Tricky IMC Question
Hi All,
For some reason, I always find this particularly IMC style question relatively tricky. Even when I have been given the answer, I find it difficult to reverse engineer the question to try and find that particular answer.
Can someone please throw some light on this type of question?
Question)
During a descent, the static vent becomes blocked, how would this effect the Altimeter, VSI and ASI?
Altimeter | VSI | ASI
1. Read Normal | Read Normal | Under Read
2. Read Normal | Read Normal | Over Read
3. Under Read | Remain Static | Over Read
4. Over Read | Over Read | Under Read
The correct answer, apparantly is 1...
As to my understanding, Vertical Speed Indicators read differential pressures changes from the static system, so if this is blocked, wouldn't this remain static (i.e No Pressure Changes measured), And also wouldn't the Altimeter Over read, (i.e the instrument still reads the less dense atmosphere of when the instrument was blocked)?
Any advice on this question would be greatly appreciated!