Aux 1 Unit 11 Q1

1 / 10

After the coupling is removed, what should be done with the hydraulic sleeve?

A) It should be discarded.

C) It should be heated for expansion.

D) It should be compressed to its original size.

B) It should be inspected for wear or damage and cleaned before reinstallation.

2 / 10

What additional check is often used to ensure the push fit of a hydraulic sleeve-type coupling is complete?

A) The use of torque measurements to confirm the sleeve has fully engaged

C) Increasing the engine speed to test the fit

B) A visual inspection for even spacing between the coupling and shaft

D) Applying additional hydraulic pressure until the sleeve bursts

3 / 10

What is the first step in the removal procedure of a hydraulic sleeve-type coupling on a main propulsion shaft?

C) Relieving the hydraulic pressure in the coupling

A) Applying heat to the coupling

B) Draining the hydraulic fluid from the system

D) Removing the shaft entirely

4 / 10

What role does hydraulic pressure play in determining the completion of the push fit during reassembly?

D) The hydraulic system should be turned off.

B) The hydraulic pressure should reach a specified level, indicating that the coupling has fully seated.

A) Hydraulic pressure is irrelevant in this process.

C) The pressure should be as low as possible.

5 / 10

How is the hydraulic oil typically injected into the sleeve to facilitate the removal of the coupling?

C) By using compressed air

A) Through a manual hand pump

B) Through high-pressure hydraulic pumps connected to the coupling’s dedicated ports

D) By gravity feeding the oil into the sleeve

6 / 10

What safety precautions should be taken during the removal of a hydraulic sleeve-type coupling?

A) None, as the procedure is entirely safe.

D) Avoid using any protective equipment to allow for greater dexterity.

B) Ensure that all hydraulic pressure is relieved before attempting removal, and use proper tools to avoid personal injury or equipment damage.

C) Apply as much force as possible to remove the coupling quickly.

7 / 10

During the reassembly of a hydraulic sleeve-type coupling, how is it typically determined that the push fit is complete?

C) By applying heat to the coupling

B) By observing the alignment marks on the coupling and shaft

D) By measuring the hydraulic pressure

A) By measuring the expansion of the sleeve

8 / 10

Why is it important to use a hydraulic puller when removing the coupling?

B) It ensures even pressure is applied, preventing damage to the shaft and coupling.

D) It increases the grip on the shaft.

A) It is faster than other methods.

C) It decreases the temperature of the coupling.

9 / 10

Once hydraulic pressure is relieved, what is typically done next to facilitate the removal of the coupling?

A) The coupling is struck with a hammer to loosen it.

D) The shaft is rotated to dislodge the coupling.

B) Hydraulic oil is injected to expand the sleeve, reducing the frictional grip on the shaft.

C) The coupling is immediately pulled off by hand.

10 / 10

What should be done after the hydraulic sleeve has been expanded and loosened from the shaft?

B) Slowly and evenly pull the coupling off the shaft using a hydraulic puller or similar tool.

A) Apply heat to further expand the sleeve.

D) Rotate the shaft until the coupling falls off.

C) Strike the coupling with a hammer to remove it.

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