Question: * some ray file extension formats can be opened in binary format only.
Answer: --> * Some RAY file extension formats can be opened in binary format only.

Question: e = integrity (ability to prevent leakage of flames and hot gases)
Answer: --> E = Integrity (ability to prevent leakage of flames and hot gases)

Question: they are determined outside of the model.
Answer:
--> They are determined outside of the model.