CGI Aircraft Systems & Instruments 3

Question 1

What is the primary purpose of the aircraft electrical bus?

Accepted Answer

To distribute electrical power from the alternator/battery to aircraft systems

Answer

The electrical bus is a common junction that distributes power from the alternator and battery to all electrical systems and avionics.

Question 2

What is the purpose of the aircraft's ammeter?

Accepted Answer

Indicates the rate of current flow in or out of the electrical system

Answer

The ammeter shows whether the alternator is producing sufficient current (positive indication) or whether the battery is discharging (negative indication).

Question 3

Which of the following describes 'absolute altitude'?

Accepted Answer

Altitude above the terrain directly below the aircraft (AGL)

Answer

Absolute altitude is the true height of the aircraft above the terrain or surface directly beneath it, measured in feet AGL.

Question 4

What is 'best glide speed' (Vbg)?

Accepted Answer

Airspeed that provides maximum glide distance over the ground in an engine-out situation

Answer

Best glide speed maximizes the lift-to-drag ratio, giving the greatest horizontal distance for a given altitude loss during an engine-out glide.

Question 5

What effect does lowering flaps have on the stall speed?

Accepted Answer

Stall speed decreases because of increased lift at a given airspeed

Answer

Lowering flaps increases the wing's camber and lift coefficient, allowing the wing to stall at a lower airspeed.

CGI - Certified Ground Instructor Practice Test

CGI - Certified Ground Instructor Practice Test

CGI Aircraft Systems & Instruments 3