Magnetic Compass bowls are filled with a liquid to?

• Retard precession of the float.

• Reduce deviation errors.

• dampen the oscillation of the float.

What is the fixed line mark attached to the compass bowl of a magnetic compass called?

• Reeder Line

• Lubber Line

• Reference Line

Which condition would be most likely to cause excessive vacuum in a vacuum system

• Vacuum pump overspeed.

• Vacuum relief valve improperly adjusted.

• Vacuum relief spring weak.

How many of the following are controlled by gyroscopes?

1. Attitude indicator

2. Heading indicator

3. Turn needle of the turn-and-slip indicator

• 3

• 2

• 1

A tun coordinator instrument indicates?

• The longitudinal attitude of the aircraft during climb and decent.

• The need of corrections in pitch and bank

• Both roll and yaw.

A synchro transmitter is connected to a synchro receiver

• Mechanically through linkage

• Electronically without wires.

• Electrically with wires.

The maximum deviation (during flight) permitted on a compensated magnetic direction indicator installed on an aircraft certificated under 14 CFR Part 23 is

• 6 degrees

• 8 degrees

• 10 degrees

Which of the following causes aircraft magnetic compass inaccuracies may be compensated for by mechanics?

• Deviation.

• Magnetic Compass.

• Variation.

In VHF navigation when is the signal the weakest

• South

• West

• North

In VHF navigation when is the signal the strongest?

• North

• East

• West