Aux 1 Unit 10 Q11

1 / 10

Why is it important to use a pilgrim nut for fitting keyless propellers, as opposed to traditional methods?

B) It ensures a precise, uniform application of force, reducing the risk of misalignment or damage to the propeller or shaft.

A) It increases the vessel's speed.

D) It eliminates the need for any maintenance.

C) It reduces the need for lubrication.

2 / 10

What feature of a pilgrim nut allows it to apply high axial force to components like propellers?

D) Its electrical conductivity

C) Its small size

B) The integral hydraulic jack or cavity that allows hydraulic pressure to be applied

A) Its lightweight design

3 / 10

In what application is a pilgrim nut most commonly used?

A) Securing electrical panels

B) Attaching furniture components

C) Fitting keyless propellers to marine shafts

D) Joining metal beams in construction

4 / 10

What material is typically used to manufacture a pilgrim nut?

C) High-strength alloy steel

A) Plastic

D) Aluminum

B) Mild steel

5 / 10

How does a pilgrim nut help in the fitting of a keyless propeller to a shaft?

C) By manually threading the propeller onto the shaft

D) By cooling the propeller and shrinking it onto the shaft

B) By welding the propeller to the shaft

A) By applying hydraulic pressure to push the propeller onto the tapered shaft, ensuring a tight fit

6 / 10

What is a pilgrim nut?

A) A type of fastening used to secure engine components

C) A standard nut used in general construction

B) A specialized, large-diameter nut with an integral hydraulic system used for applying high axial force

D) A small fastening nut for electrical components

7 / 10

What happens after the propeller is correctly seated using a pilgrim nut?

B) The nut remains in place to secure the propeller permanently.

A) The hydraulic pressure is released, and the nut is removed, leaving the propeller securely fitted.

C) The propeller is welded to the shaft.

D) The shaft is rotated at high speed to check the fit.

8 / 10

What ensures that the propeller is correctly positioned on the shaft when using a pilgrim nut?

B) The gradual and controlled application of hydraulic pressure, which allows for adjustments to ensure the propeller is seated correctly

C) The speed of the vessel

A) The color of the nut

D) The temperature of the shaft

9 / 10

What is a key benefit of using a pilgrim nut when installing a keyless propeller in a marine environment?

B) It provides a secure, interference fit that is both strong and durable, essential for the high loads experienced in marine propulsion.

A) It requires no hydraulic fluid.

D) It allows the propeller to be easily removed at any time.

C) It is inexpensive and disposable.

10 / 10

What is the main advantage of using a pilgrim nut in marine applications?

C) It is inexpensive to produce.

B) It allows for precise, controlled application of axial force, ensuring secure and accurate fitting of components.

D) It is lightweight and easy to handle.

A) It requires no maintenance.

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