Discuss the suitability and limitations of the following insulating materials for use on board ships and state suitable application in each case. Particular reference should be made to the influence of environment, and its effect, on deterioration in service:

(a) Pure rubber (3)

(b) Paper (3)

(c) Mica (3)

(d) Asbestos (3)

(e) Porcelain (2)

(f) Ebonite (2)