power plant Engineering Question Bank

QUESTION BANK POWER PLANT ENGINEERING UNIT – I PART – A 1. What is the function of economizer? 2. What is the purpose of air intake system in a diesel engine power plant? 3. What is the purpose of surge tank in a hydroelectric power plant? 4. What are the three main factors for power output of hydro electric power plant? 5. List out the major advantages of high pressure boilers in modern thermal power plant. 6. What are the modern trends in generating steam of high pressure boiler? 7. What are the main units in a gas turbine power plant? PART – B 1. Explain the working principle of steam power plant with layout and list the advantages and disadvantages. 2. Explain the working principle of MHD generator and list the advantages and disadvantages 3 .a. Explain the working principle of CFB Boiler with neat diagram b. With neat sketch explain the working principle of Lamont boiler. 4. Sketch the layout of hydroelectric power plant and explain the functions of each component in it. Discuss the advantages and limitations of this plant. 5. With neat sketch explain the working principle of gas turbine power plant and list the advantages and disadvantages. 6. a. Explain with neat sketch the construction and working of a fluidized bed boiler. b. With neat diagram explain the working principle of a modern high pressure boiler used in the thermal power station.

UNIT – II PART – A 1. What is pulverization? 2. What is cooling tower range? 3. What is the difference between overfeed and underfeed strokers? 4. State the advantages and disadvantages of pulverized coal firing. 5. What is the function of the cooling tower? 6. What is cyclone separator? PART – B 1. What are the types of mills used for pulverizing the coal? Briefly explain. 2. What are the functions of cooling tower? Briefly explain its types 3. a. Explain the working principle of ESP with neat diagram b. Describe with the help of neat sketches the working of 'forced draft' and ‘induced draft' cooling towers. 4. a. Draw an explanatory line diagram of an ash handling system employed in steam power plants and also explain the difficulties encountered in the handling of ash in a thermal power station b.Discuss the advantages and disadvantages of stoker firing, and explain the working of chain grate stoker with neat sketch. UNIT – III PART – A 1. What do u understand by moderation? 2. Explain the function of the moderator. 3. Define the term "Breeding". 4. Define unit speed of turbine. 5. What are the micro hydel plants? Why are they important now days?

6. What is a draft tube? In which turbine it is mostly used? 7. What is the function of draft tube in turbine outlet? 8. What is reaction turbine? Give an example. 9. Differentiate the impulse and reaction turbine. PART – B 1. Explain the working principle of nuclear power plant with layout and list the advantages and disadvantages. 2. a. Describe the boiling water reactor with the help of neat sketch and explain its chief characteristics. b. Explain the construction and working of pressurized water reactor. 3. Discuss the methods of nuclear waste disposal and safety. 4. Discuss Micro-hydro power plant. 5. a. Write shorts on governing of impulse turbine. b. Explain the construction and working of gas cooled reactor. UNIT – IV PART – A 1. What are the applications of diesel electric power plants? 2. What is diesel knock? 3. Define cetane number. 4. Define mean effective pressure as applied to gas power cycles. How it is related to indicated power of an I.C engine? 5. Mention various process of Brayton cycle. 6. Draw the p-V and T-s diagram of Brayton cycle. 7. What is the principle of operation of simple jet propulsion system? 8. Sketch the schematic arrangement of open cycle gas turbine power plant and name the components. 9. Discuss the effect of inter cooling in a gas turbine plant.

PART – B

1. Draw and explain the layout of a modern diesel power plant showing the following systems: Air Intake system Cooling system Fuel supply system Lubrication system and Exhaust system 2. Explain the various types of cooling system used in diesel power plant. 3. a. Briefly explain the pressure lubricating system. b. List out the advantages, disadvantages and applications of diesel engine power plant. 4. a. Bring out the difference between the closed cycle and open cycle gas turbine power plants. b.Draw a neat diagram of a regenerative gas turbine power plant having intercooling and reheater, also explain its working with a help of a p-v diagram. 5. In an air standard Brayton cycle, the air enters the compressor at 1 bar and 15°C. The pressure leaving the compressor is 5 bar, the maximum temperature in the cycle is 900°C. Find the following a. Compressor and expander work per kg of air b. The cycle efficiency If an ideal generator is incorporated into the cycle, determine the percentage in efficiency.

UNIT – V PART – A 1. Mention the advantages and disadvantages of the geo thermal power plant. 2. What is geothermal energy? 3. What is the significance of incremental rate for a power plant? 4. What are the various operating costs of coal fired steam plant? 5. Define diversity factor. 6. Define capacity factor. 7. What are the fixed costs? PART – B 1. Describe, with a help of neat sketch the working of a solar thermal receiver system plant and enumerate the advantages and disadvantages of concentrating collectors over flat plat collectors. 2. What is geothermal energy? Explain the different types of geothermal energy systems? 3. What are the different types of tidal power plants? Explain the different types with neat sketches. 4. a. What is depreciation? Explain any two in detail. b. Write shorts on load duration curves.

5. a. What are the elements which contribute to the cost of the electricity, and how can the cost of power generation be reduced? b. Determine the generating cost per unit of

80 MW power station

with the following data: Capital cost = Rs. 160 X 10 7 Annual cost of fuel

= Rs.32 X

lO6 Annual wages and taxes

= Rs. 36

x.106Interest and depreciation

= 10% of

capital cost Annual load factor

= 45%.

6. It is required to supply a load with a maximum demand of 500 MW and load factor of 0.74. Choice is to be made from a steam power plant, a nuclear power plant and a hydraulic power plant. Calculate the overall cost per Kw-hr in case of each scheme as given below.

Sl.N

Cost

o 1

Capital cost per MW

Steam

Nuclear

Hydraulic

Power plant

Power plant

Power plant

Rs.3.5 crore

Rs.5 crore

Rs.6 crore

installed 2

Interest

5%

6%

5%

3

Depreciation

6%

4%

5%

4

Operating cosr per Kw-hr

45 Paise

25 Paise

10 Paise

5

Transmission and

2 Paise

2.5 Paise

4 Paise

Distribution cost per Kw-hr