Q.growing fruit trees
One of our apple trees uprooted in high winds we are replacing w 2 pear trees… however the remaining apple tree apples had apple scab…my question, will our newly planted pear trees have/get scab also?

According to these articles, apple scab and pear scab are caused by different fungal species, and apple scab cannot infect pears:
http://ipm.ucanr.edu/PMG/PESTNOTES/pn7413.html
http://www.dpi.nsw.gov.au/content/agriculture/horticulture/pomes/apple-and-pear-scab