Write short notes on the following:

(a) Need to ensure that D.O. service tanks are not heated beyond a certain temperature (4)

(b) Importance of the level of the F.W. compensating tank for jacket cooling of main engines as an indicator of impending trouble (4)

(c) Need to check remote stop of all F.O. installations regularly (4)

(d) Necessity for a proper check of all engine room parameters before taking over of watch (4)