Power Plant Technology Exam Prep
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Power Plant Technology Exam Prep
English 26 leveled MCQs Free
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10 marks Long answer
Write short notes on (any three): (a) Governing mechanism in hydraulic turbine. (b) Thermoelectric Generator. (c) Boiler mounting and accessories. (d) Solar Cell. (e) Load Curve.
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Cover key functions and applications of each topic.
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8 marks Long answer
60MW power station has an annual peak load of 50MW. The power station supplies loads having maximum demands of 20 MW, 17 MW, 10 MW and 9 MW, the annual load factor is 0.45. Determine (i) Average load (ii) Energy supplied per year (iii) Diversity factor (iv) Demand factor.
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Calculate using load factor and peak load.
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8 marks Long answer
Calculate the amount of coal containing the same energy as 1 kg of Natural Uranium under the following assumptions. Also calculate the number of fissions per second to produce 1 watt power. (i) Energy release from one fission of U235 = 200 MeV (ii) Atoms in one-gram pure U235 = $25.64 \times 10^{20}$ (iii) Calorific value of coal = 6000 kcal/kg (iv) U235 content in Natural Uranium = 0.7% (v) Fission efficiency = 50% (vi) One Joule = 0.239 cal.
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Use energy conversion formulas and fission rate calculations.
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6 marks Long answer
A horizontal axis wind turbine operates under speed of 20 m/s and 27°C. The diameter of rotor is 80 m and speed of the rotor is 40 rpm. Calculate (1) the power available at the turbine rotor, (2) the torque produced at shaft for maximum output.
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Use wind power equations and torque formulas.
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5 marks Long answer
Compare the working and performance of diesel and gas turbine power plants.
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Diesel plants are more flexible, while gas turbines are more efficient.
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4 marks Medium answer
What are the key factors for consideration while setting up captive power plant?
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Location, fuel availability, environmental impact, and economic feasibility.
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4 marks Medium answer
Water for a hydroelectric power station is obtained from a reservoir with a head of 150 m. What will be the approximate electrical power generated per hour per cubic meter of water if mechanical efficiency is 0.85 and electric efficiency is 0.92?
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Power = 0.85 * 0.92 * 9.81 * 150
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4 marks Medium answer
Define draught. What is the use of draught in thermal power plants.
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Draught is the pressure difference used to move air; it ensures proper combustion.
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4 marks Medium answer
What factors determine the choice of site of a thermal power plant?
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Proximity to fuel sources, water supply, and environmental regulations.
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4 marks Medium answer
Discuss the function of combustion chamber in a gas turbine in reference of combustion and cooling.
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It facilitates fuel combustion and cools the turbine components.
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4 marks Medium answer
What is HRSG? How a Combined Steam Power Plant efficiency improves using HRSG?
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Heat Recovery Steam Generator; it captures waste heat for steam production.
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4 marks Medium answer
Write the principle of operation of a fast breeder nuclear reactor.
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It breeds more fissile material than it consumes.
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4 marks Medium answer
Briefly discuss why HAWT is considered as the most efficient type of turbine.
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HAWTs have higher efficiency due to optimal wind capture.
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4 marks Medium answer
Discuss the merits and demerits of a solar thermal power plant.
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Merits include renewable energy; demerits include land use.
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3 marks Medium answer
What are the types of tariffs in economics of power generation?
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Flat rate, time-of-use, and demand charges.
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3 marks Medium answer
Give examples of moderators, control rods and coolant in a nuclear reactor?
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Water, boron, and liquid sodium.
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1 marks Short answer
__________ is a safety device used to protect the boiler when the water level falls below the minimum level in the boiler.
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Low water cutoff
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1 marks Short answer
Which of the following information is NOT found through the load curve?
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Total number of units generated
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1 marks Short answer
Which type of compressor commonly used in a gas turbine power plant?
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Multistage axial flow compressor
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1 marks Short answer
Which of the following power plants is most efficient but has high initial cost?
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Nuclear power plant
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1 marks Short answer
A diesel power station spends 0.20 kg/kWh fuel. If the calorific value is 20000 kcal/kg then overall efficiency of the power station will be __________%.
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40
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1 marks Short answer
In Nuclear power station, moderator is used to
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Reduce the speed of neutrons
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1 marks Short answer
if the speed of a wind stream remains unchanged while passing through the rotor, then
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Zero power will be generated
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1 marks Short answer
The band gap of the semiconductors to be used as solar materials is __________
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1.1 eV
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1 marks Short answer
In geo thermal power plants waste water is
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Recirculated after cooling in cooling towers
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1 marks Short answer
In closed cycle MHD-steam power plant, which of the following gas is seeded in the MHD duct?
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sodium vapour
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