Category: EK GENERAL

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(a) State the factors in the storage of Manual Metal Are welding electrodes which will assist in producing good quality welds. (2) (b) Explain the importance of edge preparation before welding. (2) (c) Sketch THREE electric arc welding defects, stating the cause of EACH. (6) Materials Dec 2022 (Q2)

EK General Dec 2022 (Q1)

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(a) Describe the properties of EACH of the following alloys used in marine engineering, giving a practical example for which EACH are suited: (i) Cupro-nickel (2) (ii) White metal (2) (iii) Titanium (2) (b) Discuss the merits of EACH of the following alloys for use in the casting of large propellers: (i) Nickel aluminum bronze.…

EK General Oct 2022 (Q8)

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With reference to fixed fire fighting systems employing fresh water in a high fog or mist explain EACH of the following (a) how the fire is contained and extinguished: (4) (b) the importance of particle size and flow rate; (4) (c) state the means by which the system may be activated (2) Fire Oct 2022…

EK General Oct 2022 (Q7)

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With reference to a vapor compression refrigeration plant (a) Explain the purpose of EACH of the following (i) Expansion valve (2) (ii) Room thermostat (2) (iii) High pressure cut out (2) (b) Explain why EACH of the following conditions are desirable (i) Superheating at the compression suction (2) (ii) Undercooling at the condenser outlet (2)…

EK General Oct 2022 (Q6)

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With reference to a hydraulic steering gear, explain EACH of the following: (a) the factors that may contribute to the failure of a hydraulic pipe coupling: (2) (b) why it is of the utmost importance that in the event of a hydraulic system failure that the rudder is locked and isolation of the affected area…

EK General Oct 2022 (Q5)

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

EK General Oct 2022 (Q4)

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With reference to heat exchangers, describe how EACH of the following design aspects promote heat transfer: (a) material selection; (5) (b) flow patterns; (3) (c) extended surface areas. (2) Heat exchanger Oct 2022 (Q4)

EK General Oct 2022 (Q3)

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

EK General Oct 2022 (Q2)

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(a) Explain EACH of the following control terms: (i) proportional action; (2) (ii) integral action. (2) (b) Describe, with the aid of a sketch, a control system that may be enhanced by the inclusion of cascade control. (6) Control system Oct 2022 (Q2)

EK General Oct 2022 (Q1)

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