Question

How many Primary Flight Displays are present in typical civil aircraft cockpit?

(a) 1

(b) 2

(c) 4

(d) 3

I had been asked this question during an interview.

This is a very interesting question from Head Down Display Technology in section Displays and Man-Machine Interaction of Avionics

Answer 1

Correct choice is (b) 2

Explanation: A typical civil aircraft cockpit will have 4 displays, 2 Primary Flight Displays, and 2 Multi-Functional Displays. The 2 PFDs are duplicated (i.e; they display the exact same information) one for the pilot and one for the co-pilot. The other two displays can be chosen what to show either by the pilot or the copilot.