air.

3 / 10

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

D) By running the system at higher temperatures.

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

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

A) By increasing the system pressure.

4 / 10

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

D) Pure oxygen

B) Dirt and dust particles

C) Helium

A) Sand

5 / 10

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

B) Nitrogen gas

C) Carbon dioxide

D) Argon

A) Air bubbles

6 / 10

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

A) Increase system pressure to evaporate the water.

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

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

C) Add more hydraulic fluid to dilute the water.

7 / 10

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

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

B) Increase system pressure before starting maintenance.

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

D) Perform maintenance without wearing protective gloves.

8 / 10

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

C) To increase the temperature of the hydraulic fluid.

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

D) To increase the pressure within the system.

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

9 / 10

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

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

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

C) Replace hydraulic fluid more frequently.

A) Increase the fluid temperature.

10 / 10

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

A) Pure nitrogen

B) Water

D) Hydrogen gas

C) Oxygen

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