Degaussing Flashcards

1
Q

Degaussing systems are used aboard ship for which of the following reasons?

A

To help reduce the ships distortion of the earths magnetic field

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2
Q

Magnetic lines of force interact with ferrous materials in what way?

A

They distort the background field into areas of increased or decreased magnetic strength

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3
Q

The earth’s magnetic field lines of force enter the surface at what location?

A

The south magnetic pole

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4
Q

The earths magnetic field is made up of what components?

A

The H and Z zones

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5
Q

The magnitude of a ships permanent magnetism depends on which of the following conditions?

A

the earths magnetic field at the place where the ship was built

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6
Q

Navy ships are depermed for which of the following reasons

A

To decrease the permanent magnetization of the ship

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7
Q

A ship’s induced magnetism depends on which of the following components?

A

The strength of the earths magnetic field

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8
Q

The magnitude of the vertical field component of a ship’s induced magnetization depends on what factor?

A

Magnetic latitude

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9
Q

What type of information is located in the degaussing folder?

A

Magnetic treatment of the ship

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10
Q

At what point is the degaussing folder prepared?

A

During initial calibration

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11
Q

Where is the equipment that measures the magnetic field of a ship, at a degaussing range typically located?

A

At or near the bottom of the channel

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12
Q

A ship is check ranged for which of the following reasons?

A

To ensure the current settings are adequate

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13
Q

What type of power source energizes degaussing coils?

A

Direct current

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14
Q

Which of the degaussing coils encircle the ship, usually at the water line

A

M

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15
Q

Which of the following degaussing coils encircles the forward one-fourth to one-third of a ship?

A

F

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16
Q

The FI-QI degaussing coils counteract which of the following fields?

A

Longitudinal induced magnetism

17
Q

What equipment is used to automatically control the current of the degaussing system?

A

Gyrocompass and magnetometer

18
Q

A magnetometer that controls the induced field currents receives a signal from what total number of axes?

A

Three

19
Q

Magnetometer-controlled AUTODEG equipment has what total number of modes of operation?

A

Two

20
Q

In the event of loss of gyro signal to gyro-controlled AUTODEG equipment, the operator can adjust the current for which if the following coils?

A

A and FI-QI

21
Q

What naval ships’ technical manual chapter contains detailed information on markings used in the degaussing systems?

A

475

22
Q

What method is used to mark the insulating sleeving of degaussing conductors?

A

Branding

23
Q

Inside of a connection box, what is the required length for all conductors?

A

1 and one half times the length to the farthest terminal

24
Q

What method is the fastest and easiest way to check connection boxes or through boxes for moisture?

A

Remove the drain plug