CLOUDS

#18. Cloud of operational significance has base below _____ m or below the highest minimum sector altitude, which is greater

• A1500
• B2000
• C1000

#19. AC cloud with cumuliform protuberances are indicative of

• AStability
• BInstability
• CNeurality

#20. Hail may be experienced under the anvil of a CB

• ATrue
• BFalse