Question id 661 - Aircraft General Knowledge - Airframe, Systems, Powerplant - ATPL - Airline Transport Pilot license

A torsion box is formed by wing spars, ribs and wing skin reinforced by stringers.
The slats are a part of the torsion box.
A semi-monocoque structure consists of the skin and frames.
A wing main spar consists of a web with stringers.

Training tests and timed exam simulations ATPL - Airline Transport Pilot license