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PPL Video Lectures (10 Jul 2020)

PPL Video Lectures covering Aerodynamics, General Knowledge, Performance, Meteorology And Navigation are now available through our website see front page for details.

× Welcome to the IREX question and answer forum. Please feel free to post your questions but more importantly also suggest answers for your forum colleagues. Bob himself or one of the other tutors will get to your question as soon as we can.

Icing in thick altostratus at -2°C

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Star Alliance created the topic: Icing in thick altostratus at -2°C

Hi all, a quick question regarding icing:
You are cruising in thick altostratus cloud where the outside air temperature is -2°C. What type of icing is most likely to occur?
A.rime ice
B.clear ice
C.both rime and clear

I saw this question from previous post. I would go for C, because the word ”thick ” means strong vertical development which can form large droplet. But someone says the answer A)rime ice only is correct.
Can’t find a solid answer. Can anyone help?
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bobtait replied the topic: Icing in thick altostratus at -2°C

Clear ice would be correct. If that is one of my questions, can you let me know where you found it.

Bob
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Star Alliance replied the topic: Icing in thick altostratus at -2°C

Hi Bob,
Thanks for your reply! This question isn't from your book, maybe it's a feedback from CASA or practice exam.

In the booklet from BOM, it says "light to moderate rime ice , clear ice possible in lower level " . So why don't we go for both rime and clear ice?
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Star Alliance replied the topic: Icing in thick altostratus at -2°C

Sorry Bob, I find where it's from. It's on page311, reversion questions set 1 No.9. The answer you give is clear ice only. But some guys say rime and clear should be better.
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