| The coldest air in front of and the warm air behind the occlusion |
| The less cold air is above ground level. |
| The coldest air in front of and the less cold air is behind the occlusion |
| The warm air mass is above ground level. |
New: Boost Your Preparation!
On our site, you'll now find our new PRO Simulation Panel! Here are some of the exclusive benefits you get by unlocking it:
Prefer to practice on your smartphone? π± Discover the Mobile APPs.
You can still continue with the free version, which gives you access to 75% of the questions with a limit of 3 simulations per hour.
You have reached the free limit
Upgrade to the PRO version to practice without limits and unlock all features for a complete preparation.
Upgrading to PRO gives you access to:
...and much more!
π± Or discover the Apps to study offline too
Your next free test will be available in: 1 ora
QuizVds.it - Facebook - Contact Us - Donation - Cookie Policy - Privacy Policy - Terms and Conditions - Partner