Compass

Question 1

The Earths magnetic field can be broken down into two components, ___ and ___

Answer 1

H and Z

Question 2

Dip is compensated for in the magnetic compass by use of?

Answer 2

Pendulous suspension with a CG lower than the pivot

Question 2

Compass deviation can be compensated for by carrying out a?

Answer 2

Compass swing

Question 2

The remote indicating compass uses a ____ valve to detect magnetic fields

Answer 2

Flux valve

Question 3

Magnetic compass turning error is greatest on what headings?

Answer 3

turning through North and South

Question 4

The acronym ONUS referes to what compass error?

Answer 4

Turning Error (Overshoot North Undershoot South)

Question 5

The typical magnetic compass uses a (permanent,temporary,soft) magnet.

What is the correct answer?

Answer 5

Permanent Magnet

Question 5

The remote indicating compass works on the principle of _____ induction

Answer 5

electromagnetic induction

Question 6

State at lest three pre-flight serviceability checks you can perform on the magnetic compass

Answer 6

- Check it is secure and level

- Check glass is not cracked or leaking

- The liquid in the bowl should be free from bubbles

- Check the deviation card is present

- Check it responds correctly while taxiing in a turn

- Check the compass against runway heading on line-up

Question 8

Magnetic compass acceleration error is greatest on ____ and ____ headings and least or nil on ____ and ____ headings

Answer 8

greatest on East and West, least or nil on North and South headings

Question 9

Which component of the Earths magnetic field provides the force to align the compass needle with magnetic North/South?

Answer 9

Component H

Question 10

Angle of Dip (increases,decreases) towards the poles.

What is the correct answer?

Answer 10

Increases

Question 11

When turning using the magnetic compass from 090° through to 000° you should (overshoot, undershoot) by ___° and roll out on ___°

Answer 11

overshoot by 30° and roll out on 330°

Question 13

Magnetic field component ___ reduces in strength with reduced distance from the poles (getting nearer to the poles)

Answer 13

Component H

Question 14

Which component of the Earths magnetic field provides the force to tilt the needle towards the nearest pole?

Answer 14

Component Z

Question 15

The angle between the resultant of Component H & Z and Component Z is known as?

Answer 15

Angle of Dip

Question 17

Component H is (parallel, right angles) to Earth surface and Component Z is (parallel, right angles) to Earth surface.

Which combination gives the correct answer?

Answer 17

Component H is parallel, Component Z is at right angles

Question 18

What causes acceleration error in the magnetic compass?

Answer 18

Is due to the residual dip and the CG being offset toward North of the pivot point

Question 19

Define magnetic deviation

Answer 19

The difference between magnetic direction and the compass direction

Question 20

You can check the serviceability of the compass while taxiing the aircraft, when you turn left on the ground the compass reading must (increase, decrease).

What is the correct answer?

Answer 20

Decrease