CPL Acft Tech - Magnetic compass

Lines of magnetic force on the earth run between...

• the true north and south poles

• the magnetic north and south poles

• the isogonal line at the north pole and the agonic line at the south pole

• the agonic line at the north pole and the isogonal line at the south pole

When must a compass swing be performed?

Select all options that apply

• Every 50 hr check

• Every 100 hr check

• After an engine change

• After an aircraft is struck by lightning

• After a new transponder is installed

A line joining points of equal magnetic variation is called a/an..

• isogonal

• isoclinal

• deviation line

• agonic variation

What is the purpose of the fluid in a compass?

Select all that apply

• Damping

• Buoyancy

• Lubrication

• Cooling

In the southern hemisphere, you are on a magnetic heading of 090 and wish to turn left onto North. What compass heading should you turn to?

• 330 degrees

• 000 degrees

• 030 degrees

• 060 degrees

Acceleration error exists due to...

• pendulous suspension

• residual dip

• deviation

• variation

If you were flying on a heading of 180 degrees magnetic and accelerated your aircraft from 90 to 130 knots, what would you expect to see the compass do?

• Nothing

• Swing to the North

• Swing to the East

• Swing to the West

Component Z is the...

• vertical component of the earth's magnetic field which acts on a compass needle

• horizontal component of the earth's magnetic field which acts on a compass needle

• allowance for residual dip made in the manufacture of the compass

• allowance for the angle of dip made in the manufacture of the compass

Over the equator, the angle of dip is how many degrees

• zero

• 30

• 45

• 90

Select all of the serviceability checks applicable to an aircraft compass

• compass liquid has no bubbles

• mounting is secure

• compass liquid is clear

• deviation adjustment screws are tight

• deviation card is present and in date