78EKG-2
Sr. No. 4
EXAMINATION OF MARINE ENGINEER OFFICER
ENGINEERING KNOWLEDGE
(GENERAL)
CLASS II
(Time allowed - 3 hours)
Total Marks 100
INDIA Morning Paper
N.B. - (1) Attempt SIX questions ONLY.
(2) All questions carry equal marks.
(3) Marks for each part question are shown in brackets.
(4) Neatness in handwriting and clarity in expression carries weightage
1. Describe the hull inspection, which you would carry out as a Senior Management Level Engineer of a
ship in drydock stating by a step by step listing the inspection you would make as the work started,
during and after completion of the work for the following:-
(a) Large sea water inlet chest and valves.
(6)
(b) Forward end of ship.
(5)
(c) Propeller and stern bush.
(5)
2. With regard to the carriage of crude oil and its associated products:
(a) Sketch and describe the operation of an explosimeter suitable for testing pump rooms or tanks. (8)
(b) State why false readings are likely to be given by the explosimeter. (8)
3. With reference to electric arc welding: -
(a) Draw a labeled sectional sketch of a satisfactory butt weld.
(6)
(b) Briefly define the following defects that may occur and how they may have been caused- (10)
(i) Under cut (ii) Splatter (iii) Inclusion (iv) Blow hole (v) Incomplete root penetration
(vi) Lack of fusion
4. In practice “two steps “ control device have a small “Dead Zone”. Illustrate this by means of an
explanatory diagram. (6)
(a) Explain what is meant by “two steps” control and give THREE examples of where such a control
system may be used in an engine room of a ship. (5)
(b) Explain what is meant by proportional control. (5)
5. Describe TWO methods of tracing a superficial crack in a marine machinery component. Explain how
propagation of a crack in a propeller keyway can be arrested. (16)
6. (a) Sketch a line diagram of a high pressure cut-out of the type fitted in a refrigeration system. (6)
(b) (i) Describe the operation of the high pressure cut-out sketched in Q.6(a).
(ii) State TWO faults that would cause excessive high pressure and suggest remedy for EACH
fault. (10)
7. Comment on the suitability of EACH of the following courses of action in the event of an overheated
transmission shaft bearing: (16)
(a) reduce the ship’s speed;
(b) cool with a fire hose;
(c) change lubricating oil;
(d) adjust height of bearing;
(e) adjust height of adjacent bearing.
8. Which of the flange types listed below identifies the construction of a pipe joint where a flange is
slipped over a length of pipe, the pipe end is heated, then setup (flanged) in a special machine, and
then the end of the pipe is machined to form the actual face of the joint.
(a) Raised face flange (b) Socket joint (c) universal joint (d) Lap joint flange
State the correct answer and give adequate reasons explaining how this type of flange differs from the
other types listed. (16)
9. The steam condenser of a tanker having high pressure double evaporation water tube boilers, requires
re-tubing. As a senior management level engineer you have been entrusted with the task of selection
of tubes. What specific characteristic feature you would choose from the following to select a tube
and why? (16)
(a) Allowed working pressure
(b) Cross-section area
(c) Nominal inside diameter
(d) Nominal outside diameter
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