Question id 308 - Aircraft General Knowledge - Airframe, Systems, Powerplant - ATPL - Airline Transport Pilot license

Rain repellent should never be sprayed onto the windshield unless the rainfall is very heavy
The alcohol de-icing system for cockpit windows is also suitable for rain protection
The electric de-icing system for cockpit windows is also suitable for rain protection
Wipers Are Sufficient Under Heavy Rain Conditions To Provide Adequate View Through The Cockpit Windows.

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