the commonly used matterial for shielding or screening manegment
hello,
You can ask it to your seniors or the respective teacher or guide. They can help you out better. they are in that profession more than you do and they can help you out with an sureity as they have already gone through it.
there are internal matters of an institute and these are not disclosed in the public but yes shared into intra-social connections. so only the authorized persons and the candidates will know.
So try to ask them and they will guide you better.
Hope it helps!