Tag: #efficiency
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EK Electrical Dec 2018 (Q11)
(a)With reference to alkaline battery cell (i) Describe a typical cell, stating the materials used (4) (ii) Describe the process that takes place during discharge and charge (2) (iii) State the effects of overcharge (2) (b) State the advantages of an alkaline cell compared with a lead acid cell. (2) Batteries & Emco power supplies…
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EK General Dec 2023 (Q4)
With reference to plate type heat exchangers: (a) Sketch a cross sectional view showing the plate design pattern and the directions of hot and cold fluid flow (4) (b) State TWO reasons for the plate design patterns (2) (c) State, with reasons, FOUR advantages of a plate cooler compared to shell and tube type. (4)…
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EK General Jul 2018 (Q6)
With reference to refrigeration systems: (a) Explain why undercooling of the refrigerant at the condenser outlet is desirable; (3) (b) Describe, with the aid of a sketch, how a heat exchanger could be incorporated in the circuit to enhance undercooling (5) (c) Explain the possible consequences of the refrigerant having a dryness fraction at the…
UKM Tuticorin 