Chief Engineer Responsibilities During Bunkering Operation

(By Kamal Hossain, Chief Engineer)

Pollution prevention

  1. Pre-bunkering meeting should be held , quantity , grade and distribution plan to be drawn up.
  2. By considering of volume allowance is 10 ~ 15 % for expansion , all tanks to be filled up to 85 % maximum.
  3. Clear over flow tank , drain tank .
  4. Top up settling and service tanks.
  5. Clean filters and sight glass of bunker line.
  6. Keep level indicator, sounding gauge and pressure gauge good working order.
  7. Arrange quick communication between bunker point and control .
  8. Check scuppers plug condition.
  9. Keep cleaning materials and chemical near by bunker point.
  10. Alert oil pollution control team as per contingency plan.
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CoC Oral Exam Preparation (Part- 4) – Lub Oil & Fuel Oil

MLT
Image Credit: lube-oil.in

Lubricating Oil

Viscosity:
1. A measure of internal resistance to flow.
2. Viscosity of an oil changes with temperature, falling when temperature rises and vice versa.
3. For crankcase oil, viscosity is between 130 – 240 Sec. Redwood No. 1 at 60°C.
4. For cylinder oil, viscosity is 12.5 – 22 Cst.

Viscosity Index, VI:
1. The rate of change of viscosity of an oil, in relation to change of temperature.
2. Oil of low VI has greater change of viscosity with change in temperature,
than the oil of high VI.
3. For crankcase oil, VI is between 75 – 85; For cylinder oil, VI is 85.
4. Highest VI of mineral oils is about 115 and with special additives, this may be raised to about 160.
5. Hydraulic oils, used in remote control hydraulic circuits must have very high VI; otherwise erratic response to the controls can be troublesome. (Telemotor hydraulic system oil has VI of 110.)
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