DieselShip's Online Content Library

Q1. With regard to care of lubricating oils onboard, answer the following:

(a)  Microbial degradation of lubricating oil and measures to prevent the same

(b)  Methods of ensuring correct sampling is done for the purpose of shore based testing.

(c)  If the shore based testing results show an abnormal values of water content and TBN for the crank case lub oil of a slow speed main engine, what will be interpretation and subsequent action?

Q6. Sketch and describe a “fail safe steering gear” suitable for use on a tanker of more than 100,000 T dwt; Explain the sequence of events that take place when an oil leak takes place in one of the hydraulic pipe lines.

Q7. Compare the destructive testing done on engineering materials with non-destructive testing done on engineering components. Briefly describe one destructive test and two non-destructive tests to illustrate your answer

Q4. During routine soundings, it is found that leakage into a cofferdam is occurring from an adjacent deep cargo oil tank. As Second Engineer state the procedure for directing safe entry by the engine room staff to ascertain the cause of the leakage. If the leakage persists, discuss EACH of the following options as a possible remedy: i) Leave the cofferdam to flood with oil (ii) Flood the cofferdam with sea water (iii) Seal the Cofferdam and pressurize with air (iv) Pump the leakage to bunker tanks.

Q1. Discuss, with reference to the superheater outlet temperature of the main boiler operating at a constant load, the following statements:

a) An increase in excess air will tend to cause a decrease in superheater outlet temperature due to the cooling effect of more air being introduced.

b) A decrease in economizer inlet temperature will tend to cause a decrease in super heater outlet temperature due to the cooling effect of more water being introduced.

c) Badly fouled generating tube banks will cause an increase in the super heater outlet temperature.

d) Excessive amounts of total dissolved solids in the boiler water will cause variations in the super heater outlet temperature

Q6. With reference to hydraulic system for deck machinery identify: A. The types of contamination likely to be found in hydraulic systems for deck machinery; B. The sources of such impurities; C. Means used to prevent problems with contamination; D. Possible effects of the oil contamination on the system.

Q2. Sketch a high-lift safety-valve lid and seat detailing their special features. Describe how such a valve is overhauled and any clearance that should be measured and noted. (16)

Q3. A. Sketch and describe TWO methods that employ manometric means for measuring tank contents. (6)

B. State what corrections are made to the readings obtained by the methods described in (A) in order to gauge the mass contents? (5)

C. Explain how bunkering requirements may be estimated when no records of main engine fuel consumption are available on board. (5)

Q6. With respect to tankers describes: - (16)

A. How a pump room is ventilated?

B. How cargo tanks are ventilated?

C. Cargo tank protection as per SOLAS 1974.

D. Additional alarms provided for inert gas systems of the ‘inert gas generator’ type.