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Total No. of Questions : 21
[Total No. of Printed Pages : 2
[2]
Roll No .....................................
MEEM-302(A)
M.E/M.Tech., III Semester
Examination, November 2023
Energy Efficiency in Electrical Utility
(Elective-II)
Time : Three Hours
Maximum Marks : 70
Note: i) Attempt any five questions.
ii) All questions carry equal marks.
1. a)
What will happen to my electricity bill if I increased my meter load from 2kw to 5kw (single-phase) without any increase in the number of appliances in my house and the power consumption is totally the same as before? Will it affect my bill and how much?
b)
What are the causes of low power factor? What is the use of power factor? Why do we need to improve it?
2. a)
What is the PF rating of a capacitor? Discuss the best location for power factor improvement apparatus.
b)
What is core loss in transformers? What causes it? What are its effects on transformer losses?
3. a)
Discuss the challenges faced in a rewinding three-phase induction motor.
b)
If a three phase induction motor is running and suddenly, two phases open, what happens? Explain it.
4. a)
Discuss the difference between an energy efficient motor and a high efficiency motor.
b)
How many types of air compressors are there? And how does it work?
5. a)
Discuss the difference between air refrigeration system and Vapour compression refrigeration system.
b)
What is a vapour absorption system? What is the working principle of vapour absorption refrigeration system?
6. a)
What is a centrifugal fan? What are the performance characteristics of the centrifugal fan?
b)
What are the different types of pumps used in industry, and what are their applications?
7. a)
What are the different energy conservation opportunities in cooling tower and pumping system?
b)
What are cooling tower configurations and applicable process applications?
8. a)
What factors determine fuel consumption in diesel generator?
b)
What is a Comprehensive Energy Audit and how does it help organizations optimize their energy usage and reduce costs?