Onboard Lubricating Oil Tests

(By Kamal Hossain, Chief Engineer)

(a) Explain how lubricating oil can be tested onboard.

Answer:

L.O can be tested on board by using Maker’s supplied test kit , which can give the result whether it is safe for further use or not.
For L.O test , sample oil must drawn out from correct point , such as from test cock or from pump’s discharge pressure gauge connection. It should not be drawn out from , filter out let and purifier out let .
Sample oil must be taken with standard plastic tube with seal for both on board test and Lab. analysis.
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Boiler Water Tests

(By Kamal Hossain, Chief Engineer)

Q. (a) Explain why regular testing of water in auxiliary boiler is advisable
(b) How to take correct sample
(c) Discuss what factors are necessary when measured value differ appreciably from desired value in each test.
(d) Give reasons for the situation when alkalinity is found to have fallen unaccountably.

Answer:

(a) For the well boiler operation, boiler water should be tested regularly and accurately. Then correct chemical treatment should be followed based on the test results for the following reasons.

– To keep the boiler water in alkaline condition
– To precipitate all scale forming , both dissolved and suspended salts in the boiler water , in the forms of removable and non-adherent sludge.
– To remove dissolved oxygen , carbon dioxide and other gases
– To produces substances which will be well below the limits for carry over , foaming and priming..
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Summary of Steering Gear Regulations & Requirements

(By Kamal Hossain, Chief Engineer)

SOLAS  REGULATION & REQUIREMENTS FOR STEERING GEAR

  1. Steering gear compartment must be separated from machinery spaces and readily assessable.
  2. Every ship shall be provided with main steering gear and auxiliary steering gear.
  3. The failure of one of them must not render the another one operation.
  4. Relief valves shall be fitted to any part of the hydraulic system. Setting shall not exceed designed pressure, i.e , 1.25 times of working pressure.
  1. Main steering gear and rudder stock shall be:
  • Capable to put rudder hard over from 35 deg. one side to 35 deg. another side not more than 28 second while running with full sea speed and full loaded draught.
  • They should be done at maximum astern speed as also.
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UMS System Failure

(By Kamal Hossain, Chief Engineer)

It is complete failure of the UMS, bridge control and data logging system has failed and the main engine is needed to run on manual control and monitoring.
(a) State with reasons six main items of data, which require to be monitored and recorded manually.
(b) Explain how a watch keeping system should be arranged to provide for effective monitoring and control of the main engine.
(c) Explain how the staff will be organized to maneuver the engine safely. State the machinery plants at which attentions are required during maneuvering.

Answer:

(a) When M.E to be put on manual control and monitoring, the following six main items of data to be monitored and recorded manually.

1. Cooling water system.
It is required to prevent the thermal stress and thermal loading on the engine. Engine may breakdown in severe
Case.
– Jacket water temperature and pressure
– Piston cooling temperature and pressure ( If water cool )
– Sea water temperature and pressure ( For Coolers & condenser ) …. to be checked & recorded.
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