CGI Aircraft Systems & Instruments

Question 1

Which flight instrument is powered by the pitot-static system?

Accepted Answer

Airspeed indicator

Answer

The airspeed indicator uses the difference between pitot (ram) pressure and static pressure to display indicated airspeed.

Question 2

What does the VSI (Vertical Speed Indicator) display?

Accepted Answer

Rate of change of altitude in feet per minute

Answer

The VSI measures the rate of change in static pressure to display climb or descent rate in feet per minute.

Question 3

Which gyroscopic instrument is MOST susceptible to precession error?

Accepted Answer

Heading indicator

Answer

The heading indicator (directional gyro) is most susceptible to precession and must be periodically realigned with the magnetic compass.

Question 4

What is the purpose of the carburetor heat system?

Accepted Answer

Prevent or eliminate carburetor ice by routing warm air to the carburetor

Answer

Carburetor heat routes warm air from around the exhaust manifold into the carburetor to melt ice or prevent its formation.

Question 5

What does a 'rich' mixture setting mean in a piston engine?

Accepted Answer

More fuel relative to stoichiometric air-fuel ratio

Answer

A rich mixture contains more fuel than the chemically ideal ratio, which provides engine cooling but reduces fuel efficiency.

CGI - Certified Ground Instructor Practice Test