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Motor 3

The document outlines an examination for the position of Second Engineer Officer, focusing on engineering knowledge related to marine engines. It includes various questions covering topics such as cylinder liner cooling, bottom end bearing inspection, crankcase explosions, boiler maintenance, air starting systems, and fuel pump settings. The exam is structured with specific marks allocated to each question, emphasizing practical knowledge and maintenance procedures.

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ashkanranjbar2000
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10 views2 pages

Motor 3

The document outlines an examination for the position of Second Engineer Officer, focusing on engineering knowledge related to marine engines. It includes various questions covering topics such as cylinder liner cooling, bottom end bearing inspection, crankcase explosions, boiler maintenance, air starting systems, and fuel pump settings. The exam is structured with specific marks allocated to each question, emphasizing practical knowledge and maintenance procedures.

Uploaded by

ashkanranjbar2000
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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Candidate's name:

Ports and Maritime Organization


Seafarers' Examination and Documents Directorate
Exams Code: SEMK - 948

Subject: Engineering knowledge (Motor) Date: 1394.11.19


Rank: Second Engineer Officer (KW>3000) Time allowed: 3.0 Hrs

(Pass mark: 60 )

Q.1) - a) - Explain why bore cooling is necessary for the upper section of a large main
engine cylinder liner. (8M)
b) - Describe the effects of inadequate cylinder liner cooling. (4M)
c) - State what routine maintenance are required to ensure adequate cylinder liner cooling.
. (4M)

Q.2) - With reference to the bottom end bearing of a four stroke medium speed main engine which
has been opened for inspection;
a) - List with reasons, the checks which should be made during inspection. (6M)
b) - List with reason, the checks which should be made while assembling the bearing. (6M)
c) - State the checks which must be made after assembly and before the engine is returned to
full service. (4M)

Q.3) - With reference to crankcase explosion;


a) - Describe how a primary explosion occurs and how this may lead to a secondary explosion.
. (8M)
b) - Explain the action to be taken in the event of an oil mist detector alarm sounding.
(8M)

Q.4) - a) - Describe the procedure for cleaning the gas side of the tube surface of auxiliary oil
fired boiler. (6M)
b) - Explain how the effectiveness of a tube cleaning procedure is assessed. (2M)
c) - Describe the procedure for taking a boiler water sample, analyzing the sample and
determining the water treatment required from the result of the boiler water analysis. (8M)

Q.5) - Sketch an air starting system for main engine and describe its reversing mechanism.
(18 M)

Q.6) - Describe how a main engine fuel pump (jerk type) would be set and checked for;
a) - Timing (6M)
b) - Quantity (6M)
c) - Explain with use of sketch principal of operation of variable injection timing (VIT). (6M)

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