ENG3012 Engineering Science B AY 2021/22 Examination Semester 2 B2. An office with the following electrical appliances i

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Eng3012 Engineering Science B Ay 2021 22 Examination Semester 2 B2 An Office With The Following Electrical Appliances I 1 (91.17 KiB) Viewed 31 times

ENG3012 Engineering Science B AY 2021/22 Examination Semester 2 B2. An office with the following electrical appliances is operated as tabulated below. Given that there are 365 days in a year. Name of electrical appliance Operating hour Quantity each day Lamp Refrigerator Printer Desktop Computer LCD Display The rated power of the electrical appliance 50W 150W 70W 2kW 30W 8 10 10 8 8 5 1 3 5 5 (a) What is the total electric energy consumed each day in watt-hour for the above devices? (6 marks) (b) What is the total electric energy consumed in kilowatt-hour each year? (4 marks) (c) If the electric company charged $2.5 for each kilowatt-hour, how much money need to pay for a year? (2 marks) (d) If Lamps are powered by renewable energy, find the amount of the electricity cost can be saved per year? (3 marks)