Question Paper: Energy Engineering : Question Paper Jun 2015 - Mechanical Engineering (Semester 5) | Visveswaraya Technological University (VTU)
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## Energy Engineering - Jun 2015

### Mechanical Engg. (Semester 5)

TOTAL MARKS: 100
TOTAL TIME: 3 HOURS
(1) Question 1 is compulsory.
(2) Attempt any four from the remaining questions.
(3) Assume data wherever required.
(4) Figures to the right indicate full marks.
1 (a) List out the different types of fuels used for steam generation. Briefly explain them.(10 marks) 1 (b) With a neat sketch, explain the working of travelling grate stroker.(6 marks) 1 (c) With a neat sketch, explain the working of cyclone burner.(4 marks) 2 (a) With a neat sketch, explain the working of Schmidt- Hartmann boiler.(10 marks) 2 (b) Explain with a neat sketch the working of hyperbolic cooling tower.(5 marks) 2 (c) Determine the height of chimney to get a net drought of 12 mm if the total draught losses are 4mm. The temperature of air is 25°C and the temperature of chimney gases is 300°C. The mass of air used per kg of fuel is 18 kg. One kh of air occupies a volume of 0.7734 m3 at NTP.(5 marks) 3 (a) Draw the schematic diagram of DG power plant. Mention the function of each component of the plant.(10 marks) 3 (b) Explain the different methods used for starting diesel engines.(6 marks) 3 (c) Write a note an filters used in intake system of diesel engine.(4 marks) 4 (a) What is surge tank? What are its functions? List out the types of surge tanks used in hydroelectric power plant.(6 marks) 4 (b) What do you mean by water hammer? How it will be formed?(4 marks) 4 (c) The run-off data of a river at a particular site is tabulated below.

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 Month Mean discharge millions of m3/month Month Mean discharge millions of m3/month Jan 40 July 70 Feb 25 Aug 100 Mar 20 Sep 105 April 10 Oct 60 May 0 Nov 50 June 50 Dec 40

i) Draw the hydrograph and find the mean flow
ii) Draw the flow duration curve
iii) Find the power in MW available at mean flow if the head available is 100 m and overall efficiency of generation is 80%.(10 marks) 5 (a) With a neat sketch, explain the working of Fast Breeder Reactor State its advantages and disadvantages.(10 marks)

### Write a note on:

5 (b) i) Radiation hazards.(5 marks) 5 (b) ii) Radioactive waste disposal.(5 marks) 6 (a) What is the difference between a pyrheliometer and a pyranometer? Describe the principle of Angstrom Pyrheliometer.(6 marks) 6 (b) What is the principle of photovoltaic power generation? With a neat sketch, explain the working of photovoltaic cell.(6 marks) 6 (c) Determine extra-terrestrial normal radiation and extra-terrestrial radiation on a horizontal surface on February 15 at 2 pm solar time for 40° N latitude. Also determine the total solar radiation on the extra-terrestrial horizontal surface for the day.(8 marks) 7 (a) Describe the tidal energy harnessing by 'Two basin with liked basin' method.(6 marks) 7 (b) List out the problems associated with OTEC power plant.(6 marks) 7 (c) With a schematic diagram, explain the working of vapour dominated geothermal power plant.(8 marks) 8 (a) Clearly describe the production of oxygen from photosynthesis process.(6 marks) 8 (b) With a neat sketch, explain the working of Indian type bio gas plant.(8 marks) 8 (c) With a neat sketch, explain the working of fluidized bed gasifier.(6 marks)