ans1:knowledge is different from understanding because knowledge is acquired when we add the new experiences in the system of old experiences and understanding is independent from old experiences.
ans2: understanding cannot be passed on because it is abstract and it is the new immediate experience
ans3:yes,the knowledge of understanding is possible and it may be passed on by speech,writing or symbols.
ans 4:according to author knowledge of understanding is acquired while understanding is the emotions of the person.
ans 5:i agree with the author,because understanding is not acquired as these are the emotions of a person while knowledge is acquired because it is in the form of concepts