Aux 1 Unit 10 Q11

1 / 10

What is a pilgrim nut?

A) A type of fastening used to secure engine components

D) A small fastening nut for electrical components

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

C) A standard nut used in general construction

2 / 10

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

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

A) It requires no maintenance.

D) It is lightweight and easy to handle.

C) It is inexpensive to produce.

3 / 10

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

A) Its lightweight design

C) Its small size

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

D) Its electrical conductivity

4 / 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.

5 / 10

What material is typically used to manufacture a pilgrim nut?

D) Aluminum

A) Plastic

C) High-strength alloy steel

B) Mild steel

6 / 10

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

A) It increases the vessel's speed.

C) It reduces the need for lubrication.

D) It eliminates the need for any maintenance.

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

7 / 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

B) By welding the propeller to the shaft

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

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

8 / 10

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

A) The color of the nut

D) The temperature of the shaft

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

9 / 10

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

C) The propeller is welded to the shaft.

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

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

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

10 / 10

In what application is a pilgrim nut most commonly used?

A) Securing electrical panels

C) Fitting keyless propellers to marine shafts

B) Attaching furniture components

D) Joining metal beams in construction

Your score is