JNTU
JNTU B.Tech II Year POWER SYSTEMS – I Previous Question Paper (September/October - 2023 - R16)
Note: i) Question paper consists of Part A, Part B. ii) Part A is compulsory, which carries 25 marks. In Part A, answer all questions. iii) In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
Part A
What are the components of a nuclear reactor?
Answer
The main components of a nuclear reactor include the nuclear fuel, moderator, control rods, coolant, reflector, and the pressure vessel or containment structure.
Mention the materials used as control rods and shield in a nuclear reactor.
Answer
Control rods are typically made of materials with high neutron absorption cross-sections such as cadmium, boron, or hafnium. Shielding materials used to protect against radiation include concrete, lead, and steel.
What is draft tube?
Answer
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Discuss the concept of pumped storage plant.
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Name the important components of an overhead transmission line.
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Mention the advantages of Ring mains system.
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How the substations are classified?
Answer
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What are the merits of Gas insulated substations?
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Define annual plant capacity factor.
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Mention the types of tariffs are used for domestic and commercial consumer.
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Part B
Give the comparison between fire tube and water tube boilers.
Answer
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Describe working of PWR (pressurized water reactor). What are its advantages and disadvantages?
Answer
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Describe the schematic arrangement of a thermal power station. Briefly explain the functions of each.
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Briefly discuss about the storage requirements in hydro power plant.
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Differentiate the advantage and disadvantages of the impulse and reaction turbine.
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Explain the concept how the power is calculated and estimated for the particular catchment area in hydro plant.
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Explain the working of Francis turbine.
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Explain the need for distribution system.
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Compare D.C. distribution with A.C distribution system.
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Give a Comparison between Under-Ground and Over- Head Distribution Systems.
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An 800m distributor fed from both ends A and B is loaded uniformly at the rate of 1.2A/m run, the resistance of each conductor being 0.05 ohm per/km. Determine the minimum voltage and the point where it occurs if feeding points A and B are maintained at 255 V and 250 V respectively. Find also the current supplied from feeding point A and B.
Answer
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What are the different types of bus-bar arrangements used in sub-stations? Illustrate with suitable diagrams.
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Compare Indoor and outdoor substations.
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Explain the single line diagram of gas insulated substations.
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Explain how a load duration curve is plotted? What is its use?
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An industrial organization takes a steady load of 2 MW at a p.f. of 0.75 lagging and pays Rs. 125 per annum per KVA of maximum demand. Determine the capacity of the phase advancing equipment required for minimum overall annual expenditure if the phase advancing equipment costs Rs. 200 per KVAR. An interest and depreciation charge on phase advancing equipment is 10%. Also, determine the new p.f. of the supply.
Answer
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What are the objectives and requirements of tariff?
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A consumer has the following connected loads: 15 lamps of 40W each and two heaters of 1,000W each. His maximum demand is 15000W. On the average he uses 10 lamps 5 hours a day and each heater for 3 hours a day. Find his average load, monthly energy consumption and load factor.
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