ice and rain protection

#1. The electrical supply to the propeller blades for de-icing purposes:

• Ais controlled to give an intermittent supply.
• Bmust be taken directly from the APU generator.
• Cmust only be selected on for short periods.
• Dis continuous to all blades.

#2. Propeller blade heating elements are:

• Afitted only to the thin outer sections where maximum ice accretion occurs.
• Bfitted only to the thick inner section where minimum ice accretion occurs.
• Cusually fitted to the thick section but sometimes a second element is fitted to a mid section.
• Dfitted to the complete leading edge.

#3. When an aircraft is de-iced prior to departure, if the temperature is 0 C in precipitation, which type of fluid and application method will provide the longest holdover period:

• AType I fluid at 100% cold spray application.
• BType II fluid diluted to 50% hot spray application.
• CType I fluid diluted to 50% hot spray application.
• DType II fluid at 100% cold spray application.