Category: EK GENERAL

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With reference to a vapour compression refrigeration plant, explain the purpose of EACH of the following: (a) Room thermostat (2) (b) Expansion valve (2) (c) High pressure cut out (2) (d) Safety head (2) (e) Unloader (2) 10 marks Oct 2024 Reefer & A/C Oct 2024 (Q6)

EK General Oct 2024 (Q5)

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Describe, with the aid of a sketch, the operation of a biological sewage treatment plant (10) 10 marks Oct 2024, Oct 2022 Sewage system Oct 2024 (Q5)

EK General Oct 2024 (Q4)

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Describe EACH of the following heat exchanger types, stating a suitable application for EACH type: (a) Parallel flow (3) (b) Contra flow (3) (c) Mixed flow (4) 10 marks Oct 2024, Dec 2021, Oct 2018 Heat exchanger Oct 2024 (Q4)

EK General Oct 2024 (Q3)

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(a) Sketch a muff type propeller shaft coupling. (5) (b) Describe how this type of coupling is connected. (5) 10 marks Oct 2024, Oct 2022 Propeller, shafting & thrusters Oct 2024 (Q3)

EK General Oct 2024 (Q2)

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With reference to control systems, explain EACH of the following: (a) Two-step action (2) (b) Offset (2) (c) Gain (2) (d) Proportional action (2) (e) Integral action (2) 10 marks Oct 2024 Instrumentation & control Oct 2024 (Q2)

EK General Oct 2024 (Q1)

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(a) Materials used for hulls and machinery are subject to stress and strain in service. Define EACH of the following: (i) THREE types of stress (3) (ii) TWO types of strain (2) (b) Describe the tests that may be carried out on steel to be used for ships side plating. (5) 10 marks Oct 2024,…

EK General Jul 2024 (Q8)

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Describe the inspections and tests that should be carried out to ensure satisfactory condition and operation of the ship’s fire fighting equipment. (10) Fire Jul 2024 (Q8)

EK General Jul 2024 (Q7)

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With reference to air compressors for general service use: (a) Explain the principle of operation of a screw type compressor (4) (b) Explain the advantages of screw compressors over reciprocating compressors in terms of running and maintenance (6) Compressed air system Jul 2024 (Q7)

EK General Jul 2024 (Q6)

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With reference to a keyless propeller designed for hydraulic (wet) fit and withdrawal: (a) Describe, with the aid of a sketch, how the propeller is fitted to the tail shaft; (6) (b) State TWO advantages compared to a dry fit; (2) (c) Explain how the thrust is transmitted without the use of a key and…

EK General Jul 2024 (Q5)

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