Tag: #mca

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With reference to main engine crankcase explosions: (a) Explain the cycle of events leading to a secondary crankcase explosion (6) (b) As Chief Engineer Officer, explain how an engine system should be managed in order to minimize the risk of a crankcase explosion and the effects of a crankcase explosion should one occur. (10) Crankcase…

EK General Oct 2017 (Q1)

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With reference to plate heat exchanger, explain how EACH of the following design aspects promote heat transfer: (a) Material selection (5) (b) Flow pattern (3) (c) Extended surface area (2) Heat exchanger Oct 2017 (Q1)

EK Motor Jul 2017 (Q1)

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in EK Motor

As Chief Engineer Officer, write a report to the engineering superintendent regarding failure of a four-stroke main engine, to complete a slow turning procedure and the discovery of water around a cylinder head gasket after the failed slow turning attempt. The report must outline the possible cause of the problem and the steps taken to…

EK General Jul 2017 (Q8)

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The company, with which you are employed, requests that all Chief Engineer Officers prepare standing orders regarding the prevention and detection of fires in the machinery spaces Compile such a list of recommendation to be submitted to central office (10) Fire Jul 2017 (Q8)

EK General Jul 2017 (Q7)

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With reference to medium speed auxiliary diesel engines: (a) Explain why twin air inlet and exhaust valves are often fitted to each cylinder head (6) (b) Explain why, in some cases, valve rotation is employed (4) Auxiliary engine Jul 2017 (Q7)

EK Motor Mar 2017 (Q9)

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in EK Motor

A slow speed diesel engine crankcase lubricating oil analysis report indicates a substantial presence of fresh water, metal particles and a reduction of BOTH alkalinity and antioxidant reserve Explain the possible cause of EACH of these changes, and how they may be found (16) Lubricating oil & system Mar 2017 (Q9)

EK General Jul 2017 (Q6)

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With reference to a domestic refrigeration plant, state TWO causes of EACH of the following conditions, stating how EACH cause may be rectified (a) Excessive pressure (2) (b) Low pressure at evaporator suction (2) (c) Compressor cycling (2) (d) Compressor running for long periods but not lowering the temperature in the cold rooms (2) (e)…

EK General Jul 2017 (Q5)

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Describe, with the aid of a block diagram, a compensated control system for an active fin stabilization unit (10) Steering & stabilizers Jul 2017 (Q5)

EK General Jul 2017 (Q4)

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With reference to centrifugal pumps and pumping systems: (a) Explain, with the aid of a diagram, the distinction between Net Positive Suction Head available (NPSHa) and Net Positive Suction Head required (NPSHr) (8) (b) Explain how the NPSHa may be increased by design (2) Pumps & system Jul 2017 (Q4)

EK Motor Mar 2017 (Q8)

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