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Q1. A fire in the exhaust gas boiler on a motor ship may develop in two or three stages. With reference to such situations, discuss: A. The factors which could be a cause for initiation and development of: (i) Ignition of soot; (ii) Small soot fires; (iii) High temperature fires. B. State the standing instructions you, as a Second Engineer Officer, would issue with respect to the action to be taken in the event of a boiler uptake fire.

Q5. A. Sketch a four-ram steering gear arrangement capable of 100% redundancy; B. Describe the operation of the arrangement sketched in A.

Q3. Sketch and describe a cargo space inert gas system producing washed gas from either a main boiler or from an independent gas generator module. Elaborate the alarms and cut-outs incorporated in the system to prevent any accident.; Explain the various protections for cargo tanks with respect to pressure vacuum build up inside the tanks.

Q6. With reference to Liquefied Natural Gas Carriers (LNG), explain the inspection you will carry out on the following equipment’s - A. LNG Vaporizer; B. Re-gasification plant; C. Cargo pumps; D. Emergency discharge pumps.

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)

Q1. A. Describe an automatic self de-sludging centrifuge suitable for dealing with fuel of density upto 1010 kg/m3 at 150C;

B. Explain how the centrifuge described in Q4 (a) is able to remove water from a fuel which has a density that is higher than that of water and state factors that may assist the operation.

C. As Second Engineer, write down the start-up procedure for the centrifuge described in Q1 (A) for the benefit of your staff;

D. State how is the problem of catalytic fines in fuel oil may be dealt with.

Q2.A. Explain how analysis of used lubricating oil can be used as a “health-monitoring” tool for diesel engines.

B. Describe how vibration measurement can be used with a main engine turbo-charger:

i. For fault analysis;

ii. For condition monitoring with respect to maintenance;

iii. As a substitute to opening up machinery for survey.

Q9. (a) For Freon-22 vapor compression refrigeration machine, state how each of the following faults are indicated and how they are remedied:

(i) Air in the system

(ii) Moisture in the system

(iii) Undercharge

(iv) Overcharge

(b) Describe with a diagram detailing the devices incorporated into the refrigeration system to protect the machinery and equipment against malfunction.

Q9. A. Sketch a reciprocating air compressor incorporating a first stage rotary compressor; B. Explain the motive behind such, an arrangement; C. state with reasons whether the advantages claimed for this design justify the Added complexion.