Ex. 1. The words below are all associated with icing. Complete the spaces in the diagram using a dictionary if necessary. Some of the words are already filled to help you

Ex. 2. Answer the questions.

1. 
   What weather phenomena can cause ice accretion on the aircraft?
   
2. 
   What happens to the aircraft while flying in icing conditions?
   
3. 
   What parts of the plane are vulnerable to icing?
   
4. 
   Why is icing considered to be one of the most serious hazards in aviation?
   
5. 
   What can ice build-up lead to?
   
6. 
   How can aircraft be prevented from ice accretion?
   
7. 
   What is the difference between deicing and anti-icing procedures?
   
8. 
   Can you explain what 'clean aircraft' concept is?
   
9. 
   How can frozen moisture be removed from the airframe critical surfaces?
   
10. 
    What is 'holdover time'?
    
11. 
    Is holdover time influenced by the ambient temperature?
    
12. 
    What else is it influenced by?
    
13. 
    Are all aircraft equipped with ice protection system?