EK Motor Dec 2018 (Q4)

With reference to diesel hybrid SOx scrubber systems:  

(a) State the fluids used in the open and closed loops of the scrubber, explaining how these fluids are controlled to meet the scrubbing demands at different engine loads (6)  

(b) State the circumstances under which open loop scrubbing would be used and closed loop scrubbing would be used (2)  

(c) describe how the effective SOx neutralising effect of the fluid used in the closed loop system is maintained during long operating periods and how pollution of the sea is avoided (8)

Dec 2018 (Q4)